IBCP


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:MajorCustomers, us-gaap:ProductOrService
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:MajorCustomers

us-gaap:InterestAndFeeIncomeLoansAndLeases
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:InterestExpense
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestIncomeExpenseNet
us-gaap:PlanName
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:TitleOfIndividual

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:ConsolidatedEntities
us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
us-gaap:AwardType, us-gaap:PlanName
us-gaap:PlanName, us-gaap:AwardType

us-gaap:UnrecognizedTaxBenefits

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

ibcp:AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR

ibcp:ConservationBufferPercentagePointsAddedToMinimumRatioForAdequatelyCapitalizedInstitutions

ibcp:CreditRelatedOTTIRecognizedInEarnings

ibcp:DataProcessing

ibcp:DepositorAccountsFeesAndCommissions
us-gaap:FinancialInstrument
ibcp:ImpairmentCollateralDependentOtherThanRealEstate

ibcp:InterchangeExpense

ibcp:InterchangeIncome

ibcp:LoanAndCollection

ibcp:LoansHeldForSaleUnrealizedGainLoss
us-gaap:FinancialInstrument

ibcp:MortgageLoanServicingIncome

ibcp:NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments

ibcp:NoninterestIncomeOtherOperatingIncomeOther

ibcp:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax

ibcp:ProceedsFromSaleOfEquitySecurities

ibcp:ProvisionForLossReimbursementOnSoldLoans

ibcp:PurchaseOfSecuritiesAvailableForSaleNotYetSettled

ibcp:SecuritizationOfPortfolioLoans

ibcp:ServicingAssetUnrealizedGainLoss
us-gaap:FinancialInstrument
us-gaap:TitleOfIndividual
ibcp:SharesIssuesInPlaceOfRetainerFees

ibcp:StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors

ibcp:WeightedAverageNumberOfPerformanceSharesStock

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:AdvertisingExpense

us-gaap:AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease

us-gaap:AssetImpairmentCharges

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
us-gaap:BusinessAcquisition
us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion
us-gaap:BusinessAcquisition
us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions
us-gaap:BusinessAcquisition
us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:Communication
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:DebtAndEquitySecuritiesRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DepreciationAmortizationAndAccretionNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:IncomeStatementLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount
us-gaap:TitleOfIndividual
us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

us-gaap:EquipmentExpense
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsNumberOfContracts2
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown

us-gaap:GainLossOnSalesOfLoansNet
us-gaap:CounterpartyName, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrument

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:IncomeTaxesPaid

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInLoansDeferredIncome

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestPaid

us-gaap:LaborAndRelatedExpense

us-gaap:LeaseCost

us-gaap:MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherNoninterestExpense

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromPaymentsForInInterestBearingDepositsInBanks

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfForeclosedAssets

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment
us-gaap:CounterpartyName, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrument

us-gaap:ProceedsFromSaleOfLoansHeldForSale
us-gaap:AwardType
us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForLoanAndLeaseLosses
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
us-gaap:TitleOfIndividual
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodShares
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:TransferOfOtherRealEstate

us-gaap:VariableLeaseCost

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

ibcp:AccruedInterestImpairedLoans

ibcp:AllowanceForLoanLossesAllocated
us-gaap:ConsolidatedEntities
ibcp:AllowanceForLoanLossesAndUnfundedLendingCommitmentsLimitedAtSpecificRiskWeightedAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
ibcp:CapitalizedMortgageLoanServicingRightsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel
ibcp:CashAndDueFromBanksFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

ibcp:CollateralDependentLoansCarryingAmount

ibcp:CollateralDependentLoansValuationAllowance
us-gaap:ConsolidatedEntities
ibcp:CommonEquityTierOneCapitalToRiskWeightedAssets
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScore500To549
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScore550To599
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScore600To649
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScore650To699
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScore700To749
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScore750To799
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScoreByInvestment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScoreUnder500
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment
ibcp:CreditScoreUnknown
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:ConsolidatedEntities
ibcp:DisallowedDeferredTaxAssets
us-gaap:FairValueByFairValueHierarchyLevel
ibcp:DomesticDepositSavingsNoStatedMaturity
us-gaap:FairValueByMeasurementBasis
us-gaap:FinancingReceivablePortfolioSegment
ibcp:EightHundredsAndAbove
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI
us-gaap:FinancialInstrument
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
ibcp:FinancingReceivableGovernmentGuaranteedLoans
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities, us-gaap:UnusualOrInfrequentItem
ibcp:FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities, us-gaap:UnusualOrInfrequentItem
us-gaap:FinancialInstrumentPerformanceStatus
ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrumentPerformanceStatus

ibcp:ImpairedFinancingReceivables
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
ibcp:ImpairedLoansFairValue
us-gaap:FinancialInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FinancialInstrument, us-gaap:FairValueByMeasurementFrequency, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InterestBearingDepositsTime
us-gaap:FairValueByFairValueHierarchyLevel
ibcp:InterestBearingDepositsWithBanksFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

ibcp:LoansAndLeasesReceivableRecordedInvestment
us-gaap:FairValueByFairValueHierarchyLevel
ibcp:NetLoansAndLoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

ibcp:NonTroubledDebtRestructuringAllowanceBasedOnCollateral

ibcp:NonTroubledDebtRestructuringAllowancesBasedOnCollateral

ibcp:NonTroubledDebtRestructuringImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance

ibcp:OtherRealEstateImpairedNetReserves
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:Range, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
ibcp:OtherRealEstateMeasurementInput
us-gaap:MeasurementInputType, us-gaap:FinancialInstrument, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique, us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:FinancialInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique, us-gaap:MeasurementInputType

ibcp:PercentageOfRevenueExcludedFromASU201409

ibcp:PrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeCumulativeCreditRelatedOTTI

ibcp:PrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTIAmortizedCost
us-gaap:FinancialInstrument

ibcp:PrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTINonCreditUnrealizedLosses
us-gaap:FinancialInstrument

ibcp:PrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTIUnrealizedGains
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
ibcp:PrivateLabelMortgageBackedSecuritiesWithOTTIUnrealizedGains
us-gaap:ConsolidatedEntities
ibcp:QualifyingTrustPreferredSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
ibcp:RealEstateOther
us-gaap:FinancialInstrument, us-gaap:FairValueByMeasurementFrequency, us-gaap:FairValueByFairValueHierarchyLevel

ibcp:ReciprocalDeposits

ibcp:ReciprocalDepositsIncludedInDepositsWithNoStatedMaturity

ibcp:ReciprocalDepositsIncludedInDepositsWithStatedMaturity

ibcp:ReserveForLossReimbursementOnSoldLoans

ibcp:TroubledDebtRestructuring
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:InternalCreditAssessment
us-gaap:InternalCreditAssessment, us-gaap:FinancingReceivablePortfolioSegment

ibcp:TroubledDebtRestructuringAllowanceBasedOnCollateral

ibcp:TroubledDebtRestructuringAllowanceBasedOnPresentValueCashFlow

ibcp:TroubledDebtRestructuringAllowancesBasedOnCollateral

ibcp:TroubledDebtRestructuringAllowancesBasedOnPresentValueCashFlow

ibcp:TroubledDebtRestructuringAmount

ibcp:TroubledDebtRestructuringLoansAndLeasesReceivableSpecificAllowance

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

us-gaap:BankOwnedLifeInsurance
us-gaap:ConsolidatedEntities
us-gaap:Capital
us-gaap:ConsolidatedEntities
us-gaap:CapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:CapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:CapitalToRiskWeightedAssets

us-gaap:CashAndDueFromBanks
us-gaap:BusinessAcquisition
us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield
us-gaap:BusinessAcquisition
us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
us-gaap:BusinessAcquisition
us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesOutstandingBalance
us-gaap:BusinessAcquisition, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:CreditLossStatus
us-gaap:CreditLossStatus, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:BusinessAcquisition
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:CreditLossStatus
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapital
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapitalRatio
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:Deposits

us-gaap:DepositsSavingsDeposits
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeAssetNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
us-gaap:HedgingDesignation
us-gaap:HedgingDesignation, us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk
us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType
us-gaap:DerivativeFairValueOfDerivativeNet
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk
us-gaap:HedgingDesignation
us-gaap:HedgingDesignation, us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk
us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DerivativeLiabilities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByLiabilityClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FairValueOptionAggregateDifferencesLoansAndLongTermReceivables

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock
us-gaap:FairValueByMeasurementBasis

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRecordedInvestmentPastDue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:ForeclosedAssets

us-gaap:ImpairedFinancingReceivableRecordedInvestment

us-gaap:ImpairedFinancingReceivableRelatedAllowance

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:InterestBearingDepositsInBanks

us-gaap:InterestBearingDomesticDepositBrokered

us-gaap:InterestBearingDomesticDepositTimeDeposits
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:InterestPayableCurrentAndNoncurrent
us-gaap:FairValueByMeasurementBasis

us-gaap:InterestReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:InterestReceivableCurrent
us-gaap:FairValueByMeasurementBasis
us-gaap:InvestmentType
us-gaap:InvestmentOwnedBalanceShares

us-gaap:JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis

us-gaap:LoansAndLeasesReceivableAllowance
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:LoansAndLeasesReceivableGrossCarryingAmount

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome

us-gaap:LoansAndLeasesReceivableNetReportedAmount

us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LoansReceivableHeldForSaleAmount

us-gaap:MortgageLoansInProcessOfForeclosureAmount

us-gaap:NoninterestBearingDepositLiabilities

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherAssets

us-gaap:OtherBorrowings
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis

us-gaap:OtherLiabilities

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

us-gaap:PreferredStockSharesIssued

us-gaap:PreferredStockSharesOutstanding

us-gaap:PreferredStockValue

us-gaap:RealEstateAcquiredThroughForeclosure

us-gaap:RealEstateOwnedValuationAllowance
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:ServicingAsset
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:ServicingAssetAtFairValueAmount
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:SubordinatedDebt
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByMeasurementBasis
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapital
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:TimeDeposits
us-gaap:FairValueByMeasurementBasis

Tables

  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:CommonStockValue ▃▃▄▄▄▆▇██▁338.989338.528352.344351.839351.894374.678377.372389.689389.195324.517
us-gaap:CommonStockSharesIssued ▂▂▄▄▄▇▇██▁21.88018321.89200122.48164322.48074822.49877623.56017923.57972524.15034124.14304421.374816
us-gaap:CommonStockSharesOutstanding ▂▂▄▄▄▇▇██▁21.88018321.89200122.48164322.48074822.49877623.56017923.57972524.15034124.14304421.374816
us-gaap:CommonStockSharesAuthorized ▄▄▄▄▄▄▄▄▄▄500.0500.0500.0500.0500.0500.0500.0500.0500.0500.0
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█21.89122.271NA22.48623.03623.588NA24.14924.10921.365
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOption▄▄0.00.0NA0.00.00.0NA0.00.00.0
us-gaap:EarningsPerShareBasic █▁▇▆▅▄▄▅▃▄0.670.220.61999999999999990.550.470.40.40999999999999990.490.370.43
us-gaap:EarningsPerShareDiluted █▁▇▆▅▄▄▅▃▄0.670.210.60000000000000010.550.460.390.40999999999999990.490.360.42
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▅▆▇▆▄█▇▇▅5.0946.1946.616.8316.516.0027.1326.8926.8246.278
us-gaap:InterestAndFeeIncomeLoansAndLeases ▅▆▇██▇▇▆▅▁29.86331.76433.1434.22633.83632.68132.83831.029.67423.353
us-gaap:InterestExpense ▂▅▇██▇▆▄▃▁3.2925.3886.1986.9396.8176.3935.7524.7554.1232.861
us-gaap:InterestIncomeExpenseNet █▇███▇█▇▆▁30.46230.19130.7130.87230.75630.24330.66929.69728.9823.936
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName ibcp:LongTermIncentivePlan▁█400000.0500000.0NANA400000.0400000.0NANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual ibcp:NonEmployeeDirectors▅▅█▃▃▂▁▂▂▂90000.090000.0120000.060000.060000.050000.040000.050000.050000.050000.0
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▁▇▆▅▄▅▆▄▄18.2955.75517.22515.5713.41711.54812.20414.84610.88411.199
us-gaap:IncomeTaxExpenseBenefit █▁█▇▆▄▅▆▄▄3.5230.9453.3463.1252.6872.1672.2682.9212.0672.038
us-gaap:NetIncomeLoss █▁▇▆▅▄▅▆▄▄14.7724.8113.87912.44510.739.3819.93611.9258.8179.161
us-gaap:ComprehensiveIncomeNetOfTax █▁▄▄▄▄▃▄▃▂23.4223.74213.46613.50313.11612.6729.71711.258.1056.658
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:Assets █▆▅▅▅▄▄▄▃▁4043.3153632.3873564.6943550.8373438.3023383.6063353.2813297.1243234.5222793.119
us-gaap:Liabilities █▆▅▅▅▄▄▄▃▁3688.1923296.7693214.5253210.5923107.4563038.883014.2872951.922897.4392525.202
us-gaap:LiabilitiesAndStockholdersEquity █▁▇▇▇▇▇▇▆▆4043.315362.3873564.6943550.8373438.3023383.6063353.2813297.1243234.5222793.119
us-gaap:StockholdersEquity █▆█▇▆▇▇▇▇▁355.123335.618350.169340.245330.846344.726338.994345.204337.083267.917
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▆▅█▃▆▆▃▄▁55.81670.29165.30482.41755.13771.62370.24453.1758.71142.376
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:PropertyPlantAndEquipmentNet ▁▃▅▂▃▄▆▆█▆36.96237.77638.41137.42437.70337.98538.77739.01239.6638.809
us-gaap:Goodwill ▁▁▁▁▁▁▁▁█28.328.328.328.328.328.328.328.329.012NA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▅▆▆▆▇▇▇██▁4.8165.0715.3265.5985.876.1436.4156.7097.0041.5
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:ConsolidatedEntities ibcp:IndependentBank▁▂▃▄▅▆▇█33.11633.37133.62633.89834.1734.44334.71535.009NANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:ConsolidatedEntities us-gaap:ConsolidatedEntities▁▂▃▄▅▆▇█33.11633.37133.62633.89834.1734.44334.71535.009NANA
us-gaap:OperatingLeaseRightOfUseAsset ▅▇█▁▃▄7422000.07968000.08282000.06244000.06692000.07199000.0NANANANA
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:StockholdersEquity █▆█▇▆▇▇▇▇▁355.123335.618350.169340.245330.846344.726338.994345.204337.083267.917
us-gaap:CommonStockValue ▃▃▄▄▄▆▇██▁338.989338.528352.344351.839351.894374.678377.372389.689389.195324.517
us-gaap:RetainedEarningsAccumulatedDeficit █▇▇▆▅▄▃▃▂▁12.3381.9441.611-8.221-16.617-23.135-28.27-34.596-42.898-48.098
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax █▄▄▄▄▃▁▁▁▂3.796-4.854-3.786-3.373-4.431-6.817-10.108-9.889-9.214-8.502
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁▁▁▁▁█▃▂▄▁0.00.0110.0020.00.00.2820.0650.0550.1340.013
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁█▃▂▄▁0.00.0110.0020.00.00.2820.0650.0550.1340.013
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▇█▁▃▅▇▄▄▄21.67122.28227.92-7.8773.80610.13124.2937.336.416.888
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▇▇▇▇█▇▇██-420.649-58.588-50.047-56.511-52.893-22.191-51.636-66.51-46.938-18.283
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂▁▃▂▁▂▂▂▁384.50341.2935.01491.66832.60113.43944.41753.63956.863-0.967
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▇█▁▃▅▇▄▄▄21.67122.28227.92-7.8773.80610.13124.2937.336.416.888
us-gaap:NetIncomeLoss █▁▇▆▅▄▅▆▄▄14.7724.8113.87912.44510.739.3819.93611.9258.8179.161
us-gaap:ShareBasedCompensation ▄█▆▄▄▂▃▃▃▁462000.0547000.0506000.0460000.0468000.0420000.0438000.0445000.0441000.0407000.0
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▇▇▇▇█▇▇██-420.649-58.588-50.047-56.511-52.893-22.191-51.636-66.51-46.938-18.283
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂█▃▃▁▃▂▃▃893000.0760000.02349000.01045000.01031000.0511000.01050000.0779000.01112000.0921000.0
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂▁▃▂▁▂▂▂▁384.50341.2935.01491.66832.60113.43944.41753.63956.863-0.967
us-gaap:PaymentsOfDividends ▇█▆▆▇▇▃▃▃▁4.3784.4774.0474.0494.2124.2463.6093.6233.6173.206
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▅▁▁█▂▅▁▁▁0.013.7840.00.50223.2522.5312.6810.00.00.0
  2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value338338352351351374377389389324324324324323323323324324339343349351352352351351351350255253251250249248248248248246
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.49.39.99.910.211.111.311.812.011.611.711.812.212.512.712.713.213.014.114.315.315.115.715.715.615.615.916.112.012.012.410.410.410.310.810.710.79.7

