ESS


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued
us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:CommonStockSharesOutstanding
us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:CommonStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
dei:LegalEntity

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
dei:LegalEntity

us-gaap:EarningsPerShareBasic
dei:LegalEntity

us-gaap:EarningsPerShareDiluted
dei:LegalEntity

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
dei:LegalEntity

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService

us-gaap:Revenues
dei:LegalEntity

us-gaap:CostsAndExpenses
dei:LegalEntity

us-gaap:GeneralAndAdministrativeExpense
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OperatingIncomeLoss
dei:LegalEntity

us-gaap:InterestExpense
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncomeLossFromContinuingOperations
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
dei:LegalEntity

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:Assets
dei:LegalEntity

us-gaap:Liabilities
dei:LegalEntity

us-gaap:LiabilitiesAndStockholdersEquity
dei:LegalEntity

us-gaap:StockholdersEquity

us-gaap:CashAndCashEquivalentsAtCarryingValue
dei:LegalEntity

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:MinorityInterest
dei:LegalEntity

us-gaap:StockholdersEquity

us-gaap:CommonStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:ProceedsFromIssuanceOfLongTermDebt
dei:LegalEntity

us-gaap:RepaymentsOfLongTermDebt
dei:LegalEntity

us-gaap:PaymentsForRepurchaseOfCommonStock
dei:LegalEntity

us-gaap:RepaymentsOfLongTermDebt
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:ShareBasedCompensation
dei:LegalEntity

us-gaap:OperatingLeaseRightOfUseAsset
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
dei:LegalEntity

ess:CapitalizedInternalCostsRelatedToDevelopmentAndRedevelopmentProjects

ess:CorporatePropertyManagementExpenses
dei:LegalEntity
us-gaap:LongtermDebtType
ess:DebtInstrumentTermsNumberOfExtensionOptions
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ess:EquityMethodInvestmentOwnershipPercentageAcquired

ess:EquityMethodInvestmentsPreferredReturnsRate

ess:GainLossFromEquityMethodInvestments
dei:LegalEntity

ess:GainOnRemeasurementOfCoInvestment
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ConsolidatedEntities, us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
ess:IncomeEffectOfDilutiveSecurities

ess:IncomeFromContinuingOperationsAvailableToCommonStockholders1
dei:LegalEntity

ess:IncrementalCommonSharesAttributableToDilutiveEffectOfConversionOfUnits

ess:InitialRecognitionInOperatingLeaseLiabilities
dei:LegalEntity
us-gaap:InvestmentType, us-gaap:SubsequentEventType
ess:LimitedPartnershipInterestInPartnershipInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:RelatedPartyTransactionsByRelatedParty
ess:ManagementAndOtherFeesFromAffiliates

ess:NetOperatingIncomeFromSegments
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ess:NumberOfCommunitiesHeldByEquityMethodInvestment
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ess:NumberOfUnitsHeldByEquityMethodInvestment
dei:LegalEntity
ess:PartnersCapitalAccountStockAndUnitBasedCompensationCosts
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
dei:LegalEntity
ess:PartnersCapitalAccountStockAndUnitBasedCompensationPlans
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
ess:PartnersCapitalAccountUnitsStockAndUnitBasedCompensationPlan
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
ess:PartnersCapitalAccountUnitsStockandunitbasedcompensationcosts

ess:PaymentsForProceedsFromSalesAndMaturitiesOfMarketableSecurities
dei:LegalEntity

ess:ReclassificationFromToRedeemableNoncontrollingInterest
dei:LegalEntity

ess:RedemptionsOfNoncontrollingInterest
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
ess:RedemptionsOfNoncontrollingInterestShares
us-gaap:StatementEquityComponents

ess:RedevelopmentExpenditures
dei:LegalEntity
us-gaap:RelatedPartyTransactionsByRelatedParty
ess:RelatedPartyTransactionRevenuesfromDevelopmentandRedevelopmentFees

ess:RevenueGeneratingCapitalExpenditures
dei:LegalEntity

ess:StockOptionAndRestrictedStockPlans
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
ess:StockOptionAndRestrictedStockPlansShares

ess:TransferFromRealEstateUnderDevelopmentToCoInvestments
dei:LegalEntity

ess:TransferFromRealEstateUnderDevelopmentToRentalProperties
dei:LegalEntity
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
srt:MortgageLoansOnRealEstateInterestRate

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfDebtDiscountPremium
dei:LegalEntity
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities, dei:LegalEntity

us-gaap:BusinessCombinationAcquisitionRelatedCosts
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
dei:LegalEntity

us-gaap:CommonStockDividendsPerShareCashPaid
dei:LegalEntity
us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:CostOfOtherPropertyOperatingExpense
dei:LegalEntity
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:VariableRate
us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:Depreciation
dei:LegalEntity

us-gaap:DepreciationAndAmortization
dei:LegalEntity

us-gaap:DerivativeGainOnDerivative
dei:LegalEntity

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:EquityMethodInvestmentDividendsOrDistributions
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCostOfSales
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationRevenue

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
dei:LegalEntity
us-gaap:FinancialInstrument
us-gaap:IncomeStatementLocation

us-gaap:GainLossOnSaleOfInvestments
dei:LegalEntity

us-gaap:GainsLossesOnExtinguishmentOfDebt
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:IncomeLossAttributableToParent
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:IncomeLossFromEquityMethodInvestments
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherReceivables
dei:LegalEntity

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
dei:LegalEntity

us-gaap:IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities
dei:LegalEntity

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
dei:LegalEntity

us-gaap:InterestAndOtherIncome
dei:LegalEntity

us-gaap:InterestPaidCapitalized
dei:LegalEntity

us-gaap:InterestPaidNet
dei:LegalEntity

us-gaap:InvestmentIncomeAmortizationOfDiscount
dei:LegalEntity
us-gaap:Ownership
us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest

us-gaap:MarketableSecuritiesRealizedGainLoss

us-gaap:MinorityInterestChangeInRedemptionValue
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterestIncreaseFromBusinessCombination
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:InvestmentType, us-gaap:SubsequentEventType
us-gaap:NumberOfBusinessesAcquired

us-gaap:OperatingLeaseLeaseIncome
dei:LegalEntity
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ProductOrService
us-gaap:ProductOrService

us-gaap:OperatingLeasePayments
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:OtherDepreciationAndAmortization
dei:LegalEntity
us-gaap:PartnersCapitalAccountDistributions
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:PaymentOfFinancingAndStockIssuanceCosts
dei:LegalEntity

us-gaap:PaymentsForRepurchaseOfRedeemableNoncontrollingInterest
dei:LegalEntity

us-gaap:PaymentsOfDistributionsToAffiliates
dei:LegalEntity

us-gaap:PaymentsOfOrdinaryDividends
dei:LegalEntity

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation
dei:LegalEntity

us-gaap:PaymentsToAcquireEquityMethodInvestments
dei:LegalEntity

us-gaap:PaymentsToAcquireMarketableSecurities
dei:LegalEntity

us-gaap:PaymentsToAcquireRealEstate
dei:LegalEntity

us-gaap:PaymentsToDevelopRealEstateAssets
dei:LegalEntity

us-gaap:PaymentsToMinorityShareholders
dei:LegalEntity
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:ProceedsFromCollectionOfNotesReceivable
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
dei:LegalEntity

us-gaap:ProceedsFromInsuranceSettlementInvestingActivities
dei:LegalEntity

us-gaap:ProceedsFromIssuanceOfCommonStock
dei:LegalEntity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:ProceedsFromIssuanceOfUnsecuredDebt

us-gaap:ProceedsFromLinesOfCredit
dei:LegalEntity

us-gaap:ProceedsFromSaleAndCollectionOfReceivables
dei:LegalEntity

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromStockOptionsExercised
dei:LegalEntity

us-gaap:ProvisionForLoanLeaseAndOtherLosses
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:RealEstateTaxExpense
dei:LegalEntity
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfLinesOfCredit
dei:LegalEntity

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
dei:LegalEntity

us-gaap:StockIssuedDuringPeriodValueNewIssues
dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockRetiredParValueMethodAmount
dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:TreasuryStockSharesRetired
us-gaap:StatementEquityComponents
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

ess:AssetsRelatedToVariableInterestEntitiesNetIntercompanyEliminations
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
ess:CompanyShareOfEquity

ess:DistributionsInExcessOfAccumulatedEarnings

ess:FixedRateDebtCarryingAmount

ess:FixedRateDebtFairValue

ess:InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

ess:LiabilitiesRelatedToVariableInterestEntitiesNetOfIntercompanyEliminations

ess:MarketableSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax

ess:MarketableSecuritiesAfterAllowanceForCreditLoss
dei:LegalEntity

ess:MarketableSecuritiesAllowanceForCreditLoss
dei:LegalEntity
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, ess:CumulativeEffectPeriodOfAdoption

ess:MarketableSecuritiesAmortizedCost

ess:NumberOfApartmentCommunitiesOwned
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ProductOrService

ess:NumberOfCommunitiesWithinDownreitPartnerships

ess:NumberOfDownreitLimitedPartnershipsConsolidatedByCompany
dei:LegalEntity
ess:OperatingPartnershipUnitsOutstanding

ess:PreferredEquityInvestmentCommitmentToFund

ess:RealEstateDevelopmentInProcess
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
dei:LegalEntity
ess:RedemptionValueOfOperatingPartnershipUnitsOutstanding

ess:TotalRealEstateNet
dei:LegalEntity

ess:UnsecuredDebtAndLineOfCredit

ess:VariableInterestEntityNumberOfConsolidatedCoinvestmentsDeterminedToBeVariableInterestEntities

ess:VariableRateDebtCarryingAmount

ess:VariableRateDebtFairValue

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
dei:LegalEntity

us-gaap:AdditionalPaidInCapital
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:ConstructionPayableCurrentAndNoncurrent
dei:LegalEntity

us-gaap:ContractWithCustomerLiability
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
us-gaap:AdjustmentsForNewAccountingPronouncements, dei:LegalEntity
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, dei:LegalEntity
us-gaap:DebtInstrumentFaceAmount
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeAssetFairValueGrossLiability
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount

us-gaap:DividendsPayableCurrentAndNoncurrent
dei:LegalEntity
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:DueFromAffiliates

us-gaap:DueFromRelatedParties
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity

us-gaap:EquitySecuritiesFvNi
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:EquitySecuritiesFvNiCost

us-gaap:FinancingReceivableAllowanceForCreditLosses
dei:LegalEntity
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, ess:CumulativeEffectPeriodOfAdoption
dei:LegalEntity
us-gaap:GeneralPartnersCapitalAccount
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecurities
us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesFairValue

us-gaap:InvestmentBuildingAndBuildingImprovements
dei:LegalEntity

us-gaap:LandAndLandImprovements
dei:LegalEntity
dei:LegalEntity
us-gaap:LimitedPartnersCapitalAccount

us-gaap:LineOfCredit
dei:LegalEntity
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate

us-gaap:MarketableSecurities

us-gaap:MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure

us-gaap:NoncontrollingInterestInVariableInterestEntity

us-gaap:NotesReceivableNet
dei:LegalEntity
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:OperatingLeaseLiability
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:OtherAssets

us-gaap:OtherLiabilities
dei:LegalEntity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
dei:LegalEntity
us-gaap:PartnersCapital
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity
us-gaap:PartnersCapitalAccountUnits
dei:LegalEntity
us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:PrepaidExpenseAndOtherAssets
dei:LegalEntity

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation
dei:LegalEntity

us-gaap:RealEstateInvestmentPropertyAtCost
dei:LegalEntity

us-gaap:RealEstateInvestmentPropertyNet
dei:LegalEntity
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount
dei:LegalEntity

us-gaap:RestrictedCashAndCashEquivalents
dei:LegalEntity

us-gaap:RevenueRemainingPerformanceObligationPercentage

us-gaap:SecuredDebt
dei:LegalEntity
us-gaap:LongtermDebtType

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:PartnerCapitalComponents, dei:LegalEntity
us-gaap:StatementEquityComponents
us-gaap:LongtermDebtType
us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnsecuredDebt
dei:LegalEntity
us-gaap:LongtermDebtType