None

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value212122222223232424212121212121212121222222222222222222229.4815059.4734629.0937328.8044158.749228.5463428.4915268.4133338.3456517.860483
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value212122222223232424212121212121212121222222222222222222229.4815059.4734629.0937328.8044158.749228.5463428.4915268.4133338.3456517.860483
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CommonStockSharesAuthorized

us-gaap:CommonStockSharesAuthorized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-01-29
Value50050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050050060
Percentage of CommonStockSharesAuthorized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value2122222323242421212121212121222222222222
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value0000000000030000.030000.030000.030000.030000.030000.030000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.670.220.620.550.470.40.410.490.370.430.080.320.280.280.270.30.30.190.250.220.250.160.170.210.260.14-1.160.736.560.511.230.610.380.29-1.16-0.61-0.12-1.06-0.38-1.032.37
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.670.210.60.550.460.390.410.490.360.420.080.320.270.280.270.30.30.190.240.220.240.160.170.210.260.130.150.172.640.270.440.160.110.07-1.16-0.61-0.12-1.06-0.38-1.030.44
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.0946.1946.616.8316.516.0027.1326.8926.8246.278
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers, us-gaap:ProductOrService

ibcp:CustomerBusiness, ibcp:ATMFees


None
Period End2020-06-302019-09-302019-06-302019-03-312018-06-302018-03-31
Value0.0040.0090.0090.0080.0080.008
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerBusiness ibcp:ATMFees100.0100.0100.0100.0100.0100.0

ibcp:CustomerBusiness, ibcp:Other


None
Period End2020-06-302019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0730.0910.0890.1290.1950.1240.1460.129
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.42.12.71.82.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.42.12.71.82.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerBusiness ibcp:Other100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CustomerBusiness, ibcp:OverdraftFees


None
Period End2020-06-302019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.1530.3610.3770.3850.4140.408
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.05.35.86.45.85.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.05.35.86.45.85.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerBusiness ibcp:OverdraftFees100.0100.0100.0100.0100.0100.0

ibcp:CustomerRetail, ibcp:ATMFees


None
Period End2020-06-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.2760.3460.3220.3460.3740.3580.345
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.45.35.44.95.45.25.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.45.35.44.95.45.25.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerRetail ibcp:ATMFees100.0100.0100.0100.0100.0100.0100.0

ibcp:CustomerRetail, ibcp:AccountServiceCharges


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.4510.5060.5430.5410.5160.5380.5190.5880.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.27.98.38.67.57.58.68.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.98.27.98.38.67.57.58.68.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerRetail ibcp:AccountServiceCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CustomerRetail, ibcp:Other


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.1570.2360.240.2120.2510.2850.2190.230.207
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.83.53.34.24.03.23.43.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.13.83.53.34.24.03.23.43.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerRetail ibcp:Other100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CustomerRetail, ibcp:OverdraftFees


None
Period End2020-06-302019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value1.0191.971.8822.1082.1612.0441.972
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.028.828.929.631.430.031.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.028.828.929.631.430.031.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:CustomerRetail ibcp:OverdraftFees100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

ibcp:AssetManagementRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.2890.3130.30.2920.2770.2540.2740.2740.2810.271
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.14.54.34.34.23.84.04.14.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.75.14.54.34.34.23.84.04.14.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:AssetManagementRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:InterchangeIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value2.5262.4572.5532.7852.6042.3552.6692.4862.5042.2461.922
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax49.639.738.640.840.039.237.436.136.735.80.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax49.639.738.640.840.039.237.436.136.735.80.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:InterchangeIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:InvestmentAndInsuranceCommissions


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.4350.5130.4610.450.450.2970.5370.5130.4830.438
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.58.37.06.66.94.97.57.47.17.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.58.37.06.66.94.97.57.47.17.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:InvestmentAndInsuranceCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:OtherDepositRelatedIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.510.6330.7110.7130.6560.710.8340.7270.7420.689
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.010.210.810.410.111.811.710.510.911.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.010.210.810.410.111.811.710.510.911.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:OtherDepositRelatedIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:ServiceChargesOnDeposits


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value1.6232.5912.8852.8832.82.643.0923.1663.0952.9053.009
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.941.843.642.243.044.043.445.945.446.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.941.843.642.243.044.043.445.945.446.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:ServiceChargesOnDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:TransactionBasedRevenue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.1460.20.1610.1580.1730.0430.2630.2390.2020.167
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.22.42.32.70.73.73.53.02.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.22.42.32.70.73.73.53.02.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:TransactionBasedRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:MajorCustomers

ibcp:ATMFees, ibcp:CustomerBusiness


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0070.0090.0090.0080.0080.010.0080.008
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:ATMFees ibcp:CustomerBusiness100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:ATMFees, ibcp:CustomerRetail


None
Period End2020-03-312019-09-302019-06-302018-09-302018-06-302018-03-31
Value0.30.3730.3460.3740.3580.345
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.85.55.35.45.25.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.85.55.35.45.25.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:ATMFees ibcp:CustomerRetail100.0100.0100.0100.0100.0100.0

ibcp:Other, ibcp:CustomerBusiness


None
Period End2020-03-312019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.090.0890.1290.1240.1460.129
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.42.11.82.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.51.42.11.82.12.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:Other ibcp:CustomerBusiness100.0100.0100.0100.0100.0100.0

ibcp:OverdraftFees, ibcp:CustomerBusiness


None
Period End2020-03-312019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.3450.3770.3850.4080.380.365
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.65.86.45.95.65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.65.86.45.95.65.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:OverdraftFees ibcp:CustomerBusiness100.0100.0100.0100.0100.0100.0

ibcp:OverdraftFees, ibcp:CustomerRetail


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.741.971.8821.732.1612.0441.972
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.128.828.928.831.430.031.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax28.128.828.928.831.430.031.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:OverdraftFees ibcp:CustomerRetail100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2931333433323231292322211919181818181817171717171818192020202223232425272829323436
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax586.2512.8501.4501.0519.8544.5460.4449.8434.8372.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestAndFeeIncomeLoansAndLeases us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities

ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram


None
Period End2020-06-302019-06-30
Value1.00.0
Percentage of InterestAndFeeIncomeLoansAndLeases3.30.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax19.60.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram0.00.0

None

us-gaap:InterestExpense

us-gaap:InterestExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.2925.3886.1986.9396.8176.3935.7524.7554.1232.8612.712.4592.0411.9131.9071.7471.6371.5911.5131.4521.431.4611.791.8851.8191.8052.1742.2552.3392.3942.843.2823.4253.5963.7694.4135.7436.2687.3628.7029.921
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.687.093.8101.6104.7106.580.769.060.445.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-0.261-0.075-0.8180.1020.1420.149-0.3690.0730.0530.0060.013
Percentage of InterestExpense-7.9-1.4-13.21.52.12.3-6.41.51.30.20.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-5.1-1.2-12.41.52.22.5-5.21.10.80.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3030303030303029282323222121201919191918181818181818191919192021212222232324262628
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax598.0487.4464.6451.9472.4503.9430.0430.9424.7381.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

us-gaap:AllocatedShareBasedCompensationExpense

ibcp:LongTermIncentivePlan


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value400000.0500000.0400000.0400000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.98.16.16.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:LongTermIncentivePlan0.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual

ibcp:NonEmployeeDirectors


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value90000.090000.0120000.060000.060000.050000.040000.050000.050000.050000.080000.050000.040000.040000.010000.030000.030000.030000.050000.020000.020000.020000.060000.050000.050000.050000.040000.090000.090000.0
Percentage of AllocatedShareBasedCompensationExpense22.518.00.00.015.012.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.81.51.80.90.90.80.60.70.70.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ibcp:NonEmployeeDirectors0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value185.755171513111214101111108.5948.5958.4439.3529.0496.0578.2517.3258.2435.5615.4387.2747.8994.6056.133.7876.8995.842116.4464.3333.504-8.178-4.604-0.221-7.409-4.65-7.5888.04
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax359.192.9260.6227.9206.1192.4171.1215.4159.5178.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value0.00.2530.00.1370.0-0.0260.0110.1060.00.00.00.0750.1120.002
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments0.04.40.01.20.0-0.20.11.20.00.00.01.31.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.04.10.02.30.0-0.40.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.5230.9453.3463.1252.6872.1672.2682.9212.0672.0389.523.1592.6632.6212.5882.9792.6111.9572.6812.2782.6241.781.5362.3451.8471.4671.3210.282-56.4890.0350.00.00.00.00.536-0.482-0.258-0.008-0.504-0.9780.156
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax69.215.350.645.741.336.131.842.430.332.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0550.016-0.006-0.022-0.03-0.031-0.022-0.016-0.011-0.0010.008
Percentage of IncomeTaxExpenseBenefit1.61.7-0.2-0.7-1.1-1.4-1.0-0.5-0.5-0.00.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.3-0.1-0.3-0.5-0.5-0.3-0.2-0.2-0.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value0.00.0530.00.0290.0-0.0050.0040.0370.00.00.00.0260.0390.001
Percentage of IncomeTaxExpenseBenefit0.05.60.01.30.0-0.20.21.40.00.00.01.51.70.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.90.00.50.0-0.10.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value144.811312109.3819.936118.8179.1611.7116.8595.9315.9745.8556.3736.4384.15.575.0475.6193.7813.9024.9296.0523.1384.8093.505635.807116.4464.3333.504-8.714-4.1220.037-7.401-4.146-6.617.884
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax290.077.7210.0182.2164.8156.3139.3173.0129.2145.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value-0.2060.1410.0290.080.1120.2260.1630.0570.021-0.010.050.0020.0720.011-0.06-0.061-0.062-1.49
Percentage of NetIncomeLoss-1.42.90.20.61.02.41.60.50.2-0.12.90.01.80.2-1.0-1.3-1.8-2.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.02.30.41.21.73.82.30.80.3-0.20.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2060.059-0.026-0.08-0.112-0.118-0.083-0.057-0.042-0.0050.015
Percentage of NetIncomeLoss1.41.2-0.2-0.6-1.0-1.3-0.8-0.5-0.5-0.10.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.01.0-0.4-1.2-1.7-2.0-1.2-0.8-0.6-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value0.00.20.00.1080.0-0.0210.0070.0690.00.00.00.0490.0730.001
Percentage of NetIncomeLoss0.04.20.01.20.0-0.20.11.20.00.00.01.31.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.03.20.01.80.0-0.30.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value144.811312109.3819.936118.8179.161
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax290.077.7210.0182.2164.8156.3139.3173.0129.2145.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value233.742131313129.717118.1056.658-0.5957.0148.6558.246-0.2386.6417.9545.3374.035.9414.4315.2154.3495.1447.3984.7394.7341.605636.912128.0287.3842.36
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax459.860.4203.7197.7201.5211.1136.2163.2118.8106.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:Assets

us-gaap:Assets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value40433632356435503438338333533297323427932789275326652596254825382452248724092394228823292248223922492259220921832134210520232400240324192307231723172535
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:Liabilities

us-gaap:Liabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value36883296321432103107303830142951289725252524248524022341229922872205224721572141203420751998199220062023197819561925196118882279229023142204220622032416
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets91.290.890.290.490.489.889.989.589.690.490.590.390.290.290.290.189.990.489.689.488.989.188.989.089.289.589.589.690.293.293.394.995.395.795.695.295.195.3

None

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4043362356435503438338333533297323427932789275326652596254825382452248724092394228823292248223922492259220921832134210520232400240324192307231723172535
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.010.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value355335350340330344338345337267264267262255248250246239251252254253250247242236231226208144134121113105102110114112119125129109194
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.89.29.89.69.610.210.110.510.49.69.59.79.89.89.89.910.19.610.410.611.110.911.111.010.810.510.510.49.86.86.75.14.74.34.44.84.90.04.70.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

ibcp:IndependentBank


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value378362366360354347341343343276269267258
Percentage of StockholdersEquity106.5108.1104.8106.1107.0100.9100.799.5101.9103.3101.799.9103.9
Percentage of Assets9.410.010.310.210.310.310.210.410.69.99.79.710.2
Percentage of Assets ibcp:IndependentBank0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidatedEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value355335350340330344338345337267264267248
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.89.29.89.69.610.210.110.510.49.69.59.79.8
Percentage of Assets us-gaap:ConsolidatedEntities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-1.721-1.989-1.727-1.811-1.673-0.962-0.1251.2711.0210.8050.2690.0650.00.00.00.0
Percentage of StockholdersEquity-0.5-0.6-0.5-0.5-0.5-0.3-0.00.40.30.30.10.00.00.00.00.0
Percentage of Assets-0.0-0.1-0.0-0.1-0.0-0.0-0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value112.9333.7394.2363.04-0.057-4.185-5.362-4.437-3.509-0.472.0761.986-0.738-3.312.7832.5150.999-0.2381.3020.4081.5960.162-0.223-0.376-3.2-0.335
Percentage of StockholdersEquity3.20.91.11.20.9-0.0-1.2-1.6-1.3-1.3-0.20.80.8-0.3-1.31.11.00.4-0.10.50.20.60.1-0.1-0.2-1.4-0.2
Percentage of Assets0.30.10.10.10.1-0.0-0.1-0.2-0.1-0.1-0.00.10.1-0.0-0.10.10.10.0-0.00.10.00.10.0-0.0-0.0-0.1-0.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3.796-4.854-3.786-3.373-4.431-6.817-10.108-9.889-9.214-8.502-5.999-3.657-3.812-6.536-9.108-3.015-3.283-4.799-6.036-4.496-5.39-4.202-5.636-6.083-6.298-9.245-8.058-11.921-13.12-15.679-23.208
Percentage of StockholdersEquity1.1-1.4-1.1-1.0-1.3-2.0-3.0-2.9-2.7-3.2-2.3-1.4-1.5-2.6-3.7-1.2-1.3-2.0-2.4-1.8-2.1-1.7-2.3-2.5-2.6-4.0-6.0-11.6-11.0-14.3-11.9
Percentage of Assets0.1-0.1-0.1-0.1-0.1-0.2-0.3-0.3-0.3-0.3-0.2-0.1-0.1-0.3-0.4-0.1-0.1-0.2-0.3-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.5-0.50.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3383383523513513743773893893243243233393523512512482462.3862.279
Percentage of StockholdersEquity95.5100.9100.6103.4106.4108.7111.3112.9115.5121.1122.7130.0135.2140.8151.6186.1242.6206.92.21.2
Percentage of Assets8.49.39.99.910.211.111.311.812.011.611.712.714.115.715.912.410.89.70.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value121.9441.611-8.221-16.617-23.135-28.27-34.597-42.899-48.099-54.054-65.657-82.334-96.455-110.347-192.408-214.259-189.902-169.098-73.849
Percentage of StockholdersEquity3.50.60.5-2.4-5.0-6.7-8.3-10.0-12.7-18.0-20.4-26.4-32.8-38.5-47.6-142.6-208.8-159.5-153.9-37.9
Percentage of Assets0.30.10.0-0.2-0.5-0.7-0.8-1.0-1.3-1.7-1.9-2.6-3.4-4.3-5.0-9.5-9.3-7.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value557065825571705358425447596983114611448510558101746510513111913014022117946041935234135532038738543435528857
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.91.82.31.62.12.11.61.81.52.01.72.22.73.34.52.55.83.64.42.54.43.32.94.75.85.46.06.610.58.919.217.514.614.815.413.80.015.20.00.00.00.0

None

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3637383737373839393839383939404041424343444545464647484747474747506362646568
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.01.11.11.11.11.21.21.21.41.41.41.51.51.61.61.71.71.81.81.91.92.02.12.12.12.22.22.22.32.32.02.12.62.72.82.82.7

None

us-gaap:Goodwill

us-gaap:Goodwill


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2828282828282828290.0
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.70.80.80.80.80.80.80.90.90.0

None

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4.8165.0715.3265.5985.876.1436.4156.7097.0041.51.5861.6731.7591.8451.9322.0192.1062.1932.282.3662.4532.542.6272.7612.8953.0293.1633.3663.5693.7723.9756.7937.0657.3377.6097.9518.2948.98
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.20.20.20.20.20.20.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.30.30.30.30.30.40.4

None

us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:ConsolidatedEntities

us-gaap:IntangibleAssetsNetIncludingGoodwill

ibcp:IndependentBank


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value33333333343434351.269
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.90.91.01.01.01.01.10.0
Percentage of Assets ibcp:IndependentBank0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidatedEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value33333333343434351.269
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.90.91.01.01.01.01.10.0
Percentage of Assets us-gaap:ConsolidatedEntities0.00.00.00.00.00.00.00.00.0

None

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value7422000.07968000.08282000.06244000.06692000.07199000.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.2