Tables

  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:CommonStockValue █████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁7000.07000.07000.07000.07000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.04000.04000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.0NA3000.0NANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁████▁▁▁▁65656666666665656565NANA65NANANA636362383737373736353534033323131300NA0NANA
us-gaap:CommonStockSharesIssued ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██▁▁▁▁▁▁6565666666666565656565656565656463636238373732337317373635353433NANA31313029NA29NANA
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us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁██66656666NA666565NA656565NA656464NA636237NA373737NA353434NA333231NA292929NA3026
 us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding dei:LegalEntity ess:EssexPortfolioL.P.▄▄▄▄68686868NA6868NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁██66656666NA656565NA656565NA656464NA626137NA373737NA353434NA333231NA292928NA2726
 us-gaap:WeightedAverageNumberOfSharesOutstandingBasic dei:LegalEntity ess:EssexPortfolioL.P.▄▄▄▄68686868NA6867NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic █▄▃▃▃▃▂▅▅▂▃▃▃▂▂▂▂▂▁▂▂▄▂▂▃▂▂▂▂▁▁▁▁▁▁▂▁▂▂4.771.811.521.381.571.211.082.732.981.01.11.191.220.650.70.920.630.850.080.580.851.840.670.681.220.461.070.670.420.230.320.270.160.210.320.450.209999999999999960.790.43
 us-gaap:EarningsPerShareBasic dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁▄4.771.811.521.381.571.211.082.73NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted █▄▃▃▃▃▂▅▅▂▃▃▃▂▂▂▂▂▁▂▂▄▂▂▃▂▂▂▂▁▁▁▁▁▁▂▁▂▂4.761.811.521.381.571.211.082.722.981.01.11.191.220.650.70.920.630.850.080.580.851.840.670.681.220.451.070.670.420.230.320.270.160.210.320.450.22000000000000020.740.43
 us-gaap:EarningsPerShareDiluted dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁▄4.761.811.521.381.571.211.082.72NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▁████████▇▇▇▇▇▇▇▆▆▄▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃22348347345344339335329329321314310304296282278270259161156155153149144138132127124120117113109104100101100101103
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax dei:LegalEntity ess:EssexPortfolioL.P.▄▄22NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax █▇▇▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁392356348347345344339335329329321314310304296282278270259161156155153149144138132127124120117113109104100101100101103
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ess:RentalAndOtherPropertyRevenues,ess:NorthernCalifornia█▃▂▂▂▂▂▁164136129128127127126123NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ess:RentalAndOtherPropertyRevenues,ess:SeattleMetro█▅▃▃▃▃▂▁6360585858585756NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,ess:RentalAndOtherPropertyRevenues,ess:SouthernCalifornia█▇▆▅▁▆▄▅155151150146135148145147NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService ess:RentalAndOtherPropertyRevenues█▄▃▂▂▂▁▁389353346344342341336333NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues █▇▇▇▇▇▇▇▆▆▆▆▆▆▆▅▅▅▅▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁392356348347345344339335329329321314310304296282278270259161156155153149144138132127124120117113109104100101100101103
 us-gaap:Revenues dei:LegalEntity ess:EssexPortfolioL.P.█▃▂▂▂▂▁392356348347345344339NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostsAndExpenses █▇▇▇▇▇▇▇▇▆▆▆▆▇▆▆▆▆▆▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▂▁261240232236232231226226223219215214218221215207214205217127112106104102999591878685848283777270738368
 us-gaap:CostsAndExpenses dei:LegalEntity ess:EssexPortfolioL.P.█▄▂▃▂▂▁261240232236232231226NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▇▇▆█▅▄▅▅▆▄▄▄▃▆▄▅▆▆▄▃▂▂▂▂▂▁▁▁▂▂▂▂▃▂▂▁▄▂▁131311141091010129998119101211976666655566667665965
 us-gaap:GeneralAndAdministrativeExpense dei:LegalEntity ess:EssexPortfolioL.P.▇▇▄█▂▁▂1313111410910NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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us-gaap:OperatingIncomeLoss █▇▇▇▇▇▇▇▆▇▆▆▆▅▅▅▄▄▂▂▃▃▃▃▃▂▂▂▂▂▂▂▁▂▂▂▂▁▂13011511611011211211210910510910599928280756465423344494847454240393834333125272830271835
 us-gaap:OperatingIncomeLoss dei:LegalEntity ess:EssexPortfolioL.P.█▃▃▁▂▂▂130115116110112112112NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense █▇█████████▇█▇▇▆▆▆▅▂▂▂▂▂▂▂▂▂▂▁▁▂▂▁▁▁▁▁▁555356545555565454565552565050474745422626262625252524242522222423222120222121
 us-gaap:InterestExpense dei:LegalEntity ess:EssexPortfolioL.P.▆▁█▃▆▆█55535654555556NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpense us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName ess:TotalCoInvestment▇▆▆▆█▆▆▅▅▅▅▆▅▅▅▅▆▅▅▄▄▄▄▄▅▅▄▁20151316231314111110111311111111149965666997-8NANA10-4NANANANANANANA
us-gaap:IncomeLossFromContinuingOperations █▂▂▂▂▁▁▄▅▁▁▁315118100901037970178195657277NANANANA4053421145624254316371311858469NANANANA
 us-gaap:IncomeLossFromContinuingOperations dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁325123103941078273NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss █▄▃▃▃▃▃▅▅▂▃▃▃▂▂▂▂▂▁▂▂▃▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▁▁328125106961098575187204707686854750644458826367529294920422717111612810131710217
 us-gaap:ProfitLoss dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁▄328125106961098575187NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:PartnerCapitalComponents,us-gaap:PartnerTypeOfPartnersCapitalAccount,dei:LegalEntity ess:CommonEquity,us-gaap:GeneralPartner,ess:EssexPortfolioL.P.█▂▁315118100NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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us-gaap:ComprehensiveIncomeNetOfTax █▄▃▃▃▃▃▅▆▂▃▃▃▂▂▂▂▂▁▁▂▂▂▁▂▁▂▁▁▁▁▁3061171039610983721812036873798943476141578273570312752143626178168NANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTax dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁3161211071001138674NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest █▄▄▃▄▃▃▅▅▂▂▂▃▂▂▂▂▂▁▂▂▃▂▂▂▁▂▂▁▁▁▂136656558944453343323353342332223NANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest dei:LegalEntity ess:EssexPortfolioL.P.▄▄▄▄▄▄▄2222222NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest █▄▃▃▃▃▃▅▆▂▃▃▃▂▂▂▂▂▁▁▂▂▂▁▂▁▂▁▁▁▁▁31912310910211688771892127378849446516545611130397635305716392920101911NANANANANANANA
 us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁3191231091021168877NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▄▃▃▃▃▂▅▅▂▃▃▃▂▂▂▂▂▁▁▂▂▁▁▂▁▂▁▁▁▁▁▁▁▁▁▁▁▁31511810090103797017819565727779424559405342131682425431637221371084691362111
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁▄325123103941078273185NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest █▄▃▃▄▃▃▅▅▂▂▃▂▂▂▂▂▂▁▂▂▃▂▂▂▁▂▂▁▁▁▂▂▂▂▂▂▂▂1365565588445433433233533424322233334334
 us-gaap:NetIncomeLossAttributableToNoncontrollingInterest dei:LegalEntity ess:EssexPortfolioL.P.▄▄▄▄▄▄▄2222222NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:Assets █▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁134501257812555126421249512512125241244712217121771220612067120051201212045120851156211666113486633518650855058493648474534433940514036390538253866373235033324NA3254NANA
 us-gaap:Assets dei:LegalEntity ess:EssexPortfolioL.P.█▁▁134501257812555NA12495NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Liabilities █▇▇▇▇▇▇▇▆▇▆▆▆▆▆▆▆▆▆▂▃▂▂▂▂▂▂▂▂▁▁▂▁▁▁70006223604461096059608860416013588059495947578056225656567657595403555153523071318430873084294729622749262424732478239423742494237322542087NA1976NANA
 us-gaap:Liabilities dei:LegalEntity ess:EssexPortfolioL.P.█▂▁700062236044NA6059NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁134501257812555126421249512512125241244712217121771220612067120051201212045120851156211666113486633518650855058493648474534433940514036390538253866373235033324NA3254NANA
 us-gaap:LiabilitiesAndStockholdersEquity dei:LegalEntity ess:EssexPortfolioL.P.█▁▁134501257812555NA12495NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:StockholdersEquity █████████████████▇▇▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁62286191635463686277626563166264619260886118614162376221623461866022598358582023188418801858187017641665159314571437138813261164114910381019NA1053NANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:CashAndCashEquivalentsAtCarryingValue █▄▅▄▂▂▆▃▃▆▆▂▂▂▂▇▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▃▁▁▁▂▁▃▃27110716012144461838464195182482935302192517171918920301814131298971314822208165
 us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity ess:EssexPortfolioL.P.█▁▃271107160NA44NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▆███▇▇▇▇▇▇▇▇▆▆▆▇▆▆▆▅▄▄▄▄▄▃▃▃▃▂▂▁▁▁▁99713071291129011551124108110711161112211031069103610361044105710361043964716677674618579571477436401383275197133107108137NA70NANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:MinorityInterest ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▂▂▂▂189125120123119118121124100959699991101101141131101131533113113111113115115117115116117119203205206213NA220NANA
 us-gaap:MinorityInterest dei:LegalEntity ess:EssexPortfolioL.P.█▁▁1236364NA66NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:StockholdersEquity █████████████████▇▇▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁62286191635463686277626563166264619260886118614162376221623461866022598358582023188418801858187017641665159314571437138813261164114910381019NA1053NANA
us-gaap:CommonStockValue █████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁7000.07000.07000.07000.07000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.04000.04000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.0NA3000.0NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▇███▇▇▆▆▆▅▅▅▅▄▄▄▄▄▄▃▃▃▃▂▂▁▂▂▂▁▂▁▁▁▂-22-14-11-14-18-24-28-29-32-40-43-44-42-50-50-50-51-51-53-56-60-62-62-68-69-76-72-70-72-75-74-77-77-79-68NA-24NANA
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us-gaap:NetCashProvidedByUsedInOperatingActivities █▇▂█▂▇▂▆▁▆▂▄266255155268144248149223132230149200NANANANANANA9682797464854889577243684757275836522558NA
 us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity ess:EssexPortfolioL.P.█▇▂█▁▇266255155268146251NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▄█▆▆▄▆▆▅▆▆▆-445-21939-98-82-220-83-90-156-83-100-80NANANANANANA-674-51-144-27-175-105-294-201-272-44-165-110-65-84-259-128-45-77-75-48NA
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂▁▂▂▁▄▂▂▁▄▂379-63-156-91-63-16634-113-105-13384-101NANANANANANA436-2973-5710032262109205-2712542-6911023175-426-116NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity ess:EssexPortfolioL.P.█▂▁▂▂▁379-63-156-91-65-165NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities █▇▂█▂▇▂▆▁▆▂▄266255155268144248149223132230149200NANANANANANA9682797464854889577243684757275836522558NA
 us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity ess:EssexPortfolioL.P.█▇▂█▁▇266255155268146251NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss █▄▃▃▃▃▃▅▅▂▃▃▃▂▂▂▂▂▁▂▂▃▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▁▁328125106961098575187204707686854750644458826367529294920422717111612810131710217
 us-gaap:ProfitLoss dei:LegalEntity ess:EssexPortfolioL.P.█▂▂▂▂▁▁▄328125106961098575187NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:PartnerCapitalComponents,us-gaap:PartnerTypeOfPartnersCapitalAccount,dei:LegalEntity ess:CommonEquity,us-gaap:GeneralPartner,ess:EssexPortfolioL.P.█▂▁315118100NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:AccumulatedDistributionsInExcessOfNetIncome█▄▃▃▃▃▂▅▅▂▃▃▃▂▂▂▂▂▁▁▂▂▁▁▂▁▂▁▁▁▁▁▁▁315118100901037970178195657281804346604150623337026264517382415913856NANANANANA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▄█▆▆▄▆▆▅▆▆▆-445-21939-98-82-220-83-90-156-83-100-80NANANANANANA-674-51-144-27-175-105-294-201-272-44-165-110-65-84-259-128-45-77-75-48NA
  2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities █▂▁▂▂▁▄▂▂▁▄▂379-63-156-91-63-16634-113-105-13384-101NANANANANANA436-2973-5710032262109205-2712542-6911023175-426-116NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity ess:EssexPortfolioL.P.█▂▁▂▂▁379-63-156-91-65-165NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProceedsFromIssuanceOfLongTermDebt ▅▅▃▄▃▁▅▆▅▃▅▄▄▄▄▇▅▅█▄▅▃▅▄▅▆▆▄▆▄▅▄▆▅▃▄▄▃49849802980-467410654444524623052771441667563564161087233327373692353975856031596422263413045974035016214977NA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt dei:LegalEntity ess:EssexPortfolioL.P.██▁▅▁▁498498029800NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▄▆▄▄▄▁▆▇▆▄▅▆▅▅▅▇▇▅█▆▅▄▅▅▅▇▇▅▇▅▆▅▆▆▄▅▄▄1023602783101-5443436614377919130927219419353648625076431221341215279174525493177543230469191395323411226550NA
 us-gaap:RepaymentsOfLongTermDebt dei:LegalEntity ess:EssexPortfolioL.P.▃█▁▂▃▁102360278310147NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock █▃▁▁▁▁▁▁17656030000NANANANANANANANANANANANANANANANANANANANANANANANA00NANA00NA
 us-gaap:PaymentsForRepurchaseOfCommonStock dei:LegalEntity ess:EssexPortfolioL.P.█▃▁▁▁▁176560300NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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us-gaap:RepaymentsOfLongTermDebt ▄▆▄▄▄▁▆▇▆▄▅▆▅▅▅▇▇▅█▆▅▄▅▅▅▇▇▅▇▅▆▅▆▆▄▅▄▄1023602783101-5443436614377919130927219419353648625076431221341215279174525493177543230469191395323411226550NA
 us-gaap:RepaymentsOfLongTermDebt dei:LegalEntity ess:EssexPortfolioL.P.▃█▁▂▃▁102360278310147NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType,us-gaap:SubsequentEventType ess:UnsecuredBonds2.650,us-gaap:SeniorNotes,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value7000.07000.07000.07000.07000.07000.07000.07000.07000.07000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.04000.04000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value6566666565656666666666656565656563636238373737373635353403332313130002624
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value656666656565666666666665656565656565656564636362383737323373173736353534333131302929
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value6566666565
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0

us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value22222
Percentage of CommonStockSharesIssued3.53.53.53.53.5

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value656566656565666666666665656565656565656564376362383737323373173733353534312831282828
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value6566666565
Percentage of CommonStockSharesOutstanding100.0100.3100.0100.0100.0

us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value22222
Percentage of CommonStockSharesOutstanding3.53.53.53.53.5

Common Stock Shares Authorized

us-gaap:CommonStockSharesAuthorized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-312010-12-312010-09-302010-06-302009-12-31
Value670670670670670670670670670670670670670670670670656656656656656656656656656656656020656020656656656656641656649649649649649
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