None

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value355335350340330344338345337267264267262255248250246239251252254253250247242236231226208144134121113105102110114112119125129109194
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.89.29.89.69.610.210.110.510.49.69.59.79.89.89.89.910.19.610.410.611.110.911.111.010.810.510.510.49.86.86.75.14.74.34.44.84.90.04.70.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

ibcp:IndependentBank


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value378362366360354347341343343276269267258
Percentage of StockholdersEquity106.5108.1104.8106.1107.0100.9100.799.5101.9103.3101.799.9103.9
Percentage of Assets9.410.010.310.210.310.310.210.410.69.99.79.710.2
Percentage of Assets ibcp:IndependentBank0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidatedEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value355335350340330344338345337267264267248
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.89.29.89.69.610.210.110.510.49.69.59.79.8
Percentage of Assets us-gaap:ConsolidatedEntities0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-1.721-1.989-1.727-1.811-1.673-0.962-0.1251.2711.0210.8050.2690.0650.00.00.00.0
Percentage of StockholdersEquity-0.5-0.6-0.5-0.5-0.5-0.3-0.00.40.30.30.10.00.00.00.00.0
Percentage of Assets-0.0-0.1-0.0-0.1-0.0-0.0-0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value112.9333.7394.2363.04-0.057-4.185-5.362-4.437-3.509-0.472.0761.986-0.738-3.312.7832.5150.999-0.2381.3020.4081.5960.162-0.223-0.376-3.2-0.335
Percentage of StockholdersEquity3.20.91.11.20.9-0.0-1.2-1.6-1.3-1.3-0.20.80.8-0.3-1.31.11.00.4-0.10.50.20.60.1-0.1-0.2-1.4-0.2
Percentage of Assets0.30.10.10.10.1-0.0-0.1-0.2-0.1-0.1-0.00.10.1-0.0-0.10.10.10.0-0.00.10.00.10.0-0.0-0.0-0.1-0.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3.796-4.854-3.786-3.373-4.431-6.817-10.108-9.889-9.214-8.502-5.999-3.657-3.812-6.536-9.108-3.015-3.283-4.799-6.036-4.496-5.39-4.202-5.636-6.083-6.298-9.245-8.058-11.921-13.12-15.679-23.208
Percentage of StockholdersEquity1.1-1.4-1.1-1.0-1.3-2.0-3.0-2.9-2.7-3.2-2.3-1.4-1.5-2.6-3.7-1.2-1.3-2.0-2.4-1.8-2.1-1.7-2.3-2.5-2.6-4.0-6.0-11.6-11.0-14.3-11.9
Percentage of Assets0.1-0.1-0.1-0.1-0.1-0.2-0.3-0.3-0.3-0.3-0.2-0.1-0.1-0.3-0.4-0.1-0.1-0.2-0.3-0.2-0.2-0.2-0.3-0.3-0.3-0.4-0.4-0.5-0.50.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3383383523513513743773893893243243233393523512512482462.3862.279
Percentage of StockholdersEquity95.5100.9100.6103.4106.4108.7111.3112.9115.5121.1122.7130.0135.2140.8151.6186.1242.6206.92.21.2
Percentage of Assets8.49.39.99.910.211.111.311.812.011.611.712.714.115.715.912.410.89.70.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value121.9441.611-8.221-16.617-23.135-28.27-34.597-42.899-48.099-54.054-65.657-82.334-96.455-110.347-192.408-214.259-189.902-169.098-73.849
Percentage of StockholdersEquity3.50.60.5-2.4-5.0-6.7-8.3-10.0-12.7-18.0-20.4-26.4-32.8-38.5-47.6-142.6-208.8-159.5-153.9-37.9
Percentage of Assets0.30.10.0-0.2-0.5-0.7-0.8-1.0-1.3-1.7-1.9-2.6-3.4-4.3-5.0-9.5-9.3-7.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:CommonStockValue

us-gaap:CommonStockValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value338338352351351374377389389324324324324323323323324324339343349351352352351351351350255253251250249248248248248246
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.49.39.99.910.211.111.311.812.011.611.711.812.212.512.712.713.213.014.114.315.315.115.715.715.615.615.916.112.012.012.410.410.410.310.810.710.79.7

None

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value121.9441.611-8.221-16.617-23.135-28.27-34.596-42.898-48.098-54.054-53.24-57.966-61.764-65.657-69.386-74.062-79.984-82.334-86.125-89.815-94.054-96.455-98.979-102.532-107.209-110.347-115.155-125.464-187.698-192.408-203.217-208.569-211.811-214.259-204.491-199.326-189.902
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.10.0-0.2-0.5-0.7-0.8-1.0-1.3-1.7-1.9-1.9-2.2-2.4-2.6-2.7-3.0-3.2-3.4-3.6-3.9-4.0-4.3-4.4-4.6-4.7-5.0-5.3-5.9-8.9-9.5-8.5-8.7-8.8-9.3-8.8-8.6-7.5

None

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3.796-4.854-3.786-3.373-4.431-6.817-10.108-9.889-9.214-8.502-5.999-3.657-3.812-6.536-9.108-3.015-3.283-4.799-6.036-4.496-5.39-4.202-5.636-6.083-6.298-7.644-9.245-9.17-7.27-6.953-8.058-8.432-10.014-13.065-11.921-12.014-12.19-13.12
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.1-0.1-0.1-0.1-0.1-0.2-0.3-0.3-0.3-0.3-0.2-0.1-0.1-0.3-0.4-0.1-0.1-0.2-0.3-0.2-0.2-0.2-0.3-0.3-0.3-0.3-0.4-0.4-0.3-0.3-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.5

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

ibcp:IndependentBank


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value-9.593-0.943-2.011-2.424-1.3661.024.3114.0923.4172.7050.201-2.143.31
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-252.719.453.171.930.8-15.0-42.6-41.4-37.1-31.8-3.458.5-36.3
Percentage of Assets-0.2-0.0-0.1-0.1-0.00.00.10.10.10.10.0-0.10.1
Percentage of Assets ibcp:IndependentBank0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidatedEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value-9.593-0.943-2.011-2.424-1.3661.024.3114.0923.4172.7050.201-2.143.31
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-252.719.453.171.930.8-15.0-42.6-41.4-37.1-31.8-3.458.5-36.3
Percentage of Assets-0.2-0.0-0.1-0.1-0.00.00.10.10.10.10.0-0.10.1
Percentage of Assets us-gaap:ConsolidatedEntities0.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-08-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.0110.0020.00.00.2820.0650.0550.1340.0130.0150.00.0320.0250.0210.0050.0240.0320.0090.0230.0640.0160.0310.0290.0260.0110.0113890.0041.9620.8610.060.4970.00.00.00.4890.8460.4610.0
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.0110.0020.00.00.2820.0650.0550.1340.013
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0100.00.00.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value212227-7.8773.80610247.336.416.88832-6.8359.6693.37910-1.924-1.890.7977.361104.957171818-11.4939.02113-3.2770.972.9643412-23.812
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax425.4359.7422.4-115.358.5168.8340.6106.493.9109.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-420.649-58.588-50.047-56.511-52.893-22.191-51.636-66.51-46.938-18.283-58.195-91.014-76.814-51.555-56.517-20.151-23.949-8.178-43.876-47.036-62.277-64.202-47.553-296.9535170-99.621-13.26329911813099
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-8257.7-945.9-757.1-827.3-812.5-369.7-724.0-965.0-687.8-291.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value384415.014913213445356-0.967328557341475-14.21-19.022492447-34.97970-2.3310.511-13.023981.8444.11-161.97-51.113-192.753.25
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7548.2666.775.91341.9500.8223.9622.8778.3833.3-15.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value212227-7.8773.80610247.336.416.88832-6.8359.6693.37910-1.924-1.890.7977.361104.957171818-11.4939.02113-3.2770.972.9643412-23.812
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax425.4359.7422.4-115.358.5168.8340.6106.493.9109.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value144.811312109.3819.936118.8179.1611.7116.8595.9315.9745.8556.3736.4384.15.575.0475.6193.7813.9024.9296.0523.1384.8093.505635.807116.4464.3333.504-8.714-4.1220.037-7.401-4.146-6.617.884
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax290.077.7210.0182.2164.8156.3139.3173.0129.2145.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value-0.2060.1410.0290.080.1120.2260.1630.0570.021-0.010.050.0020.0720.011-0.06-0.061-0.062-1.49
Percentage of NetIncomeLoss-1.42.90.20.61.02.41.60.50.2-0.12.90.01.80.2-1.0-1.3-1.8-2.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.02.30.41.21.73.82.30.80.3-0.20.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2060.059-0.026-0.08-0.112-0.118-0.083-0.057-0.042-0.0050.015
Percentage of NetIncomeLoss1.41.2-0.2-0.6-1.0-1.3-0.8-0.5-0.5-0.10.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.01.0-0.4-1.2-1.7-2.0-1.2-0.8-0.6-0.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value0.00.20.00.1080.0-0.0210.0070.0690.00.00.00.0490.0730.001
Percentage of NetIncomeLoss0.04.20.01.20.0-0.20.11.20.00.00.01.31.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.03.20.01.80.0-0.30.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value144.811312109.3819.936118.8179.161
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax290.077.7210.0182.2164.8156.3139.3173.0129.2145.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.0

None

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value462000.0547000.0506000.0460000.0468000.0420000.0438000.0445000.0441000.0407000.0406000.0426000.0484000.0432000.0420000.0375000.0415000.0410000.0324000.0381000.0399000.0373000.0301000.0310000.0326000.0255000.0236000.0575000.0191000.0236000.0297000.0268000.0259000.045000.0446000.0307000.0302000.0153000.0127000.0123000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-420.649-58.588-50.047-56.511-52.893-22.191-51.636-66.51-46.938-18.283-58.195-91.014-76.814-51.555-56.517-20.151-23.949-8.178-43.876-47.036-62.277-64.202-47.553-296.9535170-99.621-13.26329911813099
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-8257.7-945.9-757.1-827.3-812.5-369.7-724.0-965.0-687.8-291.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value893000.0760000.02349000.01045000.01031000.0511000.01050000.0779000.01112000.0921000.01650000.0688000.01224000.0680000.01742000.0727000.0379000.0611000.01429000.01027000.0923000.0975000.01638000.01054000.0642000.0964000.02379000.02111000.01762000.02119000.01518000.0518000.0430000.02827000.0433000.0570000.0797000.0757000.01354000.01058000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value384415.014913213445356-0.967328557341475-14.21-19.022492447-34.97970-2.3310.511-13.023981.8444.11-161.97-51.113-192.753.25
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7548.2666.775.91341.9500.8223.9622.8778.3833.3-15.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

None

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value4.3784.4774.0474.0494.2124.2463.6093.6233.6173.2062.562.1342.1332.1332.1251.6981.7011.751.7781.3581.3781.3821.3771.3771.3750.00.00.0
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

None

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.0130.00.502232.53120.00.00.00.00.00.00.00.01.3440.0154.4735.3572.7660.9020.00.00.00.0
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.00.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.00.00.00.00.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:EmployeeStockOption


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value126590.0126940.0138510.0140010.0142460.0142460.0211420.0250420.0258760.0172260.0176060.0182060.0184790.0195030.0211020.0215720.0218520.0224880.0235600.0246350.0254760.0274760.0281820.0292590.0304370.0320300.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:EmployeeStockOption


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value4.724.714.624.64.664.666.486.986.985.285.245.215.235.125.055.045.025.014.944.854.84.734.694.644.564.52
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

ibcp:NonVestedRestrictedStockAndPerformanceStockUnits


None
Period End2020-06-302020-03-31
Value073893.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType, us-gaap:PlanName

us-gaap:RestrictedStock, ibcp:LongTermIncentivePlan


None
Period End2020-06-302019-06-302019-03-31
Value03551.052716.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:PlanName, us-gaap:AwardType

ibcp:LongTermIncentivePlan, us-gaap:PerformanceShares


None
Period End2020-03-312019-03-31
Value20897.022016.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod28.30.0

ibcp:LongTermIncentivePlan, us-gaap:RestrictedStock


None
Period End2020-03-31
Value52996.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod71.7

None

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312010-12-312009-12-31
Value400000.0400000.0438000.0600000.0600000.0600000.0588000.0700000.0700000.0700000.0724000.0800000.0800000.0800000.0840000.01000000.01000000.01000000.0976000.01000000.01000000.01100000.01091000.01100000.01100000.01700000.01672000.01700000.01600000.01900000.01871000.02100000.02100000.02100000.02393000.01981000.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

None

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value5570658255717053585483
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR

ibcp:AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value000000000050000.0000510000.0000000000000020000.00400000.0100000.0200000.0400000.0300000.0100000.0
Percentage of AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR0.00.00.00.00.00.00.00.00.00.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0

ibcp:ConservationBufferPercentagePointsAddedToMinimumRatioForAdequatelyCapitalizedInstitutions

ibcp:ConservationBufferPercentagePointsAddedToMinimumRatioForAdequatelyCapitalizedInstitutions


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.0250000.025
Percentage of ConservationBufferPercentagePointsAddedToMinimumRatioForAdequatelyCapitalizedInstitutions100.00.00.00.0100.0

ibcp:CreditRelatedOTTIRecognizedInEarnings

ibcp:CreditRelatedOTTIRecognizedInEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value0000000000000000000001000.09000.04000.0
Percentage of CreditRelatedOTTIRecognizedInEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0

ibcp:DataProcessing

ibcp:DataProcessing


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1590000.02355000.02308000.02282000.02171000.02144000.02082000.02051000.02251000.01878000.01987000.01796000.01937000.01937000.01944000.01971000.01936000.02101000.01986000.02001000.02027000.01930000.01879000.01790000.01777000.02086000.01971000.02090000.02042000.01916000.0728000.02492000.02450000.02339000.02524000.02502000.02415000.02310000.02367000.02248000.02470000.0
Percentage of DataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:DepositorAccountsFeesAndCommissions

ibcp:DepositorAccountsFeesAndCommissions


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.6232.5912.8852.8832.82.643.0923.1663.0952.9053.2083.2813.175
Percentage of DepositorAccountsFeesAndCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:ImpairmentCollateralDependentOtherThanRealEstate us-gaap:FinancialInstrument

ibcp:ImpairmentCollateralDependentOtherThanRealEstate

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value-40000.0250000.0-100000.0200000.0
Percentage of ImpairmentCollateralDependentOtherThanRealEstate100.0100.0100.0100.0

ibcp:InterchangeExpense

ibcp:InterchangeExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value726000.0859000.0883000.0891000.0753000.0688000.0728000.0715000.0661000.0598000.0287000.0294000.0292000.0283000.0302000.0276000.0267000.0266000.0266000.0279000.0289000.0291000.0179000.0368000.0342000.0402000.0407000.0410000.0418000.0410000.0478000.0468000.0447000.0406000.0
Percentage of InterchangeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:InterchangeIncome

ibcp:InterchangeIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.5262.4572.5532.7852.6042.3552.6692.4862.5042.2462.1541.9422.0051.9222.1411.9431.9761.8781.932.1692.242.1422.1721.9842.0671.9411.821.8521.9331.7572.1352.3242.4072.3222.2592.3562.3082.1682.162.0752.086
Percentage of InterchangeIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:LoanAndCollection

ibcp:LoanAndCollection


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.7560.8050.7090.7140.6280.6340.7820.5310.6920.6770.6660.4810.670.4130.5480.5680.5710.8250.6710.8160.9671.1551.1091.3911.4271.4651.3741.5841.7022.2261.8362.8322.4072.892.3092.6583.583.8673.9473.8052.785
Percentage of LoanAndCollection100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:LoansHeldForSaleUnrealizedGainLoss

ibcp:LoansHeldForSaleUnrealizedGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value864000.0523000.0-185000.0245000.0481000.096000.0533000.0-487000.0520000.0-153000.0-306000.047000.085000.0581000.0
Percentage of LoansHeldForSaleUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:LoansHeldForSaleUnrealizedGainLoss us-gaap:FinancialInstrument

ibcp:Family14


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value864000.0523000.0-185000.0245000.0481000.096000.0533000.0-487000.0520000.0-153000.0-306000.047000.085000.0581000.0
Percentage of LoansHeldForSaleUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:MortgageLoanServicingIncome

ibcp:MortgageLoanServicingIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-3022000.0-5300000.01348000.0-1562000.0-1907000.0-1215000.0-1511000.01212000.01235000.02221000.0979000.01000.0-158000.0
Percentage of MortgageLoanServicingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments

ibcp:NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value159222.166086657290
Percentage of NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:NoninterestIncomeOtherOperatingIncomeOther

ibcp:NoninterestIncomeOtherOperatingIncomeOther


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value388000.0747000.0950000.01028000.0730000.01015000.0838000.0657000.0772000.0560000.0
Percentage of NoninterestIncomeOtherOperatingIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax

ibcp:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value88000.0-169000.0-10000.0-53000.00-2000.0-36000.0-14000.0-2000.0-1000.0-25000.0126000.0107000.0-22000.0-7000.0-24000.0107000.0-36000.0010000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

ibcp:ProceedsFromSaleOfEquitySecurities

ibcp:ProceedsFromSaleOfEquitySecurities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value00000560000.00000
Percentage of ProceedsFromSaleOfEquitySecurities0.00.00.00.00.0100.00.00.00.00.0