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value666565656666666665656565656564646362373737373534343332312929293026
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value686868686868686868
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding103.5103.5103.5103.5103.4103.4103.4103.4103.4

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value666565656666666565656565656564646261373737373534343332312929282726
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value686868686868686867
Percentage of WeightedAverageNumberOfSharesOutstandingBasic103.5103.5103.5103.5103.4103.4103.4103.4103.4

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value4.771.951.511.41.811.781.231.521.381.571.211.082.732.981.01.11.191.220.650.70.920.630.850.080.580.851.840.670.681.220.461.070.670.420.230.320.270.160.210.320.450.209999999999999960.790.43
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.771.951.511.41.811.781.231.521.381.571.211.082.73
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value4.761.951.511.41.811.781.221.521.381.571.211.082.722.981.01.11.191.220.650.70.920.630.850.080.580.851.840.670.681.220.451.070.670.420.230.320.270.160.210.320.450.22000000000000020.740.43
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.761.951.511.41.811.781.231.521.381.571.211.082.72
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.8100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Basic Share

Income Loss From Continuing Operations Per Diluted Share

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value22348347345344339335329329321314310304296282278270259161156155153149144138132127124120117113109104100101100101103
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value22
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.100.0100.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value392375366361356353350348347345344339335329329321314310304296282278270259161156155153149144138132127124120117113109104100101100101103
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14993.00.00.00.015255.80.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:CorporateNonSegment, ess:RentalAndOtherPropertyRevenues



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
Value666617571120776
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.61.71.81.85.11.72.23.25.92.32.22.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax236.30.00.0269.80.00.02.23.25.92.32.22.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:CorporateNonSegment ess:RentalAndOtherPropertyRevenues0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ess:RentalAndOtherPropertyRevenues, ess:NorthernCalifornia



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
Value164144140136132131129128127127126123
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax41.839.338.738.337.637.537.237.037.037.137.336.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6269.70.00.05838.30.00.037.237.037.037.137.336.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ess:RentalAndOtherPropertyRevenues ess:NorthernCalifornia0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ess:RentalAndOtherPropertyRevenues, ess:SeattleMetro



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
Value636160605959585858585756
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax16.316.816.816.916.916.916.916.916.916.916.816.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2439.60.00.02579.90.00.016.916.916.916.916.816.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ess:RentalAndOtherPropertyRevenues ess:SeattleMetro0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, ess:RentalAndOtherPropertyRevenues, ess:SouthernCalifornia



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
Value155152151151140151150146135148145147
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax39.741.542.042.439.743.343.142.239.443.042.943.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5947.30.00.06467.80.00.043.142.239.443.042.943.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments ess:RentalAndOtherPropertyRevenues ess:SouthernCalifornia0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProductOrService

ess:ManagementAndOtherFeesFromAffiliatesIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2222222222222
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.70.70.70.60.70.70.70.60.70.80.70.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.00.00.00.0100.00.00.00.60.70.80.70.70.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:ManagementAndOtherFeesFromAffiliatesIncome0.00.00.00.00.00.00.00.00.00.00.00.00.0

ess:RentalAndOtherPropertyRevenues



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
Value389364359353350348346344342341336333
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax99.399.399.499.399.399.399.499.399.299.399.399.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14893.00.00.015155.80.00.099.499.399.299.399.399.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:RentalAndOtherPropertyRevenues0.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value392356348347345344339335329329321314310304296282278270259161156155153149144138132127124120117113109104100101100101103
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14993.015255.8100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value392375366361356353350348347345344339
Percentage of Revenues100.00.00.00.0100.00.00.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14993.00.00.00.015255.80.00.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.14993.00.00.00.015255.80.00.00.00.00.00.00.0

Sales Revenue Net

Costs And Expenses

us-gaap:CostsAndExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value261255242237240243237232236232231226226223219215214218221215207214205217127112106104102999591878685848283777270738368
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9993.50.00.00.010301.00.00.066.768.267.467.366.967.467.966.867.168.270.372.972.773.476.875.983.879.171.768.468.368.568.969.069.168.769.271.371.872.376.473.872.069.572.481.866.2

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value261255242237240243237232236232231226
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9993.50.00.00.010301.00.00.066.768.267.467.366.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.9993.50.00.00.010301.00.00.00.00.00.00.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value1315111313161011141091010129998119101211976666655566667665965
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax534.30.00.00.0576.40.00.03.24.33.12.83.03.23.72.93.02.92.93.73.23.74.44.23.74.44.33.94.14.44.73.84.34.25.45.15.45.47.35.96.25.69.86.05.6

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value13151113131610111410910
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax534.30.00.00.0576.40.00.03.24.33.12.83.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.534.30.00.00.0576.40.00.00.00.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value42221112122113111111111110211100000
Percentage of GeneralAndAdministrativeExpense29.218.022.916.114.37.411.821.510.127.625.118.516.825.915.515.913.516.512.015.415.210.516.018.919.62.634.924.722.815.517.416.0-3.10.6-16.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax156.00.00.00.082.60.00.00.70.40.90.70.60.51.00.50.50.40.50.40.50.60.50.70.70.90.11.41.01.00.70.70.7-0.10.0-0.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:TotalCoInvestment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value13011612412411510911311611011211211210910510910599928280756465423344494847454240393834333125272830271835
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4999.50.00.00.04954.80.00.033.331.832.632.733.132.632.133.232.931.829.727.127.326.623.224.116.220.928.331.631.731.531.131.030.931.330.828.728.227.723.626.228.030.527.618.233.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value130116124124115109113116110112112112
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4999.50.00.00.04954.80.00.033.331.832.632.733.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.4999.50.00.00.04954.80.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5554545453545556545555565454565552565050474745422626262625252524242522222423222120222121
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2107.30.00.00.02297.30.00.016.115.816.116.216.816.316.717.217.316.718.216.417.216.817.116.916.216.117.216.817.216.917.918.118.619.320.118.419.421.721.621.220.920.622.121.620.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value555454545354555654555556
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2107.30.00.00.02297.30.00.016.115.816.116.216.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.2107.30.00.00.02297.30.00.00.00.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value201816161517151316231314111110111311111111149965666997-810-4
Percentage of InterestExpense37.833.629.329.728.232.728.624.230.541.724.524.721.821.219.420.125.019.722.621.823.830.921.522.423.119.523.123.126.935.537.731.6-34.746.5-19.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax796.80.00.00.0647.30.00.03.94.86.74.04.13.63.53.33.54.23.63.73.74.05.33.63.63.73.33.94.04.56.36.85.9-6.79.0-4.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:TotalCoInvestment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3151289992118117801009010379701781956572774053421145624254316371311858469
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12036.90.00.00.05090.30.00.028.826.230.023.220.953.459.419.922.424.814.519.81.913.69.636.316.316.930.211.728.010.48.87.14.67.04.25.99.3

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3251331029512312183103941078273
Percentage of IncomeLossFromContinuingOperations103.5103.5103.5103.5103.5103.5103.4103.4103.4103.4103.4103.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12456.70.00.00.05268.90.00.029.827.131.123.921.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.12456.70.00.00.05268.90.00.00.00.00.00.00.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

Income Tax Expense Benefit

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value3281351059812512486106961098575187204707686854750644458826367529294920422717111612810131710217
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12562.70.00.00.05374.90.00.030.527.831.824.722.455.962.221.323.927.727.615.517.122.916.121.73.216.323.648.719.319.934.314.632.121.314.39.213.711.07.910.013.817.610.52.316.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3281351059812512486106961098575187
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12562.70.00.00.05374.90.00.030.527.831.824.722.455.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.12562.70.00.00.05374.90.00.00.00.00.00.00.00.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value21222222
Percentage of ProfitLoss0.81.42.72.62.02.02.72.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.00.00.00.0106.00.00.00.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value315128999211811780100
Percentage of ProfitLoss95.895.394.094.194.794.794.094.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12036.90.00.00.05090.30.00.028.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:CommonEquity us-gaap:GeneralPartner ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.0

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value104334423
Percentage of ProfitLoss3.33.33.33.33.33.33.23.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax419.80.00.00.0178.60.00.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:CommonEquity us-gaap:LimitedPartner ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDistributionsInExcessOfNetIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value315128999211811780100901037970178195657281804346604150623337026264517382415913856
Percentage of ProfitLoss95.895.394.094.194.794.794.094.494.194.593.893.495.495.693.493.794.294.492.592.793.793.386.574.888.290.192.589.089.591.087.090.588.485.781.785.671.661.766.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12036.90.00.00.05090.30.00.028.826.230.023.220.953.459.419.922.426.026.014.315.821.515.018.82.414.421.345.017.217.831.212.729.018.812.27.511.77.94.96.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedDistributionsInExcessOfNetIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1366566555655884454334332335334243222333
Percentage of ProfitLoss4.24.76.05.95.35.36.05.65.95.56.26.64.64.46.66.35.85.67.57.36.37.46.325.211.89.97.511.010.59.013.09.511.614.418.314.428.438.333.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax525.80.00.00.0284.70.00.01.71.61.81.51.52.62.71.41.51.61.61.21.21.41.21.40.81.92.33.72.12.13.11.93.02.52.11.72.03.13.03.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value3061339988117113831039610983721812036873798943476141578273570312752143626178168
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11701.40.00.00.05014.30.00.029.727.931.824.221.354.061.920.822.725.428.714.316.121.715.021.23.416.922.645.120.718.436.210.227.220.614.27.314.27.4