ibcp:ProvisionForLossReimbursementOnSoldLoans

ibcp:ProvisionForLossReimbursementOnSoldLoans


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value80000.040000.050000.030000.030000.0110000.0-70000.050000.020000.010000.0100000.020000.020000.030000.0045000.00-15000.00-35000.045000.0-69000.00015000.0-481000.0-284000.01417000.0356000.0663000.0361000.0193000.0126000.0432000.0973000.0251000.0363000.0406000.0
Percentage of ProvisionForLossReimbursementOnSoldLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:PurchaseOfSecuritiesAvailableForSaleNotYetSettled

ibcp:PurchaseOfSecuritiesAvailableForSaleNotYetSettled


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-8.04710-3.0752.43-0.8551.5-1.01.0-3.223.22-0.765-2.601-1.686.046-5.8585.098-18.98721-7.7177.717-3.1543.154-1.5621.8270.00.00.330.6050.6462.5650.00.0-10.81710
Percentage of PurchaseOfSecuritiesAvailableForSaleNotYetSettled100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.0100.0100.0

ibcp:SecuritizationOfPortfolioLoans

ibcp:SecuritizationOfPortfolioLoans


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.026350.00.029100.00.00.0
Percentage of SecuritizationOfPortfolioLoans0.0100.0100.00.00.0100.0100.00.00.00.0

ibcp:ServicingAssetUnrealizedGainLoss

ibcp:ServicingAssetUnrealizedGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4667000.0-6974000.0-274000.0-3145000.0-3422000.0-2691000.0-3017000.0-198000.0-137000.01029000.0-159000.0-1090000.0-1231000.0-264000.0
Percentage of ServicingAssetUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:ServicingAssetUnrealizedGainLoss us-gaap:FinancialInstrument

ibcp:CapitalizedMortgageLoanServicingRights


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-4667000.0-6974000.0-274000.0-3145000.0-3422000.0-2691000.0-3017000.0-198000.0-137000.01029000.0-159000.0-1090000.0-1231000.0-264000.0
Percentage of ServicingAssetUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:SharesIssuesInPlaceOfRetainerFees us-gaap:TitleOfIndividual

ibcp:SharesIssuesInPlaceOfRetainerFees

srt:Director


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value7000.04000.02000.03000.02000.03000.03000.02000.0
Percentage of SharesIssuesInPlaceOfRetainerFees100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors

ibcp:StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value109000.0122000.01000.0132000.0128000.0130000.02000.0129000.0126000.0125000.01000.0121000.0119000.0119000.00116000.0114000.0113000.01000.0112000.0111000.0111000.00109000.0107000.0120000.0-121880.0128000.0123000.0117.0-53934.081000.058000.026.0-6993.07000.07000.0
Percentage of StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:WeightedAverageNumberOfPerformanceSharesStock

ibcp:WeightedAverageNumberOfPerformanceSharesStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value29000.037000.03000.042000.037000.040000.01000.055000.051000.049000.03000.059000.054000.060000.06000.052000.041000.00000
Percentage of WeightedAverageNumberOfPerformanceSharesStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-31
Value1000.0590000.03000.013000.00866000.0140000.06000.0433000.0888000.043000.049000.060000.0427000.000561000.066000.02182000.0-1025000.00-66000.00000
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1000.0590000.03000.013000.00866000.0140000.06000.0433000.0888000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

us-gaap:AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value6.8991714-20.322-6.9240.7514-4.595-2.407-2.27330-13.6943.929-2.7865.022-7.7693.0310.933-1.0956.7314.473-6.0912.901-6.819-5.2554.2235.911.452-45.462126.607-17.9394.6889.8395.4375.0922.9274216-17.202
Percentage of AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdvertisingExpense

us-gaap:AdvertisingExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value364000.0683000.0515000.0636000.0627000.0672000.0577000.0594000.0543000.0441000.0354000.0526000.0519000.0506000.0446000.0455000.0478000.0477000.0783000.0406000.0448000.0484000.0646000.0427000.0601000.0519000.0552000.0652000.0659000.0570000.0652000.0647000.0639000.0556000.0539000.0740000.0670000.0554000.0567000.0692000.0674000.0
Percentage of AdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease

us-gaap:AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-20000.0270000.0410000.040000.040000.010000.0-196000.0-10000.040000.0-30000.020000.020000.0050000.0-790000.0340000.0060000.0350000.0-50000.0100000.030000.00200000.0-100000.030000.0-100000.030000.0100000.0
Percentage of AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value090000.0-50000.070000.00120000.060000.040000.0020000.060000.030000.030000.020000.0190000.0370000.040000.0200000.0030000.0220000.0200000.0-100000.0300000.030000.03100000.0-700000.00-1700000.05300000.013300000.0-14000000.0
Percentage of AssetImpairmentCharges0.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BankOwnedLifeInsuranceIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value265000.0270000.0298000.0301000.0270000.0242000.0257000.0237000.0220000.0256000.0
Percentage of BankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-14.4754.987-17.11327-16.4861.37917-5.541
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion us-gaap:BusinessAcquisition

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion

ibcp:TCSBBancorpInc


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value35000.032000.053000.056000.039000.039000.039000.032000.035000.0000
Percentage of CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions us-gaap:BusinessAcquisition

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions

ibcp:TCSBBancorpInc


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00000000568000.0000
Percentage of CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAdditions0.00.00.00.00.00.00.00.0100.00.00.00.0

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference us-gaap:BusinessAcquisition

us-gaap:CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference

ibcp:TCSBBancorpInc


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00000365000.0000000
Percentage of CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference0.00.00.00.00.0100.00.00.00.00.00.00.0

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CommonStockDividendsPerShareDeclared


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.20.20.180.180.180.180.150.150.150.150.120.10.10.10.10.080.080.080.080.060.060.060.060.060.060000000000000000
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:Communication

us-gaap:Communication


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value800000.0803000.0728000.0733000.0717000.0769000.0737000.0727000.0704000.0680000.0638000.0685000.0678000.0683000.0862000.0670000.0722000.0888000.0773000.0754000.0694000.0736000.0714000.0712000.0711000.0789000.0714000.0695000.0730000.0780000.0783000.0785000.0826000.0875000.0852000.0863000.0889000.0948000.0996000.01054000.01015000.0
Percentage of Communication100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-06-302019-03-312018-09-302018-06-30
Value0253000.00137000.00-26000.0
Percentage of DebtAndEquitySecuritiesRealizedGainLoss0.0100.00.0100.00.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0253000.079000.000169000.0111000.005000.076000.093000.08000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGain0.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0076000.00032000.010000.0031000.095000.03000.00
Percentage of DebtSecuritiesAvailableForSaleRealizedLoss0.00.0100.00.00.0100.0100.00.0100.0100.0100.00.0

us-gaap:DepreciationAmortizationAndAccretionNet

us-gaap:DepreciationAmortizationAndAccretionNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2.3291.7951.6321.5211.4271.4791.4731.3681.3731.8191.8781.961.841.2791.3851.3241.2011.3061.2081.1171.0491.1791.1580.8370.6460.373-0.029-0.433-0.695-1.04-1.186-1.181-1.038-1.313-1.998-15.74510-3.736-4.66-39.985
Percentage of DepreciationAmortizationAndAccretionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:InterestRateCap, us-gaap:CashFlowHedging, us-gaap:InterestExpense


None
Period End2020-06-302019-06-302019-03-312017-12-312017-09-30
Value-180000.0115000.0118000.000
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.00.00.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation, us-gaap:TradingActivityByType

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:InterestExpense, us-gaap:FixedIncomeInterestRate


None
Period End2020-06-302019-06-30
Value-81000.027000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet45.023.5

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-261000.0-75000.032000.0102000.0142000.0149000.0105000.073000.053000.06000.0-13000.0-5000.00000
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet145.00.00.00.0123.5126.30.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType, us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:CashFlowHedging, us-gaap:FixedIncomeInterestRate, us-gaap:InterestRateSwap, us-gaap:InterestExpense


None
Period End2020-03-31
Value-22000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:IncomeStatementLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:InterestExpense, us-gaap:InterestRateCap, us-gaap:CashFlowHedging


None
Period End2020-03-312018-06-302018-03-31
Value-53000.045000.07000.0
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet0.00.00.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-30
Value4.3784.4774.0474.0494.2124.2463.6093.6233.6173.2062.562.1342.1332.133-2.125-1.698-1.701-1.75-1.778-1.358-1.378-1.382-1.377-1.377-1.3750.00.0
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.3784.4774.0474.0494.2124.2463.6093.6233.6173.206
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0-200000.0-10000.00-200000.010000.0100000.0-200000.020000.0100000.0
Percentage of EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount0.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense us-gaap:TitleOfIndividual

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

ibcp:NonEmployeeDirectors


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value20000.0200000.010000.010000.010000.010000.010000.010000.010000.010000.020000.020000.010000.010000.010000.010000.010000.010000.010000.010000.010000.010000.050000.020000.020000.020000.0000
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions

us-gaap:EmployeeStockOption


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1000.044000.06000.06000.00176000.0106000.032000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:EquipmentExpense

us-gaap:EquipmentExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1090000.01036000.01055000.01023000.01006000.01029000.01051000.01043000.01019000.0967000.0927000.0961000.01005000.0977000.0973000.0990000.0965000.0984000.0977000.0998000.0965000.0952000.01010000.01005000.01053000.01069000.01122000.01051000.01088000.01032000.01248000.01194000.01307000.01294000.01307000.01308000.01502000.01418000.01582000.01591000.01648000.0
Percentage of EquipmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss us-gaap:FairValueByLiabilityClass

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

ibcp:CapitalizedMortgageLoanServicingRights


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-4667000.0-6974000.0-274000.0-3145000.0-3422000.0-2691000.0-3017000.0-198000.0-137000.01029000.0-159000.0-1090000.0-1231000.0-264000.00000
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

ibcp:CapitalizedMortgageLoanServicingRights


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-4667000.0-6974000.0-274000.0-3145000.0-3422000.0-2691000.0-3017000.0-198000.0-137000.01029000.0-159000.0-1090000.0-1231000.0-264000.00000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements us-gaap:FairValueByLiabilityClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements

ibcp:CapitalizedMortgageLoanServicingRights


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3611000.02632000.02539000.02157000.01407000.01200000.01266000.01501000.04202000.01055000.01183000.01250000.01019000.0778000.00000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value430000.0370000.0-38000.013000.0342000.0368000.0331000.0270000.0250000.0230000.0286000.0208000.0202000.0198000.0197000.0187000.0331000.0334000.0322000.0350000.0351000.0343000.0332000.0396000.0422000.0417000.0409000.0685000.0711000.0630000.0817000.0816000.0816000.0857000.0735000.0885000.0652000.01235000.01589000.01651000.01763000.0
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1355000.0399000.0852000.01652000.0889000.0568000.0854000.01908000.0846000.01014000.01207000.01212000.0657000.01129000.0996000.0905000.01759000.0959000.01604000.01173000.01255000.0990000.01982000.01479000.02891000.01068000.01377000.01484000.03958000.01451000.01919000.01372000.01351000.01880000.01667000.0898000.01247000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value207000.0174000.0260000.0202000.0184000.0217000.0238000.0298000.0235000.0228000.0179000.0285000.0264000.0239000.0292000.0236000.0351000.0221000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery15.343.630.512.220.738.227.915.627.822.514.823.540.221.229.326.120.023.0

us-gaap:CommercialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1058000.0108000.0445000.01215000.0378000.0127000.0431000.01418000.0434000.0606000.0551000.0340000.0202000.0404000.0528000.0474000.01114000.0356000.0934000.0637000.0652000.0433000.01422000.0999000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery78.127.152.273.542.522.450.574.351.359.845.728.130.735.853.052.463.337.158.254.352.043.771.767.5

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value90000.0117000.0147000.0235000.0327000.0224000.0185000.0192000.0177000.0180000.0477000.0587000.0191000.0486000.0176000.0195000.0294000.0382000.0415000.0286000.0319000.0238000.0342000.0197000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery6.629.317.314.236.839.421.710.120.917.839.548.429.143.017.721.516.739.825.924.425.424.017.313.3

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.5380.7730.6311.1360.8920.8660.9580.9581.0630.8450.4910.9020.6920.9662.8761.3990.8080.5041.9610.9111.2141.6422.4131.5363.2863.3842.6543.4785.834.276.1145.1196.2869.8898.528.76810
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.4230.3280.4510.4360.3510.3840.4590.2850.320.3660.3150.3390.3480.4720.3930.4730.4990.306
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs9.342.471.538.439.344.347.929.730.143.364.237.650.348.913.733.861.860.7

us-gaap:CommercialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value4.00.0360.010.3030.250.1190.1580.2250.0250.040.0770.0920.1510.1350.9180.3650.0340.01.1760.190.0380.290.6460.385
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs88.14.71.626.728.013.716.523.52.44.715.710.221.814.031.926.14.20.060.020.93.117.726.825.1

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0.1150.4090.170.3970.2910.3630.3410.4480.7180.4390.0990.4710.1930.3591.5650.5610.2750.1980.4860.3790.8340.8681.2650.729
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs2.552.926.934.932.641.935.646.867.552.020.252.227.937.254.440.134.039.324.841.668.752.952.447.5

us-gaap:FinancingReceivableModificationsNumberOfContracts2

us-gaap:FinancingReceivableModificationsNumberOfContracts2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value10.07.06.07.07.04.08.07.07.012.011.04.013.09.08.012.07.013.020.05.09.012.025.012.013.020.024.013.022.0
Percentage of FinancingReceivableModificationsNumberOfContracts2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsNumberOfContracts2 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value07.0-6.04.02.01.01.00
Percentage of FinancingReceivableModificationsNumberOfContracts20.0116.7-85.757.150.014.38.30.0

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value6.001.01.02.0
Percentage of FinancingReceivableModificationsNumberOfContracts260.00.025.014.328.6

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302020-03-312019-06-30
Value1.03.02.0
Percentage of FinancingReceivableModificationsNumberOfContracts210.042.928.6

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value01.0
Percentage of FinancingReceivableModificationsNumberOfContracts20.014.3

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value01.000
Percentage of FinancingReceivableModificationsNumberOfContracts20.014.30.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value1.0001.0
Percentage of FinancingReceivableModificationsNumberOfContracts210.00.00.025.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-06-30
Value2.00
Percentage of FinancingReceivableModificationsNumberOfContracts220.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-03-31
Value0001.0000001.00001.000
Percentage of FinancingReceivableModificationsNumberOfContracts20.00.00.014.30.00.00.00.00.011.10.00.00.07.70.00.0

us-gaap:FinancingReceivableModificationsNumberOfContracts2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value1.02.01.0
Percentage of FinancingReceivableModificationsNumberOfContracts214.328.614.3

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.000001.01.01.01.000-2.01.01.00
Percentage of FinancingReceivableModificationsNumberOfContracts228.60.00.00.00.014.38.39.125.00.00.0-25.08.314.30.0

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value0000000001.00001.0001.01.0
Percentage of FinancingReceivableModificationsNumberOfContracts20.00.00.00.00.00.00.00.00.011.10.00.00.07.70.00.011.18.3

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value7.0471.6181.5730.4421.9360.3911.0190.7830.3860.9040.6680.1550.890.4220.6660.7490.2242.3032.8450.3890.5271.3431.521.3322.5261.7581.0481.7151.276
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value0.00.191-0.1630.1020.0610.0410.0320.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.012.1-36.95.315.610.63.50.0

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value1.1080.00.0490.0240.153
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment215.70.012.53.139.6

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302020-03-312019-06-30
Value5.8351.1771.329
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment282.872.768.6

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value0.00.505
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.026.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value0.00.2810.00.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.017.40.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value0.0580.00.00.281
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.80.00.071.9

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-06-30
Value0.0460.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.70.0

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-03-31
Value0.00.00.00.1140.00.00.00.00.00.1890.00.00.00.1170.00.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.014.60.00.00.00.00.044.80.00.00.05.10.00.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value0.0990.1370.024
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment26.131.03.1

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0610.00.00.00.00.0410.0320.0650.010.00.0-0.0460.0340.0120.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment23.80.00.00.00.010.63.59.76.50.00.0-6.94.55.40.0

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value0.00.00.00.00.00.00.00.00.00.1890.00.00.00.117-0.0020.00.3090.367
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.00.00.00.00.00.00.044.80.00.00.05.1-0.10.058.627.6

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value7.0421.6171.5730.4381.9350.391.0010.7830.3820.9230.660.1540.8890.4180.6630.7590.2212.2593.1060.410.5091.5641.6461.3942.3021.7811.7811.7451.427
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value0.00.188-0.160.10.060.0410.0350.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.012.0-36.55.215.410.73.80.0

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value1.1080.00.0490.0240.153
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment215.70.012.63.140.1

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302020-03-312019-06-30
Value5.8351.1771.329
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment282.972.868.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value0.00.506
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.026.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value0.00.2810.00.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.017.40.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value0.0540.00.00.281
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.80.00.072.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-06-30
Value0.0450.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.60.0

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-03-31
Value0.00.00.00.1150.00.00.00.00.00.1890.00.00.00.1160.00.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.00.014.70.00.00.00.00.045.20.00.00.05.10.00.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value0.0990.1370.024
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment26.131.33.1

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.060.00.00.00.00.0410.0350.0640.010.00.0-0.0460.0340.0120.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment23.70.00.00.00.010.73.89.76.50.00.0-6.94.55.40.0

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value0.00.00.00.00.00.00.00.00.00.1890.00.00.00.1160.00.00.3130.378
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.00.00.00.00.00.00.00.045.20.00.00.05.10.00.061.527.1

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value00000000000000510000.020000.000160000.000030000.0020000.00000
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.00.00.0100.00.00.00.0100.00.0100.00.00.00.00.0

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnSalesOfLoansNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value178.846.3885.6774.3023.6112.0262.7453.2550.05
Percentage of GainLossOnSalesOfLoansNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSalesOfLoansNet us-gaap:CounterpartyName, us-gaap:FinancialInstrument

ibcp:FreddieMac, us-gaap:FixedRateResidentialMortgage


None
Period End2020-03-312019-03-31
Value0.720.53
Percentage of GainLossOnSalesOfLoansNet8.114.7

us-gaap:GainLossOnSalesOfLoansNet us-gaap:FinancialInstrument, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FixedRateResidentialMortgage, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-31
Value0.7
Percentage of GainLossOnSalesOfLoansNet7.9

us-gaap:GainLossOnSalesOfLoansNet us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrument

us-gaap:ResidentialPortfolioSegment, us-gaap:FixedRateResidentialMortgage


None
Period End2020-03-31
Value0.7
Percentage of GainLossOnSalesOfLoansNet7.9

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-06-30
Value6359545658636464707276848788105108111118121125134143150163162159150
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-30
Value787000.0886000.0763000.0753000.0710000.0765000.0758000.0787000.0762000.0803000.0670000.0827000.0881000.0853000.0883000.0908000.0910000.0935000.01061000.01146000.01169000.01198000.01159000.01260000.01275000.01342000.01388000.01511000.01475000.01492000.01549000.01563000.01486000.01393000.01349000.0
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1.6881.7210.260.8790.4840.18-0.3482.9491.8490.54-0.1160.5730.4891.6330.2440.6961.6362.643-1.2268.0119.5669.701-0.644121213-0.8561917160.176141414
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value0.00.00.00.00.0010.00.00.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment0.00.00.00.00.60.00.00.0

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value0.0840.00.00.4250.509
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment5.00.00.014.427.5

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302020-03-312019-06-30
Value0.00.3980.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment0.023.10.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value0.3550.304
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment21.062.8

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value0.3160.0770.00.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment18.74.50.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value0.4820.2990.180.179
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment28.617.437.299.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-06-30
Value0.3740.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment22.20.0

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-03-31
Value0.0770.00.00.00.00.00.00.00.00.00.00.00.00.00.00.031
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment4.60.00.00.00.00.0-0.00.00.00.00.00.00.00.00.00.3

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value0.1710.0-0.042
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment9.90.0-1.4

ibcp:Family14NonOwnerOccupied, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value0.3020.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment17.50.0

ibcp:Family14SecondLien, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value0.3960.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment23.00.0

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0010.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment0.10.00.00.00.00.00.0-0.00.00.00.00.00.00.00.0

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value0.0770.00.00.00.00.00.00.00.00.00.00.00.00.0-0.003-0.0050.0070.042
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment4.50.00.00.00.00.0-0.00.00.00.00.00.00.00.00.2-0.10.10.3

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value5000.08000.0-2000.013000.02000.0014000.017000.015000.012000.012000.017000.015000.05000.041000.06000.05000.032000.0311000.0130000.0105000.0124000.06000.0182000.0128000.0311000.0156000.0431000.0228000.0205000.0381000.0192000.0162000.067000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value001000.0001000.000
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod0.0-0.07.70.00.06.70.00.0

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value1000.0007000.09000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod20.00.00.041.260.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value3000.00
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod60.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value01000.000
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod0.012.50.00.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value1000.04000.02000.00
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod20.050.0100.00.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value1000.007000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod12.50.041.2

ibcp:Family14NonOwnerOccupied, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value2000.00
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod25.00.0

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value01000.00001000.00-1000.01000.0000000
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod0.07.70.00.00.06.70.0-8.35.90.00.00.00.00.00.0

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value000000000000000001000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.5

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value6157-0.358535657-0.77606264-1.477697275-1.581838586-2.6519798101-1.044105109111-2.471115125133-2.247149147145
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-31
Value0.0740.0240.0670.00.0010.0010.00.0010.0010.00.0020.0020.002
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment0.10.00.10.00.00.0-0.00.00.0-0.00.00.00.0

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value2.5462.749-2.8323.2583.3160.4140.4060.369
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment4.1-767.9-5.35.85.70.70.60.5

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302020-03-312019-09-302019-06-302018-12-312018-09-302018-06-302017-06-302017-03-312016-09-302016-03-31
Value0.110.065-0.0060.067-0.0020.0830.0860.1040.1080.1140.12
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment0.20.1-0.00.10.30.10.10.10.10.10.1

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value2.4092.4183.2782.2642.522
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment3.94.35.73.84.0

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302020-03-312019-06-30
Value15115.587
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment26.019.210.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value4.77418
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment7.833.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value1.187120.6331.579
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment1.921.51.12.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value225.3811218
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment36.19.322.032.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-06-30
Value0.6940.556
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment1.11.0

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-03-31
Value111212141515-0.102161616-0.1611717181818
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment18.822.522.623.724.224.66.923.222.822.410.220.820.621.018.918.3

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:BoatLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0380.0860.0670.0510.00.0010.00.0010.00.0010.0010.001
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment0.10.20.10.1-0.00.00.00.0-0.00.00.00.0

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value2.0321.534-0.135
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment3.52.9-0.2

ibcp:Family14NonOwnerOccupied, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value4.7844.069
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment8.37.0

ibcp:Family14SecondLien, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value7.4368.802
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment12.815.2

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.7670.4430.4790.430.4060.4140.4060.0040.361-0.0080.385-0.4390.4240.4420.463
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment4.80.80.90.70.70.70.6-0.30.5-0.00.527.80.50.50.5

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value11-0.289-0.252131515-0.10216-0.18216-0.161171718-0.075-0.0641819
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment20.4-0.5-0.422.724.224.66.923.2-0.322.410.220.820.621.02.8-0.118.718.3

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value782000.0878000.0765000.0740000.0708000.0765000.0744000.0770000.0747000.0791000.0658000.0810000.0866000.0848000.0842000.0902000.0905000.0903000.0750000.01016000.01064000.01074000.01153000.01078000.01147000.01031000.01232000.01080000.01247000.01287000.01168000.01371000.01324000.01326000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-31
Value02000.000001000.0001000.0000
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod0.00.30.00.00.00.00.20.00.00.10.00.00.0

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-06-30
Value35000.0175000.0-81000.043000.052000.07000.06000.06000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod4.522.9-10.96.16.80.90.80.7

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302020-03-312019-09-302019-06-302018-12-312018-09-302018-06-302017-06-302017-03-312016-09-302016-03-31
Value01000.01000.001000.01000.01000.02000.01000.02000.02000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod0.00.10.10.00.10.10.10.20.10.20.2

us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-06-302019-03-312018-09-302018-06-30
Value29000.016000.020000.024000.034000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod3.72.32.63.14.6

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302020-03-312019-06-30
Value288000.0223000.083000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod36.825.411.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302019-06-30
Value52000.0251000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod6.635.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value11000.0360000.010000.027000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod1.441.01.43.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value273000.04000.0155000.0356000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod34.90.521.946.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-06-30
Value2000.03000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod0.30.4

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-03-31
Value92000.0171000.0147000.0161000.0150000.0164000.0152000.0153000.0150000.0161000.0139000.0161000.0159000.0160000.0163000.0171000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod11.823.120.820.920.120.723.118.917.319.016.517.817.617.716.015.9

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:BoatLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value02000.00000001000.0000
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod0.00.30.00.00.00.00.00.00.20.00.00.0

ibcp:CommercialAndIndustrial, us-gaap:CommercialPortfolioSegment


None
Period End2020-03-312019-09-302018-09-30
Value38000.016000.024000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod4.32.23.1

ibcp:Family14NonOwnerOccupied, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value66000.064000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod7.58.4

ibcp:Family14SecondLien, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-03-31
Value4000.03000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod0.50.4

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value41000.03000.05000.06000.05000.07000.06000.06000.06000.06000.07000.0-23000.07000.09000.07000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod4.70.40.70.80.60.90.80.90.70.70.8-2.70.81.00.8

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-30
Value141000.0171000.0147000.0175000.0150000.0164000.0152000.0153000.0150000.0161000.0139000.0161000.0159000.0160000.0163000.0163000.0173000.0195000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod16.123.120.822.920.120.723.118.917.319.016.517.817.617.721.716.016.318.1

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value003600000.03477000.02457000.0000120000.00982000.0489000.0359000.0140000.0126000.077000.0240000.0120000.066000.0138000.036000.055000.0100000.0111000.04000.01000.01000.0-34000.070000.06000.094000.012000.055000.0131000.033000.006000.020000.0221000.088000.0
Percentage of IncomeTaxesPaid0.00.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value120.599-0.9752.9637.672.4552.17-3.5347.315-5.7113.168-1.6857.177-3.218-0.571-1.233.252-0.6130.4880.21
Percentage of IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.5021.9250.1280.3080.515-2.039-2.322-2.454-2.479-2.039-8.5870.167-3.753-3.8360.662-3.101-3.157-2.468-1.787-2.735-2.033-2.442-1.7-2.344-2.572-2.302-1.2570.741580.0
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInDeposits


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value40146-15.5857344201141862295697-16.84371878-26.4146825108-39.0567628-12.176-30.671533533-34.70471-2.408-0.6361.285987.48413-158.282-28.871-126.6621.349
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLoansDeferredIncome

us-gaap:IncreaseDecreaseInLoansDeferredIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-7791000.0358000.0-186000.01175000.01836000.0111000.0363000.01224000.01819000.0638000.0571000.01586000.02071000.0931000.0277000.0647000.0771000.0216000.045000.0259000.0737000.0193000.0-93000.0320000.0521000.05000.0-45000.0-58000.0219000.0-133000.0-109000.097000.0307000.097000.021000.0214000.0186000.028000.0-102000.08000.0
Percentage of IncreaseDecreaseInLoansDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.499-5.0954.424-0.963-4.9958.107-12.03513-2.2985.675-9.45111-0.9262.848-0.0624.489-0.1091.161.0280.91-0.034-0.517-3.4556.545-0.6870.1760.8253.638-9.637-2.573-3.1578.722-4.2220.934-10.16-11.066.167-1.821-0.088-4.851
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value84000.099000.0-1000.0110000.0112000.0127000.0-4000.0182000.0224000.0135000.0-2000.0138000.0143000.0152000.01000.0149000.0148000.0112000.0-1000.0118000.0120000.0121000.0-2000.0123000.0126000.0124000.0-83908.097000.084000.061.02.09000.07000.00000
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3335363737363634332626252323222121212020201919202020212121212324252526282930333538
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseBorrowings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.9040.6880.7110.7030.7960.7120.7460.7790.9140.5740.6890.6260.5630.470.4860.4930.4850.4770.4650.4650.4630.4540.6120.6490.5590.5120.8310.8840.8760.8650.8791.0591.121.1721.1981.1831.2321.3231.6621.9652.413
Percentage of InterestExpenseBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.3884.75.4876.2366.0215.6815.0063.9763.2092.2872.0211.8331.4781.4431.4211.2541.1521.1141.0480.9870.9671.0071.1781.2361.261.2931.3431.3711.4631.5291.9612.2232.3052.4242.5713.234.5114.9455.76.7377.508
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2523303130293029282322222021202020202119181819182018201921202021201616171913181715
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value793000.0390000.0325000.0319000.0324000.0374000.0408000.0412000.0444000.0479000.0522000.0512000.0511000.0455000.0390000.0330000.0282000.0248000.0240000.0228000.0222000.0217000.0161000.0281000.0287000.0262000.0339000.0282000.0242000.0238000.0243000.0261000.0244000.0296000.0288000.0301000.0298000.0332000.0338000.0383000.0526000.0
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.8473.0593.0312.7713.0343.0062.7822.7372.722.6352.6282.7652.7812.7542.662.5372.482.2442.2771.9011.8691.7581.7181.6441.5961.3831.2871.1090.9930.670.6880.6550.9330.6580.3140.2970.3440.4670.4810.5090.902
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaid

us-gaap:InterestPaid


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3.6375.4896.5126.9976.9356.2535.5694.6233.8892.6562.9232.4722.1461.6221.6051.6531.6631.4951.4671.4241.4011.4771.9151.7911.8381.8212.061101.8071.812.4052.7332.883.0343.2544.1145.5555.8068.128.102
Percentage of InterestPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1616181615161516151413131314121312111212111112111111121211111413131212121312121213
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value506000.0508000.0612000.0617000.0592000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments

us-gaap:MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0253000.03000.000304000.0209000.093000.09000.0-173000.0198000.069000.0-34000.027000.0261000.0-45000.0185000.0162000.0-77000.045000.0-33000.085000.0-5000.0168000.054000.0112000.0190000.014000.0107000.084000.072000.0301000.0169000.0684000.0-22000.0-57000.0115000.0213000.014000.0-3000.01363000.0
Percentage of MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments0.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2728292726272626292423222223242220222221212222222222242527252929292836313133403737
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value201115129.9059.9598.9511112111110101013119.587.8091010108.9629.20110108.955109.837131121141314129.2551212171229
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:NoninterestIncomeOtherOperatingIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.5982.1632.422.4922.1062.2642.4662.1342.2171.9432.0292.041.7911.7211.7151.7961.9331.9721.8111.8812.091.912.1022.1562.5082.1652.212.042.1642.1232.8262.563.0442.6042.3812.6392.6222.5322.3882.2411.682
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2.1592.462.2162.1612.1312.5052.2452.2332.172.2642.071.971.922.1422.0411.9191.8562.2071.971.942.042.4192.1972.0792.1532.4832.2572.0172.1472.4242.4162.4822.492.7162.7682.6512.6633.1012.7912.7212.595
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value8444000.0-927000.0-384000.01138000.02498000.03517000.0-56000.0-618000.0-691000.0-2513000.0-2256000.0157000.02731000.02341000.0-6091000.0278000.01588000.01349000.0-1540000.0894000.0-1188000.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value62000.0-321000.0110000.0-58000.0-599000.0-719000.0-1313000.0307000.0258000.0541000.0148000.062000.00
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent0.734.6-28.6-5.1-24.0-20.42344.6-49.7-37.3-21.5-6.639.50.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value8382000.0-606000.0-494000.01196000.03097000.04236000.01257000.0-925000.0-949000.0-3054000.0-2404000.095000.02731000.02341000.0-6091000.0278000.01588000.01349000.0-1540000.0894000.0-1188000.01483000.0519000.0226000.0
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent99.365.4128.6105.1124.0120.4-2244.6149.7137.3121.5106.660.5100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value476000.0486000.0565000.0563000.0564000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value460000.0476000.0509000.0565000.0564000.0563000.00000
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value10-1.02-0.6291.5143.925.2251.489-1.171-1.174-3.847-3.7880.1384.1913.495-9.3740.4122.3321.904-2.371.376-1.8272.2060.5930.2351.9762.369-0.211-3.018-2.1941.0140.2781.3992.809-1.423-0.1940.1411.068
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value8382000.0-806000.0-497000.01196000.03097000.04128000.01177000.0-925000.0-928000.0-3039000.0-2463000.090000.02724000.02272000.0-6093000.0268000.01516000.01237000.0-1540000.0894000.0-1188000.01434000.0385000.0153000.01285000.01539000.0-136000.0-1962000.0-1781000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2228000.0-214000.0-132000.0318000.0823000.01097000.0312000.0-246000.0-246000.0-808000.0-1325000.048000.01467000.01223000.0-3281000.0144000.0816000.0667000.0-830000.0482000.0-639000.0772000.0208000.082000.0691000.0830000.0-75000.0-1056000.0-413000.000000
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value339000.0-331000.0105000.0-174000.0-898000.0-1061000.0-1767000.0316000.0274000.0678000.0242000.0100000.00000000095000.095000.095000.095000.095000.095000.079000.091000.096000.0183000.0242000.0279000.0337000.0130000.0108000.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value71000.0-69000.021000.0-36000.0-187000.0-224000.0-371000.066000.058000.0142000.085000.035000.00000000033000.033000.034000.033000.034000.033000.0-1385000.0
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value8650000.0-1068000.0-413000.01058000.02386000.03291000.0-219000.0-675000.0-712000.0-2503000.0-2306000.0155000.02724000.02272000.0-6093000.0268000.01516000.01237000.0-1540000.0894000.0-1188000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value268000.0-262000.084000.0-138000.0-711000.0-837000.0-1396000.0250000.0216000.0536000.0157000.065000.00
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent3.124.5-20.3-13.0-29.8-25.4637.4-37.0-30.3-21.4-6.841.90.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value8382000.0-806000.0-497000.01196000.03097000.04128000.01177000.0-925000.0-928000.0-3039000.0-2463000.090000.02724000.02272000.0-6093000.0268000.01516000.01237000.0-1540000.0894000.0-1188000.01434000.0385000.0153000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent96.975.5120.3113.0129.8125.4-537.4137.0130.3121.4106.858.1100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-03-312015-12-312015-09-302015-03-312014-12-312014-09-30
Value8650000.0-1068000.0-413000.01058000.02386000.03291000.0-219000.0-675000.0-712000.0-2503000.01237000.0-1540000.0894000.01434000.0447000.0215000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0253000.03000.000137000.0101000.00-26000.0-19000.090000.08000.011000.0106000.03000.015000.0109000.0174000.000075000.0206000.0121000.02000.00-1000.0015000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax0.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.00.0100.00.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value-261000.0-75000.032000.0102000.0142000.0149000.0105000.073000.053000.06000.0-13000.0-5000.0000000000-114000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value78000.0-406000.0137000.0-72000.0-756000.0-912000.0-1662000.0389000.0327000.0684000.0229000.095000.0000000001000.00-35000.0-3000.02000.0-54000.0-24000.0-51000.0-4000.0-215000.0-240000.0-23000.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:InterestRateCap, us-gaap:CashFlowHedging