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value31613810291121117861071001138674
Percentage of ComprehensiveIncomeNetOfTax103.5103.5103.5103.5103.5103.5103.4103.4103.4103.4103.4103.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12109.50.00.00.05190.20.00.030.828.932.925.122.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.12109.50.00.00.05190.20.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value13665665656558944453343323353342332223
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax514.00.00.00.0282.00.00.01.71.71.81.61.52.62.81.41.51.61.61.21.31.41.31.40.82.12.43.72.32.13.41.72.92.62.21.72.13.1

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value212222222222
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest20.628.845.645.437.639.544.841.343.740.147.651.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.00.00.00.0106.00.00.00.70.70.70.80.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.106.00.00.00.0106.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value319140105931231198910910211688771892127378849446516545611130397635305716392920101911
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12215.40.00.00.05296.30.00.031.529.633.625.822.856.664.722.224.327.030.415.417.323.116.222.64.319.025.148.823.020.639.611.930.223.116.48.916.310.5

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value31914010593123119891091021168877
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12215.40.00.00.05296.30.00.031.529.633.625.822.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.12215.40.00.00.05296.30.00.00.00.00.00.00.0

Net Income Loss

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value31512899921181178010090103797017819565727779424559405342131682425431637221371084691362111
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12036.90.00.00.05090.30.00.028.826.230.023.220.953.459.419.922.424.825.613.915.421.014.419.81.913.620.444.116.316.930.211.728.017.811.26.48.87.44.46.19.413.06.721.411.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3251331029512312183103941078273185
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic103.5103.5103.5103.5103.5103.5103.4103.4103.4103.4103.4103.4103.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12456.70.00.00.05268.90.00.029.827.131.123.921.655.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.12456.70.00.00.05268.90.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value136656655565588445433433233533424322233334334
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax525.80.00.00.0284.70.00.01.71.61.81.51.52.62.71.41.51.61.61.21.21.41.21.40.81.92.33.72.12.13.11.93.12.52.11.72.03.13.03.33.84.13.63.54.3

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value212222222222
Percentage of NetIncomeLossAttributableToNoncontrollingInterest20.229.645.644.237.238.545.742.045.341.548.851.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.00.00.00.0106.00.00.00.70.70.70.80.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.106.00.00.00.0106.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value13450127051299712671125781238312518125551264212495125121252412447122171217712206120671200512012120451208511562116661134866335186508550584936484745344339405140363905382538663732350333243254
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value134501270512997126711257812383125181255512495
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets ess:EssexPortfolioL.P.100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value70006264654362896223595460456044610960596088604160135880594959475780562256565676575954035551535230713184308730842947296227492624247324782394237424942373225420871976
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.049.350.349.649.548.148.348.148.348.548.748.248.348.148.948.747.946.847.147.147.746.747.647.246.361.460.761.059.761.160.660.561.161.461.362.164.563.664.362.860.7

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value700062646543628962235954604560446059
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.049.350.349.649.548.148.348.148.5
Percentage of Assets ess:EssexPortfolioL.P.52.049.350.349.649.548.148.348.148.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value13450127051299712671125781238312518125551264212495125121252412447122171217712206120671200512012120451208511562116661134866335186508550584936484745344339405140363905382538663732350333243254
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value134501270512997126711257812383125181255512495
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets ess:EssexPortfolioL.P.100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value62286220622561546191626763166354636862776265631662646192608861186141623762216234618660225983585820231884188018581870176416651593145714371388132611641149103810191053
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets46.349.047.948.649.250.650.550.650.450.250.150.450.350.750.050.150.952.051.851.851.252.151.351.630.536.337.036.737.936.436.736.736.035.635.634.730.130.829.630.732.4

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value27170743810713415716012144461838464195182482935302192517171918920301814131298971314822208165419
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.00.60.60.30.91.11.31.31.00.40.41.50.70.51.61.50.40.20.30.31.80.20.20.20.30.40.20.40.60.40.00.10.30.30.20.22.50.40.40.30.00.60.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value27170743810713415716044
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.00.60.60.30.91.11.31.30.4
Percentage of Assets ess:EssexPortfolioL.P.2.00.60.60.30.91.11.31.30.4

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-08-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-08-312013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value997133514131324130713001267129112901155112410811071116111221103106910361036201044105710361043964716677674861857957147743640138327519713310710813770
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.410.510.910.410.410.510.110.310.29.39.08.68.69.59.29.08.98.68.60.08.78.79.08.98.510.813.113.30.012.211.711.810.510.19.99.57.15.23.42.93.14.12.2

Finite Lived Intangible Assets Net

Long Term Debt

Minority Interest

us-gaap:MinorityInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value189183189190125126119120123119118121124100959699991101101141131101131533113113111113115115117115116117119203205206213220
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.41.51.51.01.01.01.01.01.00.91.01.00.80.80.80.80.80.90.90.91.00.91.023.12.22.22.22.32.42.52.72.92.93.03.15.35.55.96.46.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1231221291296364646466
Percentage of MinorityInterest64.966.868.367.950.750.754.053.655.6
Percentage of Assets0.91.01.01.00.50.50.50.50.5
Percentage of Assets ess:EssexPortfolioL.P.0.91.01.01.00.50.50.50.50.5

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value62286220622561546191626763166354636862776265631662646192608861186141623762216234618660225983585820231884188018581870176416651593145714371388132611641149103810191053
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets46.349.047.948.649.250.650.550.650.450.250.150.450.350.750.050.150.952.051.851.851.252.151.351.630.536.337.036.737.936.436.736.736.035.635.634.730.130.829.630.732.4

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value7000.07000.07000.07000.07000.07000.07000.07000.07000.07000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.06000.04000.04000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
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

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value-22-13-19-18-14-13-8-11-14-18-24-28-29-32-40-43-44-42-50-50-50-51-51-53-56-60-62-62-68-69-76-72-70-72-75-74-77-77-79-68-24
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.3-0.3-0.4-0.4-0.3-0.4-0.4-0.4-0.4-0.4-0.5-0.9-1.2-1.2-1.2-1.4-1.4-1.7-1.7-1.7-1.8-1.9-2.0-2.0-2.1-2.3-2.1-0.7

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-19-10-15-15-11-9-4-7-15
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax86.175.182.882.776.973.757.469.182.6
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.1-0.1
Percentage of Assets ess:EssexPortfolioL.P.-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.1-0.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value2662122771742551452571552681442481492231322301492009682797464854889577243684757275836522558
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10199.70.00.00.010953.30.00.044.577.342.072.344.066.640.169.946.663.837.151.351.147.842.357.433.365.143.256.435.057.040.150.425.056.236.252.425.757.5

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value266212277174255145257155268146251
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.8100.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10199.70.00.00.010953.30.00.044.577.342.372.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.10199.70.00.00.010953.30.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-445176-372-112-21975-7639-98-82-220-83-90-156-83-100-80-674-51-144-27-175-105-294-201-272-44-165-110-65-84-259-128-45-77-75-48
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17028.50.00.00.0-9389.60.00.011.5-28.5-24.0-63.9-24.7-27.0-47.6-25.4-31.2-25.7-260.0-31.9-92.6-17.5-114.7-70.8-203.1-146.1-205.3-34.4-132.1-92.1-56.3-74.0-237.6-122.5-45.4-76.6-74.7-48.1

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-445176-372-112-21975-7639-98-82-221
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.099.8100.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17028.50.00.00.0-9389.60.00.011.5-28.5-24.0-64.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.-17028.50.00.00.0-9389.60.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value379-399132-131-63-244-183-156-91-63-16634-113-105-13384-101436-2973-5710032262109205-2712542-6911023175-426-116
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14519.10.00.00.0-2731.50.00.0-44.9-26.3-18.5-48.210.1-33.8-32.1-40.726.4-32.3168.1-18.547.2-37.165.521.6181.379.5154.9-21.3100.235.2-59.797.4211.872.3-4.725.9-11.66.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value379-399132-131-63-244-183-156-91-65-165
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0102.699.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14519.10.00.00.0-2731.50.00.0-44.9-26.3-19.0-48.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.14519.10.00.00.0-2731.50.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value2662122771742551452571552681442481492231322301492009682797464854889577243684757275836522558
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10199.70.00.00.010953.30.00.044.577.342.072.344.066.640.169.946.663.837.151.351.147.842.357.433.365.143.256.435.057.040.150.425.056.236.252.425.757.5

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value266212277174255145257155268146251
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.8100.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10199.70.00.00.010953.30.00.044.577.342.372.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.10199.70.00.00.010953.30.00.00.00.00.00.0

Net Income Loss

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value3281351059812512486106961098575187204707686854750644458826367529294920422717111612810131710217
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12562.70.00.00.05374.90.00.030.527.831.824.722.455.962.221.323.927.727.615.517.122.916.121.73.216.323.648.719.319.934.314.632.121.314.39.213.711.07.910.013.817.610.52.316.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3281351059812512486106961098575187
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12562.70.00.00.05374.90.00.030.527.831.824.722.455.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.12562.70.00.00.05374.90.00.00.00.00.00.00.00.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value21222222
Percentage of ProfitLoss0.81.42.72.62.02.02.72.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax106.00.00.00.0106.00.00.00.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value315128999211811780100
Percentage of ProfitLoss95.895.394.094.194.794.794.094.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12036.90.00.00.05090.30.00.028.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:CommonEquity us-gaap:GeneralPartner ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.0

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value104334423
Percentage of ProfitLoss3.33.33.33.33.33.33.23.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax419.80.00.00.0178.60.00.01.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:CommonEquity us-gaap:LimitedPartner ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDistributionsInExcessOfNetIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value315128999211811780100901037970178195657281804346604150623337026264517382415913856
Percentage of ProfitLoss95.895.394.094.194.794.794.094.494.194.593.893.495.495.693.493.794.294.492.592.793.793.386.574.888.290.192.589.089.591.087.090.588.485.781.785.671.661.766.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12036.90.00.00.05090.30.00.028.826.230.023.220.953.459.419.922.426.026.014.315.821.515.018.82.414.421.345.017.217.831.212.729.018.812.27.511.77.94.96.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedDistributionsInExcessOfNetIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1366566555655884454334332335334243222333
Percentage of ProfitLoss4.24.76.05.95.35.36.05.65.95.56.26.64.64.46.66.35.85.67.57.36.37.46.325.211.89.97.511.010.59.013.09.511.614.418.314.428.438.333.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax525.80.00.00.0284.70.00.01.71.61.81.51.52.62.71.41.51.61.61.21.21.41.21.40.81.92.33.72.12.13.11.93.02.52.11.72.03.13.03.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value-445176-372-112-21975-7639-98-82-220-83-90-156-83-100-80-674-51-144-27-175-105-294-201-272-44-165-110-65-84-259-128-45-77-75-48
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17028.50.00.00.0-9389.60.00.011.5-28.5-24.0-63.9-24.7-27.0-47.6-25.4-31.2-25.7-260.0-31.9-92.6-17.5-114.7-70.8-203.1-146.1-205.3-34.4-132.1-92.1-56.3-74.0-237.6-122.5-45.4-76.6-74.7-48.1

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-445176-372-112-21975-7639-98-82-221
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.099.8100.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17028.50.00.00.0-9389.60.00.011.5-28.5-24.0-64.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.-17028.50.00.00.0-9389.60.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value379-399132-131-63-244-183-156-91-63-16634-113-105-13384-101436-2973-5710032262109205-2712542-6911023175-426-116
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14519.10.00.00.0-2731.50.00.0-44.9-26.3-18.5-48.210.1-33.8-32.1-40.726.4-32.3168.1-18.547.2-37.165.521.6181.379.5154.9-21.3100.235.2-59.797.4211.872.3-4.725.9-11.66.8

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value379-399132-131-63-244-183-156-91-65-165
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0102.699.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14519.10.00.00.0-2731.50.00.0-44.9-26.3-19.0-48.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax ess:EssexPortfolioL.P.14519.10.00.00.0-2731.50.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value49815239404980002980-467410654444524623052771441667563564161087233327373692353975856031596422263413045974035016214977
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.00.0100.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value498152394049800029800
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0100.00.0100.00.00.00.0100.00.0-0.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value10222532711236068512783101-5443436614377919130927219419353648625076431221341215279174525493177543230469191395323411226550
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1022253271123606851278310147
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-8.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312010-12-312010-09-302009-12-312009-09-30
Value176000564700300000000
Percentage of PaymentsForRepurchaseOfCommonStock100.00.00.00.0100.0100.00.00.0100.00.00.00.00.00.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value176000564700300
Percentage of PaymentsForRepurchaseOfCommonStock100.00.00.00.0100.0100.00.00.0100.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value10222532711236068512783101-5443436614377919130927219419353648625076431221341215279174525493177543230469191395323411226550
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1022253271123606851278310147
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-8.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations ess:EssexPortfolioL.P.0.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:DebtInstrumentInterestRateStatedPercentage

ess:UnsecuredBonds2.650, us-gaap:SeniorNotes, us-gaap:SubsequentEvent



Period End2020-02-29
Value0.0265
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations ess:UnsecuredBonds2.650 us-gaap:SeniorNotes us-gaap:SubsequentEvent0.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value101320132412161110221312111011000100000
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10132013241
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value74747576760
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value7474757676
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value2828191541241511741771396163199100170123
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value2828191541241511741771396163199170123
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:CapitalizedInternalCostsRelatedToDevelopmentAndRedevelopmentProjects



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value944444445544573332232223121110111
Percentage of CapitalizedInternalCostsRelatedToDevelopmentAndRedevelopmentProjects100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:CorporatePropertyManagementExpenses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8888877777777
Percentage of CorporatePropertyManagementExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value888887777777
Percentage of CorporatePropertyManagementExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

ess:DebtInstrumentTermsNumberOfExtensionOptions

us-gaap:LineOfCredit



Period End2020-03-31
Value1.0
Percentage of DebtInstrumentTermsNumberOfExtensionOptions100.0

us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ess:TermLoan, us-gaap:SubsequentEvent



Period End2020-04-30
Value2.0
Percentage of DebtInstrumentTermsNumberOfExtensionOptions0.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:EquityMethodInvestmentOwnershipPercentageAcquired

ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCA



Period End2020-01-31
Value0.45
Percentage of EquityMethodInvestmentOwnershipPercentageAcquired100.0

ess:EquityMethodInvestmentsPreferredReturnsRate



Period End2020-03-312018-11-30
Value0.1130.099
Percentage of EquityMethodInvestmentsPreferredReturnsRate100.0100.0

ess:GainLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2162116161316153210910109987574318446-61003-1-20-3-10-1
Percentage of GainLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21621161613161532109
Percentage of GainLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:GainOnRemeasurementOfCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value2340003131100000286000000122100000021000
Percentage of GainOnRemeasurementOfCoInvestment100.00.00.00.0100.0100.00.00.00.00.00.0100.0100.00.00.00.00.00.00.0100.0100.00.00.00.00.00.00.0100.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value234000311000002
Percentage of GainOnRemeasurementOfCoInvestment100.00.00.00.0100.1100.00.00.00.00.00.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCA



Period End2020-01-31
Value234
Percentage of GainOnRemeasurementOfCoInvestment0.0

us-gaap:ConsolidatedEntities, us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

ess:IncomeEffectOfDilutiveSecurities

srt:Subsidiaries, ess:DownREITUnits



Period End2020-03-312019-03-31
Value196000.00.0
Percentage of IncomeEffectOfDilutiveSecurities100.00.0

ess:IncomeFromContinuingOperationsAvailableToCommonStockholders1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value315128999211811780100901037970179195657277794245594053421145625254316371311858
Percentage of IncomeFromContinuingOperationsAvailableToCommonStockholders1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3261331029512312183103941078273
Percentage of IncomeFromContinuingOperationsAvailableToCommonStockholders1103.5103.5103.5103.5103.5103.5103.4103.4103.4103.4103.4103.4

ess:IncrementalCommonSharesAttributableToDilutiveEffectOfConversionOfUnits



Period End2020-03-312019-03-31
Value94247.00.0
Percentage of IncrementalCommonSharesAttributableToDilutiveEffectOfConversionOfUnits100.00.0

ess:InitialRecognitionInOperatingLeaseLiabilities



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value00079000
Percentage of InitialRecognitionInOperatingLeaseLiabilities0.00.00.0100.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0000790000
Percentage of InitialRecognitionInOperatingLeaseLiabilities0.00.00.00.0100.00.00.00.00.0

us-gaap:InvestmentType, us-gaap:SubsequentEventType

ess:LimitedPartnershipInterestInPartnershipInvestments

ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCA, us-gaap:SubsequentEvent



Period End2020-01-31
Value0.45
Percentage of LimitedPartnershipInterestInPartnershipInvestments100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:MembershipInterestInCPPIB



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.00.0100000000000000090.00.00.540.00.00.00.540.0
Percentage of LimitedPartnershipInterestInPartnershipInvestments0.00.00.00.00.00.00.00.00.00.0

ess:MembershipInterestInLimitedLiabilityCompanyThatOwnsAndIsDevelopingExpo



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.480.0-0.0100000000000000090.00.490.0-0.0100000000000000090.00.52-0.010000000000000009
Percentage of LimitedPartnershipInterestInPartnershipInvestments0.00.00.00.00.00.00.00.00.00.0

ess:MembershipInterestinBEXAEWBEXIIIAndBEXIV



Period End2020-03-31
Value0.5
Percentage of LimitedPartnershipInterestInPartnershipInvestments0.0

ess:MembershipinterestinWescoIIIIIVandV



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.51-0.0100000000000000090.00.00.520.0-0.0100000000000000090.00.53
Percentage of LimitedPartnershipInterestInPartnershipInvestments0.00.00.00.00.00.00.00.00.0

ess:TotalDevelopmentCoInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.50.00.00.00.50.00.00.00.50.0
Percentage of LimitedPartnershipInterestInPartnershipInvestments0.00.00.00.00.00.00.00.00.00.0

us-gaap:RelatedPartyTransactionsByRelatedParty

ess:ManagementAndOtherFeesFromAffiliates

srt:AffiliatedEntity



Period End2020-03-312019-03-31
Value33
Percentage of ManagementAndOtherFeesFromAffiliates100.0100.0

ess:NetOperatingIncomeFromSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value282271262263255252250252249238237238233227227223217216208204193188180173107103102101999589878582767572696564
Percentage of NetOperatingIncomeFromSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value5567513565346691010
Percentage of NetOperatingIncomeFromSegments2.02.02.32.72.35.22.22.62.11.61.92.52.84.24.64.7