None
Period End2020-06-302020-03-312019-06-302018-12-312018-09-302018-06-302017-06-30
Value140000.0-14000.0-489000.0-1394000.0297000.0244000.00
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax179.53.464.783.976.374.60.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:FixedIncomeInterestRate


None
Period End2020-06-302020-03-312019-06-302019-03-31
Value-62000.0-392000.0-267000.0-127000.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax-79.596.635.313.9

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:CashFlowHedging


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value78000.0-406000.0137000.0-72000.0-756000.0-912000.0-1662000.0389000.0327000.0684000.0229000.095000.00
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value268000.0-262000.084000.0-138000.0-711000.0-837000.0-1396000.0250000.0216000.0536000.0157000.065000.00000000062000.062000.061000.062000.061000.062000.01464000.091000.096000.0183000.0242000.0279000.0
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value10-0.598-0.6161.5673.925.3641.626-1.157-1.198-3.865-3.6730.024.0953.623-9.3640.4512.3342.114-2.371.366-1.8062.270.8330.2531.7592.25-0.299-2.91-2.4630.9740.2140.9092.756-0.86-1.2170.3570.3940.321
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherInterestAndDividendIncome


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value251000.0366000.0412000.0495000.0379000.0575000.0393000.0303000.0265000.0330000.0233000.0263000.0292000.0312000.0311000.0281000.0297000.0306000.0278000.0295000.0289000.0338000.0324000.0325000.0328000.0423000.0331000.0310000.0324000.0332000.0430000.0432000.0382000.0396000.0362000.0367000.0383000.0435000.0399000.0425000.0389000.0
Percentage of OtherInterestAndDividendIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2684000.02446000.01938000.02181000.01915000.02461000.02339000.01832000.01958000.01284000.01645000.01463000.01633000.01655000.01355000.01497000.01466000.01460000.01566000.01564000.01411000.01537000.01649000.01658000.01536000.01758000.01685000.01763000.01684000.01729000.02038000.01966000.02077000.0649000.01188000.02477000.02292000.02008000.02441000.02274000.02127000.0
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value000000000000000000000009000.0000026000.007000.070000.085000.0177000.0189000.04000.00
Percentage of OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value0000000000000000000000000000000000425000.000
Percentage of OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.0

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale

us-gaap:PaymentsForOriginationOfMortgageLoansHeldForSale


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3972271962181508211312813084110122112809795735562658275686155416087112117148126129108133836891172151
Percentage of PaymentsForOriginationOfMortgageLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1000.0590000.03000.013000.00866000.0140000.06000.0433000.0888000.043000.049000.060000.0427000.000561000.066000.001025000.0066000.0000000
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.00.0100.00.00.00.00.00.00.0

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

us-gaap:PaymentsToAcquireAvailableForSaleSecurities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value343103114419.9467143242323161424458454857439833477404844916581821030.3441328150692021621.20.595
Percentage of PaymentsToAcquireAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value791605430270.0701581004401612192420.00.00.00.10.00.00.00.10.00.00.00.01212123.04.00.00.0
Percentage of ProceedsFromFederalHomeLoanBankBorrowings100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.0100.00.00.00.00.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.0110.0020.00.00.2820.0650.0550.1340.0130.0150.00.0320.0250.0210.0050.0240.0320.0090.0230.0640.0160.0310.0290.0260.011-0.079970.0030.9540.8610.060.4970.00.00.00.4890.8460.4630.0
Percentage of ProceedsFromIssuanceOfCommonStock0.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.0

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromLifeInsurancePolicies


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0945000.00470000.000000474000.0000523000.001493000.0742000.0000
Percentage of ProceedsFromLifeInsurancePolicies0.0100.00.0100.00.00.00.00.00.0100.00.00.00.0100.00.0100.0100.00.00.00.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value684243334432353754342944495052
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForInInterestBearingDepositsInBanks

us-gaap:ProceedsFromPaymentsForInInterestBearingDepositsInBanks


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.350.150.00.00.10.01.8860.8421.00.751.85
Percentage of ProceedsFromPaymentsForInInterestBearingDepositsInBanks0.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromRepaymentsOfOtherDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-31.36.2966.647170.5480.002-25.503213.66-6.7533.7513.004-0.0010.0-0.0050.0060.0-0.0010.00.00.001-0.002-13.65-0.1513-0.0050.006-0.002-0.0050.005-0.003-0.0060.0030.006-0.0040.005-0.002-0.006-35.102-0.015
Percentage of ProceedsFromRepaymentsOfOtherDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1421242.0690.042170.09.168228.4741.0041.6786.1527.6521.08912420.2510.00.0117.0032.5045.1260.00.00.01.141.80.0189.7939.2060.00.057121.2040.759
Percentage of ProceedsFromSaleOfAvailableForSaleSecurities100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1421242.0690.042170.09.168227.7141.764
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfForeclosedAssets

us-gaap:ProceedsFromSaleOfForeclosedAssets


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-0.0660.3280.3280.630.6410.1670.7490.8880.2810.6081.5920.5633.310.2380.3970.8361.6611.3570.561.1042.6671.8486.0369.5651.6751.1951.8871.8386.313.5115.2695.153.6145.2984.3974.1575.5654.5197.154.319
Percentage of ProceedsFromSaleOfForeclosedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.02.3950.09.8860.04010110.0160.00.00.00.0
Percentage of ProceedsFromSaleOfLoansHeldForInvestment0.0100.00.0100.00.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment us-gaap:CounterpartyName, us-gaap:FinancialInstrument

ibcp:FreddieMac, us-gaap:FixedRateResidentialMortgage


None
Period End2020-03-312019-03-31
Value2629
Percentage of ProceedsFromSaleOfLoansHeldForInvestment1093.973.3

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment us-gaap:FinancialInstrument, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FixedRateResidentialMortgage, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-31
Value2.4
Percentage of ProceedsFromSaleOfLoansHeldForInvestment100.2

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrument

us-gaap:ResidentialPortfolioSegment, us-gaap:FixedRateResidentialMortgage


None
Period End2020-03-31
Value2.4
Percentage of ProceedsFromSaleOfLoansHeldForInvestment100.2

us-gaap:ProceedsFromSaleOfLoansHeldForSale

us-gaap:ProceedsFromSaleOfLoansHeldForSale


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value395241219199135871121401189212112310781102927257617284706863484869971171311481321301161208364122186127
Percentage of ProceedsFromSaleOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised us-gaap:AwardType

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:EmployeeStockOption


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1000.041000.05000.06000.00695000.0378000.058000.0
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value468000.0393000.0533000.0541000.0371000.0369000.0528000.0477000.0456000.0378000.0516000.0550000.0389000.0437000.0564000.0420000.0345000.0413000.0661000.0519000.0453000.0380000.0589000.0559000.0420000.0401000.0616000.0487000.0664000.0692000.01058000.0952000.01268000.0897000.01611000.0751000.0801000.0778000.01239000.0831000.0894000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value3.42.40.50.50.30.50.80.10.50.10.00.30.10.3-0.10.1-0.10.6-0.81.00.50.60.70.50.21.51.20.50.70.30.10.30.62.32.32.72.9
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5.1886.721-0.221-0.2710.6520.6640.591-0.0530.650.3150.3930.5820.583-0.3590.13-0.175-0.734-0.53-1.677-0.244-0.134-0.659-1.087-0.632-1.8450.428-0.835-0.355-2.107-0.6910.4490.2511.0565.1316.9176.1714.378107.5289.54312
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.1750.1290.1260.2890.2090.5230.28-0.0250.1380.0690.187-0.0330.0730.1330.0020.2080.1260.065
Percentage of ProvisionForLoanAndLeaseLosses3.41.9-57.0-106.632.178.847.447.221.221.947.6-5.712.5-37.01.5-118.9-17.2-12.3

us-gaap:CommercialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1.4612.218-0.736-0.810.4750.420.458-0.907-0.362-0.135-0.13-0.097-0.039-0.061-0.725-0.153-0.663-0.404-1.216-0.0260.1770.328-0.519-0.601
Percentage of ProvisionForLoanAndLeaseLosses28.233.0333.0298.972.963.377.51711.3-55.7-42.9-33.1-16.7-6.717.0-557.787.490.376.272.510.7-132.1-49.847.795.1

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-0.13-0.5080.2560.083-0.3860.573-0.3210.4150.2160.1470.0260.0680.038-0.6990.727-0.247-0.359-0.279-0.863-0.047-0.101-0.733-0.634-0.009
Percentage of ProvisionForLoanAndLeaseLosses-2.5-7.6-115.8-30.6-59.286.3-54.3-783.033.246.76.611.76.5194.7559.2141.148.952.651.519.375.4111.258.31.4

us-gaap:UnallocatedFinancingReceivables


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3.6824.8820.1330.1670.354-0.8520.1740.4640.6580.2340.310.6440.5110.2680.1260.0170.1630.0910.501-0.117-0.168-0.167
Percentage of ProvisionForLoanAndLeaseLosses71.072.6-60.2-61.654.3-128.329.4-875.5101.274.378.9110.787.7-74.796.9-9.7-22.2-17.2-29.948.0125.425.3

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-206000.0141000.029000.080000.0112000.0226000.0163000.057000.021000.0-10000.050000.02000.07000.069000.02000.010000.072000.0112000.0000
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-206000.0-59000.026000.080000.0112000.0118000.083000.057000.042000.05000.0-9000.0-3000.00
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0-41.889.7100.0100.052.250.9100.0200.0-50.0-18.0-150.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0200000.03000.000108000.080000.00-21000.0-15000.059000.05000.07000.069000.02000.010000.072000.0112000.000049000.0134000.073000.0
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent-0.0141.810.30.00.047.849.10.0-100.0150.0118.0250.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value991533625120.0981401009601862311650.02.0890.2760.2160.2550.1440.00.2080.2360.1334.240.10.2190.2220.00.0920.20315121491-66.126292758
Percentage of RepaymentsOfFederalHomeLoanBankBorrowings100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0116000.02139000.064000.007703000.00000
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability0.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0400000.0000500000.0000500000.000400000.0100000.0000200000.0000300000.0000400000.000400000.0100000.0-100000.0-300000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized us-gaap:TitleOfIndividual

ibcp:NonEmployeeDirectors


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value0200000.0000200000.0000200000.0000200000.0000200000.0000200000.000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.050.00.00.00.040.00.00.00.040.00.00.00.0200.00.00.00.0100.00.00.00.066.70.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:EmployeeStockOption


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3000.0210000.029000.032000.00836000.0506000.0153000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value156.028174.0263.0919.0056286.020418.0382.050057.037328.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value9000.07000.04000.05000.05000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:StockIssuedDuringPeriodSharesNewIssues


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-09-302013-08-31
Value0.000350.0115670.00150.00190.00.0683990.0390010.008340.1014080.00381.72511
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0105890.0-342.05991.02498.084128.0-1891.007444.074475.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation0.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value462000.0547000.0506000.0460000.0468000.0420000.0438000.0445000.0441000.0407000.0406000.0426000.0484000.0432000.0420000.0375000.0415000.0410000.0324000.0381000.0399000.0373000.0301000.0310000.0326000.0255000.0236000.0575000.0191000.0236000.0297000.0268000.0259000.045000.0446000.0307000.0302000.0153000.0127000.0123000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value462000.0547000.0506000.0460000.0468000.0420000.0438000.0445000.0441000.0407000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodShares

us-gaap:StockRepurchasedDuringPeriodShares


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0678930.0025000.01063900.0115790.0
Percentage of StockRepurchasedDuringPeriodShares0.0100.00.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodShares us-gaap:StatementEquityComponents

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0678930.0025000.01063900.0115790.0587970.0000
Percentage of StockRepurchasedDuringPeriodShares0.0100.00.0100.0100.0100.00.00.00.00.0

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:StockRepurchasedDuringPeriodValue


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value0.0130.00.502232.530.00.00.00.01.3440.0154.4735.3572.7660.9020.00.00.0
Percentage of StockRepurchasedDuringPeriodValue0.0100.00.0100.0100.0100.00.00.00.00.0100.00.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:CommonStock


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0130.00.502232.53120.00.00.0
Percentage of StockRepurchasedDuringPeriodValue0.0100.00.0100.0100.0100.00.00.00.00.0

us-gaap:TransferOfOtherRealEstate

us-gaap:TransferOfOtherRealEstate


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.0660.4811.0950.3250.3190.3190.3220.3750.5120.5020.5160.4020.8730.4891.3371.0170.5341.7570.8273.6780.8040.7811.6695.1663.1162.8333.1616.122.5096.4374.0256.4538.783
Percentage of TransferOfOtherRealEstate0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-31
Value21000.015000.043000.049000.023000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value222222232324242121212121212223232323232321240.02183139400.0473185149
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:AccruedInterestImpairedLoans

ibcp:AccruedInterestImpairedLoans


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value341000.0242000.0255000.0253000.0260000.0255000.0271000.0277000.0283000.0274000.0277000.0288000.0305000.0290000.0311000.0330000.0305000.0303000.0338000.0
Percentage of AccruedInterestImpairedLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:AllowanceForLoanLossesAllocated

ibcp:AllowanceForLoanLossesAllocated


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value7.368.1386.1555.7786.0276.6866.316.1026.3076.3326.8397.0617.2447.6349.15210101010121212131213141516171921232122
Percentage of AllowanceForLoanLossesAllocated100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:AllowanceForLoanLossesAndUnfundedLendingCommitmentsLimitedAtSpecificRiskWeightedAssets us-gaap:ConsolidatedEntities

ibcp:AllowanceForLoanLossesAndUnfundedLendingCommitmentsLimitedAtSpecificRiskWeightedAssets

ibcp:IndependentBank


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value34342727272626252424232220
Percentage of AllowanceForLoanLossesAndUnfundedLendingCommitmentsLimitedAtSpecificRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value34342727272626252424232220
Percentage of AllowanceForLoanLossesAndUnfundedLendingCommitmentsLimitedAtSpecificRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CapitalizedMortgageLoanServicingRightsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

ibcp:CapitalizedMortgageLoanServicingRightsFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-03-31
Value1314191617192121171514
Percentage of CapitalizedMortgageLoanServicingRightsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CapitalizedMortgageLoanServicingRightsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1314191617192123211715141414
Percentage of CapitalizedMortgageLoanServicingRightsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0

ibcp:CashAndDueFromBanksFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

ibcp:CashAndDueFromBanksFairValueDisclosure

us-gaap:FairValueInputsLevel1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value4748533834332336
Percentage of CashAndDueFromBanksFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CashAndDueFromBanksFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value4748533834332336
Percentage of CashAndDueFromBanksFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value4748533834332336
Percentage of CashAndDueFromBanksFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CollateralDependentLoansCarryingAmount

ibcp:CollateralDependentLoansCarryingAmount


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value17163.42.23.03.73.51.82.72.02.62.52.62.64.04.45.45.35.1106.67.68.28.21012109.19.91722262733
Percentage of CollateralDependentLoansCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CollateralDependentLoansValuationAllowance

ibcp:CollateralDependentLoansValuationAllowance


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value3.44.11.50.91.21.71.50.80.90.50.70.70.70.72.02.02.32.72.53.83.12.83.12.42.43.73.43.13.25.46.57.88.310
Percentage of CollateralDependentLoansValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:CommonEquityTierOneCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

ibcp:CommonEquityTierOneCapitalToRiskWeightedAssets

ibcp:IndependentBank


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.11760.11960.11750.1180.11940.11940.12190.12530.13250.12950.12760.1387
Percentage of CommonEquityTierOneCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.10790.11360.110.10930.11830.11790.12090.11970.12440.12430.12470.1324
Percentage of CommonEquityTierOneCapitalToRiskWeightedAssets91.895.093.692.699.198.799.295.593.996.097.795.5

ibcp:CreditScore500To549 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScore500To549

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value1.5921.7391.9681.8552.0561.6351.7751.2861.351.3981.6411.8162.1692.4572.8133.1423.92
Percentage of CreditScore500To549100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value13121312139.7419.7899.89610111212121112101113131718
Percentage of CreditScore500To549817.0714.1685.9700.5656.1595.8551.5769.5753.0793.0738.0662.4564.2474.4430.90.00.00.0430.60.0480.4

ibcp:CreditScore500To549 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value0.3670.3190.3770.2860.4480.2810.2430.44
Percentage of CreditScore500To54923.118.319.216.133.217.113.415.6

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.9091.1270.6510.440.4750.5110.0610.084
Percentage of CreditScore500To54957.157.336.731.528.918.21.92.1

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value0.3160.4640.1450.2250.0760.0830.1250.1810.189
Percentage of CreditScore500To54919.823.67.812.75.95.16.97.46.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value0.9961.7141.87
Percentage of CreditScore500To54962.698.695.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value2.1433.6931.5190.0
Percentage of CreditScore500To549134.6212.477.20.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value7.7985.2367.94
Percentage of CreditScore500To549489.8301.1403.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value1.4251.2081.2810.882
Percentage of CreditScore500To54989.569.565.149.7

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value0.6440.8890.1050.1060.7491.0091.4041.4381.0512.156
Percentage of CreditScore500To54940.545.26.46.053.661.577.351.133.555.0

ibcp:CreditScore500To549 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.9910.7480.8590.6020.6510.4330.4610.4340.5130.4170.0450.061
Percentage of CreditScore500To54957.040.341.836.836.733.734.123.923.717.01.61.9

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value0.4290.1810.2160.2250.0790.1070.0830.189
Percentage of CreditScore500To54924.78.813.212.75.97.75.18.7

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.5680.8890.620.6840.1060.8220.9491.0091.4071.3971.4380.8710.8820.9851.0511.253
Percentage of CreditScore500To54932.745.233.433.36.063.970.361.564.956.951.10.00.00.033.50.0

ibcp:CreditScore550To599 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScore550To599

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value2.8223.3733.4223.1433.463.0763.363.623.653.693.7943.7773.9613.9744.2895.2525.962
Percentage of CreditScore550To599100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value171617202016171617191920201818202022222127
Percentage of CreditScore550To599616.4491.5498.6640.3601.2524.3514.9455.1466.6534.3513.5534.7515.6460.3441.40.00.00.0432.80.0464.9

ibcp:CreditScore550To599 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value0.7691.0290.9460.6520.4220.640.4680.882
Percentage of CreditScore550To59927.330.527.619.411.616.912.420.6

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value1.4691.8840.8380.8060.8710.8330.1090.134
Percentage of CreditScore550To59952.155.124.921.823.019.42.12.2

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value0.5840.5920.6170.4530.3340.3050.2440.2510.28
Percentage of CreditScore550To59920.717.319.613.59.28.06.56.36.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value2.0241.7511.863
Percentage of CreditScore550To59971.751.954.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value1.9744.1010.5142.034
Percentage of CreditScore550To59970.0121.615.060.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value118.57112
Percentage of CreditScore550To599394.2254.1359.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value1.691.4961.7031.385
Percentage of CreditScore550To59959.944.449.841.2

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value0.5850.6731.6731.8672.4862.712.7773.033.073.639
Percentage of CreditScore550To59920.719.754.455.667.471.473.570.658.561.0

ibcp:CreditScore550To599 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value1.7640.7350.8530.7680.8380.9611.0250.8940.9560.7770.0530.109
Percentage of CreditScore550To59952.323.424.725.024.926.528.123.724.119.61.22.1

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value0.580.6530.4360.4530.3680.3080.3050.255
Percentage of CreditScore550To59917.218.914.213.510.18.38.06.4

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.6590.6731.1711.4651.8671.221.2322.712.793.0063.032.4672.4853.0523.072.546
Percentage of CreditScore550To59919.519.737.342.355.633.733.871.470.475.670.60.00.00.058.50.0

ibcp:CreditScore600To649 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScore600To649

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value8.1557.6238.1357.8498.3237.3327.6687.5857.4538.027.847.768.0497.7818.4029.50511
Percentage of CreditScore600To649100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value444447373942413836313135353635384038383939
Percentage of CreditScore600To649541.6588.4580.7483.2470.3576.1544.4503.3491.2396.7405.8452.6446.9467.0425.90.00.00.0400.90.0355.2

ibcp:CreditScore600To649 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value2.3782.1172.2541.6572.0152.0521.731.846
Percentage of CreditScore600To64929.227.827.721.627.026.222.322.0

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value4.0854.472.7512.3762.4022.2690.20.255
Percentage of CreditScore600To64950.154.935.929.630.627.02.12.3

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value1.6921.4111.6920.9920.7780.7540.8380.7810.821
Percentage of CreditScore600To64920.717.321.612.910.39.610.810.09.8

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value5.2135.5485.897
Percentage of CreditScore600To64963.972.872.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value1216139.911
Percentage of CreditScore600To649149.3219.8162.6129.3

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value211621
Percentage of CreditScore600To649263.5219.0269.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value3.7073.8484.0974.077
Percentage of CreditScore600To64945.550.550.453.2

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value1.5892.0742.9263.0882.9633.0254.6485.7694.9916.538
Percentage of CreditScore600To64919.525.539.940.336.938.659.968.752.558.2

ibcp:CreditScore600To649 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value4.1152.7622.9542.6022.7512.5042.3192.3342.422.1980.2980.2
Percentage of CreditScore600To64954.035.235.535.535.933.031.130.130.128.23.52.1

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value1.3911.7670.960.9920.8350.9070.7540.863
Percentage of CreditScore600To64918.221.213.112.911.211.39.610.7

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value2.0132.0742.2412.5973.0884.1424.493.0254.795.1435.7696.2186.5254.9344.9915.666
Percentage of CreditScore600To64926.425.528.631.240.354.660.238.659.566.168.70.00.00.052.50.0

ibcp:CreditScore650To699 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScore650To699

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value4041412829272826252526252524252426
Percentage of CreditScore650To699100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value114119119108114119114126116113106101938377797779808183
Percentage of CreditScore650To699281.3292.0288.5376.8389.4432.2406.4484.6454.0443.3400.6392.8361.6336.1307.70.00.00.0325.20.0318.1

ibcp:CreditScore650To699 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value111111108.3879.1799.1647.559
Percentage of CreditScore650To69928.227.627.837.632.834.535.530.2

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value21229.849.2479.2588.9130.4990.615
Percentage of CreditScore650To69953.654.634.936.134.835.62.02.3

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value7.4277.2675.564.9184.0934.273.6273.4333.205
Percentage of CreditScore650To69918.217.619.217.515.716.114.013.812.8

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value111513
Percentage of CreditScore650To69928.137.133.9

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value36373128
Percentage of CreditScore650To69988.892.576.5101.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value464351
Percentage of CreditScore650To699115.2105.4124.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value11141411
Percentage of CreditScore650To69929.334.434.640.3

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value8.1098.0639.8539.945111212131720
Percentage of CreditScore650To69919.919.535.735.345.845.748.255.070.777.3

ibcp:CreditScore650To699 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value2210109.8619.84109.6968.998.8948.9050.6240.499
Percentage of CreditScore650To69955.135.735.435.834.938.338.034.834.335.72.52.0

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value7.1165.7284.8584.9184.1264.1784.273.825
Percentage of CreditScore650To69917.319.517.617.516.116.316.114.7

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value9.288.0637.6128.0749.9459.2719.246121313131313161716
Percentage of CreditScore650To69922.619.526.327.435.335.536.245.750.454.255.00.00.00.070.70.0

ibcp:CreditScore700To749 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScore700To749

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value951019910096898786827370605651484138
Percentage of CreditScore700To749100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value24428628126125425925226324120819818415013512111811310911010098
Percentage of CreditScore700To749255.0282.0282.5260.7264.0289.7286.6303.6294.1283.3280.0305.1268.4264.6248.00.00.00.0264.50.0256.1

ibcp:CreditScore700To749 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value3941413534282520
Percentage of CreditScore700To74941.340.941.640.342.540.842.941.0

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value2627242120130.6940.689
Percentage of CreditScore700To74927.227.327.728.828.327.01.71.8

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value303129242217141111
Percentage of CreditScore700To74931.531.129.928.326.525.423.623.322.6

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value273534
Percentage of CreditScore700To74928.934.934.9

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value9111410669
Percentage of CreditScore700To74995.3112.7106.978.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value829095
Percentage of CreditScore700To74986.489.495.3

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value29313033
Percentage of CreditScore700To74930.431.130.837.9

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value13141617212225243132
Percentage of CreditScore700To74914.114.718.019.629.031.242.450.676.385.2

ibcp:CreditScore700To749 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value272523242423221614140.8210.694
Percentage of CreditScore700To74927.025.024.827.527.727.527.827.226.127.41.71.7

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value3228252421181712
Percentage of CreditScore700To74932.129.328.628.325.625.525.423.1

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value14141515172121222524243031313133
Percentage of CreditScore700To74913.914.715.316.319.624.425.731.245.847.050.60.00.00.076.30.0

ibcp:CreditScore750To799 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScore750To799

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value2362482442482382142082031891641581461381211149781
Percentage of CreditScore750To799100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value438457474485492469476436406372360316262213195182169173167142139
Percentage of CreditScore750To799186.0184.2194.2195.1206.5218.5228.0214.4214.4227.2227.8215.4189.0176.1171.40.00.00.0172.00.0170.9

ibcp:CreditScore750To799 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value11212011810088736750
Percentage of CreditScore750To79947.848.448.547.946.846.345.944.3

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value3537312828210.5310.583
Percentage of CreditScore750To79914.915.415.117.218.019.20.50.7

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value888890747252483935
Percentage of CreditScore750To79937.336.136.435.535.533.332.832.331.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value808384
Percentage of CreditScore750To79933.933.634.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value219209198167
Percentage of CreditScore750To79992.884.281.380.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value6987111
Percentage of CreditScore750To79929.635.345.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value44485056
Percentage of CreditScore750To79918.719.420.526.8

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value25293436353633414045
Percentage of CreditScore750To79911.012.016.117.521.522.822.736.842.056.5

ibcp:CreditScore750To799 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value373534313132302624220.7930.531
Percentage of CreditScore750To79915.214.314.614.815.115.816.118.117.818.40.70.5

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value9085767466565244
Percentage of CreditScore750To79936.435.935.535.535.134.533.332.4

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value28293132363232363440413839394042
Percentage of CreditScore750To79911.612.012.613.817.516.017.122.825.133.536.80.00.00.042.00.0

ibcp:CreditScoreByInvestment us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScoreByInvestment

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value463467460464445407396395372325316319309275266234
Percentage of CreditScoreByInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value10461074110310741090104810461060992892852784677583540525508502
Percentage of CreditScoreByInvestment225.8229.6239.5231.3244.9257.0264.3268.5266.3273.7269.1245.6219.0212.1203.10.00.0214.2

ibcp:CreditScoreByInvestment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value206205203169159129131102
Percentage of CreditScoreByInvestment44.644.044.142.942.741.041.138.6

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-31
Value98103857575622.179
Percentage of CreditScoreByInvestment21.422.621.723.023.723.40.9

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value15715315312512392937874
Percentage of CreditScoreByInvestment34.033.332.931.831.229.329.428.628.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value162167169
Percentage of CreditScoreByInvestment35.135.736.8

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value424438401313
Percentage of CreditScoreByInvestment91.693.787.279.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value287288347
Percentage of CreditScoreByInvestment62.161.775.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value106114116119
Percentage of CreditScoreByInvestment23.024.425.330.2

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-31
Value64687881879093103116
Percentage of CreditScoreByInvestment13.914.819.220.626.828.629.238.749.4

ibcp:CreditScoreByInvestment us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-31
Value1039491888585827371632.778
Percentage of CreditScoreByInvestment22.120.220.521.821.721.722.223.023.023.21.0

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value158144130125113989289
Percentage of CreditScoreByInvestment33.932.431.931.830.430.229.328.9

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value66687074818484909699103107109116
Percentage of CreditScoreByInvestment14.114.815.216.820.621.522.628.631.136.338.70.00.049.4

ibcp:CreditScoreUnder500 us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScoreUnder500

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value0.6950.5450.6150.4860.5320.4660.5480.4750.4420.2950.3770.3530.3670.5520.6341.0011.303
Percentage of CreditScoreUnder500100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value4.0924.1553.9724.4244.9373.1913.1552.0622.0933.7283.4634.2034.3645.5995.7716.1096.4095.5935.7715.7048.074
Percentage of CreditScoreUnder500588.8762.4645.9910.3928.0684.8575.7434.1473.51263.7918.61190.71189.11014.3910.30.00.00.0576.50.0619.6

ibcp:CreditScoreUnder500 us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value0.3450.2920.3090.2660.0450.0570.0640.073
Percentage of CreditScoreUnder50049.653.650.248.510.215.118.111.5

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value0.240.2840.2180.1420.1940.2110.0230.028
Percentage of CreditScoreUnder50034.546.239.848.151.533.32.32.1

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value0.110.0220.0390.0070.0210.0060.0110.0160.016
Percentage of CreditScoreUnder50015.83.68.01.34.41.63.12.92.5

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value1.3330.5060.533
Percentage of CreditScoreUnder500191.892.886.7

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value0.01.3990.6410.647
Percentage of CreditScoreUnder5000.0256.7104.2118.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value2.0321.6742.208
Percentage of CreditScoreUnder500292.4307.2359.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value0.5360.4990.5110.382
Percentage of CreditScoreUnder50077.191.683.169.7

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value0.1910.0790.1410.1430.2660.2690.0890.0920.5540.875
Percentage of CreditScoreUnder50027.512.830.326.190.271.425.214.555.367.2

ibcp:CreditScoreUnder500 us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value0.2310.1560.1870.1490.2180.1520.1740.130.1330.1560.0240.023
Percentage of CreditScoreUnder50042.432.135.232.039.832.039.436.836.228.33.82.3

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value0.0220.0420.0060.0070.0220.0050.0060.012
Percentage of CreditScoreUnder5004.07.91.31.35.01.71.63.3

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value0.0770.0790.080.0810.1430.0840.0850.2690.090.0910.0920.5960.60.5480.5540.992
Percentage of CreditScoreUnder50014.112.816.515.226.117.719.271.424.516.514.50.00.00.055.30.0

ibcp:CreditScoreUnknown us-gaap:FinancingReceivablePortfolioSegment

ibcp:CreditScoreUnknown

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.5380.7561.2041110129.6910127.0176.6427.4625.884
Percentage of CreditScoreUnknown100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.00.04.73711109.5881024283016114.599
Percentage of CreditScoreUnknown0.00.0393.498.695.579.1112.6230.4227.6432.6246.5160.078.2

ibcp:CreditScoreUnknown us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value0.00.00.00.0391.3490.0590.2190.15
Percentage of CreditScoreUnknown0.00.00.00.410.70.92.92.5

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-31
Value0.5381.2049.5466.8756.501
Percentage of CreditScoreUnknown100.0100.098.598.097.9

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302016-12-31
Value0.00.00.00.00.0660.0350.1670.114
Percentage of CreditScoreUnknown0.00.00.00.00.60.52.21.9

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value0.00.01.569
Percentage of CreditScoreUnknown0.00.0130.3

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value0.00.00.511.762
Percentage of CreditScoreUnknown0.00.042.418.2

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value0.00.01.259
Percentage of CreditScoreUnknown0.00.0104.6

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value0.00.00.0691.15
Percentage of CreditScoreUnknown0.00.05.711.9

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-31
Value0.01.331.8071.912.9041.6591.6681.711
Percentage of CreditScoreUnknown0.0110.514.919.741.425.022.429.1

ibcp:CreditScoreUnknown us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302016-12-31
Value0.7561110129.5469.4799.6597.045.57
Percentage of CreditScoreUnknown100.099.999.399.498.589.276.894.394.7

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-31
Value0.00.00.00.00.0740.040.035
Percentage of CreditScoreUnknown0.00.00.00.00.60.60.5

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312016-12-31
Value0.01.331.2561.4431.913.1082.2621.6591.711
Percentage of CreditScoreUnknown0.0110.510.913.719.729.318.025.029.1

ibcp:DisallowedDeferredTaxAssets us-gaap:ConsolidatedEntities

ibcp:DisallowedDeferredTaxAssets

ibcp:IndependentBank


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.00.00.00.00.00.0490.0490.0490.8521.9375.1610
Percentage of DisallowedDeferredTaxAssets0.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities