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value1201091051041009797979492919289818381
Percentage of NetOperatingIncomeFromSegments42.840.540.239.539.438.638.838.537.938.538.338.838.435.836.536.6

us-gaap:OperatingSegments, ess:SeattleMetro



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value44444343414141404239393840383735
Percentage of NetOperatingIncomeFromSegments15.916.516.716.616.216.616.416.016.816.616.716.017.317.116.616.1

us-gaap:OperatingSegments, ess:SouthernCalifornia



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value111111106108107100106108107103102101104979695
Percentage of NetOperatingIncomeFromSegments39.341.040.841.242.039.742.642.943.243.243.242.744.743.042.442.6

us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:NumberOfCommunitiesHeldByEquityMethodInvestment

srt:ApartmentBuilding, ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCA



Period End2020-01-31
Value6.0
Percentage of NumberOfCommunitiesHeldByEquityMethodInvestment100.0

us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:NumberOfUnitsHeldByEquityMethodInvestment

srt:ApartmentBuilding, ess:CanadianPensionPlanInvestmentBoardCPPIBorCPPSanFranciscoCA



Period End2020-01-31
Value2020.0
Percentage of NumberOfUnitsHeldByEquityMethodInvestment100.0

dei:LegalEntity

ess:PartnersCapitalAccountStockAndUnitBasedCompensationCosts

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value141324142
Percentage of PartnersCapitalAccountStockAndUnitBasedCompensationCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value14132313
Percentage of PartnersCapitalAccountStockAndUnitBasedCompensationCosts95.391.985.190.688.592.285.692.2

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value79000.0356000.0270000.0329000.0299000.0336000.0251000.0336000.0
Percentage of PartnersCapitalAccountStockAndUnitBasedCompensationCosts4.78.114.99.411.57.814.47.8

dei:LegalEntity

ess:PartnersCapitalAccountStockAndUnitBasedCompensationPlans

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8027233001
Percentage of PartnersCapitalAccountStockAndUnitBasedCompensationPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value802723300
Percentage of PartnersCapitalAccountStockAndUnitBasedCompensationPlans100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:PartnersCapitalAccountUnitsStockAndUnitBasedCompensationPlan

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value89000.07000.0126000.011000.051000.024000.05000.05000.0
Percentage of PartnersCapitalAccountUnitsStockAndUnitBasedCompensationPlan100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:PartnersCapitalAccountUnitsStockandunitbasedcompensationcosts

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2000.07000.00.00.03000.06000.00.00.0
Percentage of PartnersCapitalAccountUnitsStockandunitbasedcompensationcosts100.0100.00.00.0100.0100.00.00.0

ess:PaymentsForProceedsFromSalesAndMaturitiesOfMarketableSecurities



Period End2020-03-312019-03-31
Value0-16
Percentage of PaymentsForProceedsFromSalesAndMaturitiesOfMarketableSecurities100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value0-16
Percentage of PaymentsForProceedsFromSalesAndMaturitiesOfMarketableSecurities100.0100.0

ess:ReclassificationFromToRedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-4-1201-1001000000-10210
Percentage of ReclassificationFromToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-4-1201-100100
Percentage of ReclassificationFromToRedeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:RedemptionsOfNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value12201121000252100110002-70200301-8200
Percentage of RedemptionsOfNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1220112100
Percentage of RedemptionsOfNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0600100
Percentage of RedemptionsOfNoncontrollingInterest17.327.418000.014.011.94.811.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1160110000
Percentage of RedemptionsOfNoncontrollingInterest76.672.4-21100.085.985.178.189.094.7

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value84000.038000.032000.01000.0365000.0202000.00.03000.0
Percentage of RedemptionsOfNoncontrollingInterest6.10.23200.00.13.017.20.05.3

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1160110000022200000000100100200-1000
Percentage of RedemptionsOfNoncontrollingInterest76.672.4-21100.085.985.178.189.094.7100.088.985.178.0188.2114.479.976.10.087.291.682.5-7.992.881.10.070.788.879.40.021.00.0-0.0-0.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0600100002000000000000000001-6200
Percentage of RedemptionsOfNoncontrollingInterest23.427.621200.014.114.921.911.05.30.011.114.922.0-88.2-14.420.123.90.012.88.417.5-7.17.218.9100.029.311.220.6100.079.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:RedemptionsOfNoncontrollingInterestShares

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7000.03000.01000.00.09000.04000.00.01000.0
Percentage of RedemptionsOfNoncontrollingInterestShares100.0100.0100.00.0100.0100.00.0100.0

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8000.03000.01000.00.09000.05000.00.00.0
Percentage of RedemptionsOfNoncontrollingInterestShares114.3100.0100.00.0100.0125.00.00.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-31
Value7000.03000.01000.018000.0-9000.06000.00.01000.00.00.01000.01000.00.0
Percentage of RedemptionsOfNoncontrollingInterestShares100.0100.0100.00.0-100.0150.00.0100.00.00.00.00.00.0

ess:RedevelopmentExpenditures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value18152416141818201519201812201919249124221911715136914116814981810411524255
Percentage of RedevelopmentExpenditures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1815241614181820151920
Percentage of RedevelopmentExpenditures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionsByRelatedParty

ess:RelatedPartyTransactionRevenuesfromDevelopmentandRedevelopmentFees

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Period End2020-03-312019-03-31
Value01
Percentage of RelatedPartyTransactionRevenuesfromDevelopmentandRedevelopmentFees100.0100.0

ess:RevenueGeneratingCapitalExpenditures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value173227241726231614242014101918165141881658883310032102310000000
Percentage of RevenueGeneratingCapitalExpenditures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1732272417262316142423
Percentage of RevenueGeneratingCapitalExpenditures100.0100.0100.0100.0100.0100.0100.0100.0100.098.1111.0

ess:StockOptionAndRestrictedStockPlans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value8027233001221651665432154-3811310
Percentage of StockOptionAndRestrictedStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value8027233001221651665432154-3811310
Percentage of StockOptionAndRestrictedStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

ess:StockOptionAndRestrictedStockPlansShares

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value89000.07000.0126000.011000.051000.024000.05000.05000.07000.064000.045000.096000.013000.05000.042000.016000.0
Percentage of StockOptionAndRestrictedStockPlansShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:TransferFromRealEstateUnderDevelopmentToCoInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-03-31
Value00000000000121322022123146302700120
Percentage of TransferFromRealEstateUnderDevelopmentToCoInvestments100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value824000.0565000.0-134000.0-73000.0313000.0213000.00.0275000.0365000.0953000.0782000.0
Percentage of TransferFromRealEstateUnderDevelopmentToCoInvestments100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

ess:TransferFromRealEstateUnderDevelopmentToRentalProperties



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value13151400019800000-2-2010707138162-616613000001407846041
Percentage of TransferFromRealEstateUnderDevelopmentToRentalProperties100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value131514000198000
Percentage of TransferFromRealEstateUnderDevelopmentToRentalProperties100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

srt:MortgageLoansOnRealEstateInterestRate

ess:SecuredNoteReceivable9.00InterestRateDueMay2021



Period End2020-03-31
Value0.09
Percentage of MortgageLoansOnRealEstateInterestRate100.0

ess:SecuredNoteReceivable9.90InterestRateDueNovember2019



Period End2020-03-31
Value0.099
Percentage of MortgageLoansOnRealEstateInterestRate110.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value141324142612161114221470000000000000000
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value14132313251115010301006-1000000000000000
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue95.391.985.190.688.592.285.692.289.189.270.177.388.686.453.464.860.181.831.362.744.7-0.894.4245.3-22.8-20.0-37.5-218.9-80.3-349.640.4-44.5-41.9-1050.70.027.4-63.3-7.2-14.9

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value000000000000000000100400000000000000000
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue4.78.114.99.411.57.814.47.810.910.829.922.711.413.646.635.239.918.268.737.355.3100.85.6-145.3122.8120.0137.5318.9180.3449.659.6144.5141.91150.7100.072.6163.3107.2114.9

us-gaap:AmortizationOfDebtDiscountPremium



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312011-09-302010-12-312010-09-30
Value22110000000-1-3-3-3-3-3-4-3-4-6-9-4-32000
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value22110000000
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

ess:ConvertibleLimitedPartnershipUnits



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value222222222222222222222222222222
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeStockOption



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value116380.00.00.0106029.0150852.0185181.0364068.00.08240.0225895.040900.087954.077200.024500.024500.00.08343.036956.0164442.038825.0260513.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount5.10.00.04.66.68.116.00.00.410.01.84.03.51.11.10.00.31.77.21.812.1

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities, dei:LegalEntity

us-gaap:EmployeeStockOption, ess:EssexPortfolioL.P.