None
Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.00.00.00.00.01.3354.2067.5818.8677.9311112
Percentage of DisallowedDeferredTaxAssets0.00.00.00.00.02724.58583.715471.41040.7409.4215.7110.4

ibcp:DomesticDepositSavingsNoStatedMaturity us-gaap:FairValueByFairValueHierarchyLevel

ibcp:DomesticDepositSavingsNoStatedMaturity

us-gaap:FairValueInputsLevel1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value299325292427242922942276219721432120189118451808176917861740174316871704165916391594162615341501150315001440142914031427136016301617
Percentage of DomesticDepositSavingsNoStatedMaturity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:DomesticDepositSavingsNoStatedMaturity us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value29932529242724292294227621972143212018911845180817691786174017431687170416591639159416261534150115031440
Percentage of DomesticDepositSavingsNoStatedMaturity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value299325292427242922942276219721432120189118451808176917861740174316871704165916391594162615341440
Percentage of DomesticDepositSavingsNoStatedMaturity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:EightHundredsAndAbove us-gaap:FinancingReceivablePortfolioSegment

ibcp:EightHundredsAndAbove

ibcp:InstallmentPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value7662606156504854504240656456564736
Percentage of EightHundredsAndAbove100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResidentialPortfolioSegment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value16913114113114011812114313410010498877269636056575152
Percentage of EightHundredsAndAbove220.6210.8235.6213.3250.6232.6252.0260.1268.2238.1254.1151.6135.3128.9124.10.00.00.0119.20.0143.1

ibcp:EightHundredsAndAbove us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302020-03-312019-12-312018-12-312018-06-302017-12-312017-09-302016-12-31
Value3828282023152621
Percentage of EightHundredsAndAbove50.746.246.643.246.037.940.238.0

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-312018-12-312018-03-312017-12-312016-12-312015-12-312014-12-31
Value8.5647.6116.2725.8087.068.9110.0580.06
Percentage of EightHundredsAndAbove11.212.713.113.717.215.80.10.2

ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302017-03-312016-12-31
Value292424202216262223
Percentage of EightHundredsAndAbove38.140.739.442.141.140.940.440.740.9

us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value342324
Percentage of EightHundredsAndAbove44.437.140.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value61504833
Percentage of EightHundredsAndAbove79.980.680.669.4

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-31
Value453443
Percentage of EightHundredsAndAbove59.855.372.9

us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value14131311
Percentage of EightHundredsAndAbove18.520.923.123.1

us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-312019-03-312018-12-312018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value131110109.7591111101314
Percentage of EightHundredsAndAbove18.118.421.422.723.128.417.418.629.139.5

ibcp:EightHundredsAndAbove us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment

ibcp:InstallmentOther, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-09-302017-06-302017-03-312016-12-312015-12-31
Value7.6317.146.6836.2346.2726.2235.96210108.5890.0860.058
Percentage of EightHundredsAndAbove12.211.611.912.213.111.311.916.416.015.30.20.1

ibcp:RecreationalVehicleLending, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-06-302019-03-312018-12-312018-06-302018-03-312017-12-312017-06-30
Value2622212020171625
Percentage of EightHundredsAndAbove41.639.642.742.140.241.840.940.1

ibcp:ResortLending, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value10111111101212111110101212131312
Percentage of EightHundredsAndAbove16.918.418.120.922.722.625.028.418.218.518.60.00.00.029.10.0

ibcp:FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI

ibcp:FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI


None
Period End2020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value1010000.0982000.01292000.01430000.01489000.01682000.01806000.01975000.02173000.02159000.02212000.02556000.02739000.02871000.03026000.03175000.03397000.03673000.03827000.04075000.04223000.04183000.04231000.04358000.04798000.0
Percentage of FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI us-gaap:FinancialInstrument

ibcp:SeniorSecurity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value468000.0469000.0601000.0645000.0713000.0756000.0792000.0842000.0887000.0
Percentage of FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI46.347.80.049.949.950.80.050.149.1

ibcp:SuperSeniorSecurity


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value542000.0513000.0603000.0647000.0700000.0714000.0741000.0808000.0873000.0
Percentage of FairValuePrivateLabelMortgageBackedSecuritiesCurrentlyBelowInvestmentGradeWithCreditRelatedOTTI53.752.20.050.149.048.00.048.048.3

ibcp:FinancingReceivableGovernmentGuaranteedLoans us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:FinancingReceivableGovernmentGuaranteedLoans

ibcp:CommercialAndIndustrial


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value53000.053000.077000.097000.0
Percentage of FinancingReceivableGovernmentGuaranteedLoans100.0100.0100.0100.0

ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value551000.0623000.0569000.0363000.0
Percentage of FinancingReceivableGovernmentGuaranteedLoans1039.61175.5739.0374.2

ibcp:FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities, us-gaap:UnusualOrInfrequentItem

ibcp:FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding

ibcp:InstallmentPortfolioSegment, ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram, ibcp:COVID19


None
Period End2020-06-30
Value7.459
Percentage of FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding100.0

ibcp:MortgageLoansServicedForOthers, ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram, ibcp:COVID19


None
Period End2020-06-30
Value114
Percentage of FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding1539.6

us-gaap:CommercialPortfolioSegment, ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram, ibcp:COVID19


None
Period End2020-06-30
Value210
Percentage of FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding2821.9

us-gaap:ResidentialPortfolioSegment, ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram, ibcp:COVID19


None
Period End2020-06-30
Value81
Percentage of FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding1088.8

ibcp:FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding us-gaap:LoansInsuredOrGuaranteedByGovernmentAuthorities, us-gaap:UnusualOrInfrequentItem

ibcp:SmallBusinessAdministrationSBACARESActPaycheckProtectionProgram, ibcp:COVID19


None
Period End2020-06-30
Value299
Percentage of FinancingReceivableModificationsByOtherThanTroubledDebtRestructuringsLoansOutstanding4010.7

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans us-gaap:FinancialInstrumentPerformanceStatus

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans

us-gaap:NonperformingFinancingReceivable


None
Period End2020-06-302020-03-312019-12-312018-12-31
Value12169.5328.574
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans100.0100.0100.0100.0

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:NonperformingFinancingReceivable, ibcp:InstallmentPortfolioSegment, ibcp:BoatLending


None
Period End2020-06-302019-12-31
Value0.1420.332
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans1.23.5

us-gaap:NonperformingFinancingReceivable, ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther


None
Period End2020-06-302019-12-31
Value0.3860.47
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans3.14.9

us-gaap:NonperformingFinancingReceivable, ibcp:InstallmentPortfolioSegment, ibcp:RecreationalVehicleLending


None
Period End2020-06-302019-12-31
Value0.0740.003
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans0.60.0

us-gaap:NonperformingFinancingReceivable, us-gaap:CommercialPortfolioSegment, ibcp:CommercialAndIndustrial


None
Period End2020-06-302019-12-31
Value1.2510.565
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans10.15.9

us-gaap:NonperformingFinancingReceivable, us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan


None
Period End2020-06-302019-12-31
Value3.5830.735
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans29.07.7

us-gaap:NonperformingFinancingReceivable, us-gaap:ResidentialPortfolioSegment, ibcp:Family14NonOwnerOccupied


None
Period End2020-06-302020-03-312019-12-31
Value1.5731.1221.039
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans12.76.710.9

us-gaap:NonperformingFinancingReceivable, us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo


None
Period End2020-06-302019-12-31
Value0.7511.179
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans6.112.4

us-gaap:NonperformingFinancingReceivable, us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo


None
Period End2020-06-302019-12-31
Value2.7943.54
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans22.637.1

us-gaap:NonperformingFinancingReceivable, us-gaap:ResidentialPortfolioSegment, ibcp:Family14SecondLien


None
Period End2020-06-302019-12-31
Value1.3810.979
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans11.210.3

us-gaap:NonperformingFinancingReceivable, us-gaap:ResidentialPortfolioSegment, ibcp:ResortLending


None
Period End2020-06-302019-12-31
Value0.4040.69
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans3.37.2

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment, us-gaap:NonperformingFinancingReceivable, ibcp:CommercialAndIndustrial


None
Period End2020-03-31
Value1.285
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans7.7

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancialInstrumentPerformanceStatus

ibcp:InstallmentPortfolioSegment, ibcp:InstallmentOther, us-gaap:NonperformingFinancingReceivable


None
Period End2020-03-312019-12-31
Value0.4570.47
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans2.74.9

us-gaap:CommercialPortfolioSegment, ibcp:CommercialRealEstateLoan, us-gaap:NonperformingFinancingReceivable


None
Period End2020-03-312018-12-31
Value7.7560.778
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans46.29.1

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedJumbo, us-gaap:NonperformingFinancingReceivable


None
Period End2020-03-31
Value2.356
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans14.0

us-gaap:ResidentialPortfolioSegment, ibcp:Family14OwnerOccupiedNonJumbo, us-gaap:NonperformingFinancingReceivable


None
Period End2020-03-312019-12-31
Value1.8043.54
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans10.837.1

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment

ibcp:RecreationalVehicleLending, us-gaap:NonperformingFinancingReceivable, ibcp:InstallmentPortfolioSegment


None
Period End2020-03-312019-12-31
Value0.0840.003
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans0.50.0

ibcp:ResortLending, us-gaap:NonperformingFinancingReceivable, us-gaap:ResidentialPortfolioSegment


None
Period End2020-03-31
Value0.438
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans2.6

ibcp:FinancingReceivableRecordedInvestmentNonPerformingLoans us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancialInstrumentPerformanceStatus

ibcp:BoatLending, ibcp:InstallmentPortfolioSegment, us-gaap:NonperformingFinancingReceivable


None
Period End2020-03-312018-12-31
Value0.150.166
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans0.91.9

ibcp:Family14SecondLien, us-gaap:ResidentialPortfolioSegment, us-gaap:NonperformingFinancingReceivable


None
Period End2020-03-312019-12-312018-12-31
Value1.3260.9790.493
Percentage of FinancingReceivableRecordedInvestmentNonPerformingLoans7.910.35.7

ibcp:ImpairedFinancingReceivables

ibcp:ImpairedFinancingReceivables


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value62635553555758616463656871737981868788103106109112116119123125150
Percentage of ImpairedFinancingReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:ImpairedLoansFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

ibcp:ImpairedLoansFairValue

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, ibcp:ImpairedLoansCommercial


None
Period End2020-06-302019-12-312018-12-31
Value130.9712.566
Percentage of ImpairedLoansFairValue100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, ibcp:ImpairedLoansMortgageAndInstallment


None
Period End2020-06-302019-12-31
Value1.3842.467
Percentage of ImpairedLoansFairValue10.3254.1

ibcp:ImpairedLoansFairValue us-gaap:FinancialInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

ibcp:ImpairedLoansMortgageAndInstallment, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


None
Period End2020-03-312019-12-31
Value2.1352.467
Percentage of ImpairedLoansFairValue0.0254.1

ibcp:ImpairedLoansFairValue us-gaap:FinancialInstrument, us-gaap:FairValueByMeasurementFrequency, us-gaap:FairValueByFairValueHierarchyLevel

ibcp:ImpairedLoansCommercial, us-gaap:FairValueMeasurementsNonrecurring, us-gaap:FairValueInputsLevel3


None
Period End2020-03-31
Value14
Percentage of ImpairedLoansFairValue0.0

ibcp:ImpairedLoansFairValue us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

ibcp:CommercialRealEstateLoan


None
Period End2020-06-30
Value0.47
Percentage of ImpairedLoansFairValue3.5

ibcp:InterestBearingDepositsTime

ibcp:InterestBearingDepositsTime


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.00.00.350.4990.4980.4960.5950.5932.4781.7382.7393.4895.3395.345.5917.2338.5610111310111314151617168.6986.9730.0
Percentage of InterestBearingDepositsTime0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

ibcp:InterestBearingDepositsWithBanksFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

ibcp:InterestBearingDepositsWithBanksFairValueDisclosure

us-gaap:FairValueInputsLevel1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value8.44721124320384617221317152439477526102315314552578707492170124403358
Percentage of InterestBearingDepositsWithBanksFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:InterestBearingDepositsWithBanksFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value8.44721124320384617221317152439477526102315314552570
Percentage of InterestBearingDepositsWithBanksFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value8.44721124320384617221317152439477526102315314552570
Percentage of InterestBearingDepositsWithBanksFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:LoansAndLeasesReceivableRecordedInvestment

ibcp:LoansAndLeasesReceivableRecordedInvestment


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value2875272627332730271526272591257024752077202519431817167516131612158615431519147214141381136413791384139113951423
Percentage of LoansAndLeasesReceivableRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:NetLoansAndLoansHeldForSaleFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

ibcp:NetLoansAndLoansHeldForSaleFairValueDisclosure

us-gaap:FairValueInputsLevel1


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.00.00.00.00.00.0410.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of NetLoansAndLoansHeldForSaleFairValueDisclosure0.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value8364691256243444164343947457067383128272530302322231420273537509496
Percentage of NetLoansAndLoansHeldForSaleFairValueDisclosure0.00.00.00.00.00.0107.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value278925802699271626842572252024912413202619231862175216181562156315351485144414101404138613701355134413231312132813201300134913431345
Percentage of NetLoansAndLoansHeldForSaleFairValueDisclosure0.00.00.00.00.00.06076.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ibcp:NetLoansAndLoansHeldForSaleFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value29152750276828202743263626432579250720822035196318361721165516231591154415201468145514291407139413721362
Percentage of NetLoansAndLoansHeldForSaleFairValueDisclosure0.00.00.00.00.00.06375.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value287326452768284127472615260625332477206019621909179816891629160115661513147214351435141613941333
Percentage of NetLoansAndLoansHeldForSaleFairValueDisclosure0.00.00.00.00.00.06284.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

ibcp:NonTroubledDebtRestructuringAllowanceBasedOnCollateral

ibcp:NonTroubledDebtRestructuringAllowanceBasedOnCollateral


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value5.572113.3651.9692.5363.3532.1450.1680.090.00.1480.2020.2620.2860.4910.9020.3980.26
Percentage of NonTroubledDebtRestructuringAllowanceBasedOnCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:NonTroubledDebtRestructuringAllowancesBasedOnCollateral

ibcp:NonTroubledDebtRestructuringAllowancesBasedOnCollateral


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1234000.02891000.0972000.0683000.0881000.01270000.0692000.075000.040000.0066000.091000.036000.053000.0138000.0304000.0211000.076000.0
Percentage of NonTroubledDebtRestructuringAllowancesBasedOnCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:NonTroubledDebtRestructuringImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance

ibcp:NonTroubledDebtRestructuringImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1542000.01318000.01550000.01144000.0500000.0798000.002402000.02555000.0164000.0175000.0186000.0001107000.0133000.0542000.0203000.0
Percentage of NonTroubledDebtRestructuringImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

ibcp:OtherRealEstateImpairedNetReserves

ibcp:OtherRealEstateImpairedNetReserves


None
Period End2020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value500000.0500000.060000.0100000.0100000.0200000.0200000.0100000.0100000.0200000.0300000.050000.0200000.03200000.03200000.03200000.0300000.0700000.01000000.01900000.0
Percentage of OtherRealEstateImpairedNetReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ibcp:OtherRealEstateMeasurementInput us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:Range, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

ibcp:OtherRealEstateMeasurementInput

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, srt:Maximum, ibcp:OtherRealEstateMortgage, us-gaap:MeasurementInputComparabilityAdjustment, ibcp:SalesComparisonApproach


None
Period End2020-03-31
Value0.106
Percentage of OtherRealEstateMeasurementInput100.0

ibcp:OtherRealEstateMeasurementInput us-gaap:MeasurementInputType, us-gaap:FinancialInstrument, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique, us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:MeasurementInputComparabilityAdjustment, ibcp:OtherRealEstateMortgage, us-gaap:FairValueMeasurementsNonrecurring, ibcp:SalesComparisonApproach, srt:WeightedAverage, us-gaap:FairValueInputsLevel3


None
Period End2020-03-31
Value-0.042
Percentage of OtherRealEstateMeasurementInput-39.6

ibcp:OtherRealEstateMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

srt:Maximum, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, ibcp:OtherRealEstateMortgage, us-gaap:MeasurementInputComparabilityAdjustment, ibcp:SalesComparisonApproach


None
Period End2020-06-302019-12-31
Value0.1060.05
Percentage of OtherRealEstateMeasurementInput0.00.0

srt:Minimum, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, ibcp:OtherRealEstateMortgage, us-gaap:MeasurementInputComparabilityAdjustment, ibcp:SalesComparisonApproach


None
Period End2020-06-302019-12-31
Value-0.161-0.116
Percentage of OtherRealEstateMeasurementInput0.00.0

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, ibcp:OtherRealEstateMortgage, us-gaap:MeasurementInputComparabilityAdjustment, ibcp:SalesCompa