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value116380.00.00.0106029.0150852.0185181.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount5.10.00.04.66.68.1

us-gaap:BusinessCombinationAcquisitionRelatedCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0000000000000000020027326164000
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value87000.099000.013000.024000.032000.038000.031000.068000.057000.0415000.0324000.0274000.0
Percentage of BusinessCombinationAcquisitionRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value20136-69-27-2
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value20136-69-27-2
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2.07751.951.951.951.861.861.86
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:CommonStockDividendsPerShareDeclared

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2.07751.951.951.951.951.861.861.861.861.751.751.751.75
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfOtherPropertyOperatingExpense



Period End2020-03-312019-03-31
Value6458
Percentage of CostOfOtherPropertyOperatingExpense100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value6458
Percentage of CostOfOtherPropertyOperatingExpense100.0100.0

us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

ess:LineOfCreditWorkingCapital, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR



Period End2020-03-31
Value0.00825
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

us-gaap:LongtermDebtType, us-gaap:SubsequentEventType, us-gaap:VariableRate

ess:TermLoan, us-gaap:SubsequentEvent, us-gaap:LondonInterbankOfferedRateLIBOR



Period End2020-04-30
Value0.012
Percentage of DebtInstrumentBasisSpreadOnVariableRate10.0

us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR



Period End2020-03-31
Value0.00825
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0

us-gaap:Depreciation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1311221201191201201201191191171171171151111101091091161161131061061029750494848474543414039383736353131
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value131122120119120120120119119117117117
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312011-06-302010-06-30
Value13112212011912012012011911911711711711511111010910911611310610210150-6-4
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value131122120119120120120119119117117
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainOnDerivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value122122222222223235000
Percentage of DerivativeGainOnDerivative100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value122122222222
Percentage of DerivativeGainOnDerivative100.0100.0100.0100.0102.2100.099.3100.098.7100.0100.0100.0

us-gaap:DividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value13512812812812812212212212211511511511410410410410695959394-51283834746464646-281199-790-36-36-35-33-32-31
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDistributionsInExcessOfNetIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value135128128128128122122122122115115115114104104104106959593948483834746464646-281199-40-38-36-36-35-33-32-31
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-16.4100.0100.0100.0100.0100.0100.0100.0100.0100.051.00.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDividendsOrDistributions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312011-06-302010-06-30
Value1934252017191920402920151215211491713865200-30-38-2000
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0100.00.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1934252017191920402920
Percentage of EquityMethodInvestmentDividendsOrDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCostOfSales

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value2529292728262726273127252524242425232323222218181189992012-10-13-9-7
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCostOfSales100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value5157545355585754535648465048474449444238403732301613151618132118211410
Percentage of EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value-111756833774771418991723432221451401360-196-10-1-6-3
Percentage of EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationRevenue

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value7787848183858481808876727572726975686562636051482721242627333428342418
Percentage of EquityMethodInvestmentSummarizedFinancialInformationRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss



Period End2020-03-312019-12-312019-03-312018-12-31
Value-814-5
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-03-312018-12-31
Value-814-5
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-41002-51
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss52.3102.20.00.049.498.60.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-676000.0-32000.0197000.0334000.045000.0-138000.0-59000.0
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss7.8-2.20.00.01.02.50.0

us-gaap:IncomeStatementLocation

ess:InterestAndOtherIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value81004-510
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss-100.097.90.00.099.8100.30.00.0

us-gaap:GainLossOnSaleOfInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-13000.0534000.0239000.0556000.0-58000.068000.0120000.0-131000.0680000.0259000.032000.0
Percentage of GainLossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-13000.0534000.0239000.0556000.0-58000.068000.0120000.0-131000.0680000.0259000.032000.0
Percentage of GainLossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainsLossesOnExtinguishmentOfDebt



Period End2020-03-312019-12-312019-09-302019-09-302019-06-302019-03-312019-01-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302009-12-312009-09-302009-06-30
Value0-3550110000-100000-4001221000-3-1010-2-1-1000000-100
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.0100.0100.00.00.00.00.0100.00.0100.0100.00.00.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0-35010000
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.099.5100.0100.00.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:IncomeLossAttributableToParent

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value21572116162416153245191010991415574418451034074323320-1
Percentage of IncomeLossAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

ess:TotalCoInvestment, srt:AffiliatedEntity



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value221100000
Percentage of IncomeLossAttributableToParent9.99.210.610.44.22.01.22.54.9

us-gaap:IncomeLossFromEquityMethodInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value2157211616241615324519101099141557441845103407432332000-10000000
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value215721161624161532451910
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value32-3451-4153-5552-4952-6554-4542-4839-2535-4631-1621-2034-515-1921-108-1321-914-1413-49-1416
Percentage of IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value32-3451-4153-5552-4952-6453
Percentage of IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.097.599.8

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value100000000000000000010000000001000000000
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10000000000
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0111111111100
Percentage of IncreaseDecreaseInOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value01111111111
Percentage of IncreaseDecreaseInOtherReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0-9-334-2-22304-142-440-2-410-3-6-60-2-18200-1501202-11-10
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-9-334-2-22301
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.016.024.1

us-gaap:IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value00000-30401-10-8979-82-595211-4-45-2356-2-8351-19-7112022-2-172
Percentage of IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00000-30401-2
Percentage of IncreaseDecreaseInRestrictedCashAndInvestmentsForOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0117.4157.3

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-03-31
Value57337.081081.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value57337.081081.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0

us-gaap:InterestAndOtherIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-517881218656556749547343222221523524226757
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-51788121865655
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidCapitalized



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value45665544433333333334446833443322116
Percentage of InterestPaidCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value45665544433
Percentage of InterestPaidCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value52495053415745604063425848634744484549365037481726262626232722222223231924212120192220
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5249505341574560406342
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeAmortizationOfDiscount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2115554444333333333322222111111111
Percentage of InvestmentIncomeAmortizationOfDiscount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value211555444433
Percentage of InvestmentIncomeAmortizationOfDiscount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Ownership

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest

ess:OperatingPartnership



Period End2020-03-31
Value0.966
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest100.0

us-gaap:MarketableSecuritiesRealizedGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312012-12-312012-09-302012-06-302011-12-312011-09-30
Value000000000000100000
Percentage of MarketableSecuritiesRealizedGainLoss100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0

us-gaap:MinorityInterestChangeInRedemptionValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value41-20-1100-100000010-101-1-1
Percentage of MinorityInterestChangeInRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value41-20-1100-1
Percentage of MinorityInterestChangeInRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0000100
Percentage of MinorityInterestChangeInRedemptionValue0.90.0-0.013.9-71.45.1-2.9

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value41-20-3000
Percentage of MinorityInterestChangeInRedemptionValue99.597.2102.885.0171.381.694.6288.0

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-18000.046000.061000.04000.0-2000.0144000.0-34000.0-203000.0
Percentage of MinorityInterestChangeInRedemptionValue-0.42.8-2.71.20.113.28.3-188.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value41-20-3000-100000010-101-1-1
Percentage of MinorityInterestChangeInRedemptionValue99.597.2102.885.0171.381.694.6288.0100.293.163.6141.769.1106.699.572.1112.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-31
Value00001000000000000000
Percentage of MinorityInterestChangeInRedemptionValue0.52.8-2.815.0-71.318.45.4-188.0-0.26.936.4-41.730.9-6.60.527.9-12.0-0.00.0-0.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value776676696569556855483-295334453-2922-5-3-3-3-4-5-5-7
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value332222242
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders39.440.933.935.237.238.138.253.332.5

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value33222224
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders39.440.933.935.237.238.138.253.3

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value77667669656955685548345334453-2922-5-3-3-3-4-5-5-7
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-14.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromBusinessCombination



Period End2020-03-312019-09-302019-06-30
Value1065
Percentage of NoncontrollingInterestIncreaseFromBusinessCombination100.00.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-09-302019-06-30
Value1065
Percentage of NoncontrollingInterestIncreaseFromBusinessCombination100.00.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-09-302019-06-30
Value1065
Percentage of NoncontrollingInterestIncreaseFromBusinessCombination100.00.0100.0

us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest



Period End2020-03-312019-09-302019-06-30
Value1065
Percentage of NoncontrollingInterestIncreaseFromBusinessCombination100.00.0100.0

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us-gaap:NumberOfBusinessesAcquired

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Period End2020-01-31
Value6.0
Percentage of NumberOfBusinessesAcquired100.0

us-gaap:OperatingLeaseLeaseIncome



Period End2020-03-312019-03-31
Value389353
Percentage of OperatingLeaseLeaseIncome100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value389353
Percentage of OperatingLeaseLeaseIncome100.0100.0

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Period End2020-03-312019-03-31
Value65
Percentage of OperatingLeaseLeaseIncome1.61.5

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Period End2020-03-312019-03-31
Value164136
Percentage of OperatingLeaseLeaseIncome42.138.6

us-gaap:OperatingSegments, ess:RentalAndOtherPropertyRevenues, ess:SeattleMetro



Period End2020-03-312019-03-31
Value6360
Percentage of OperatingLeaseLeaseIncome16.417.1

us-gaap:OperatingSegments, ess:RentalAndOtherPropertyRevenues, ess:SouthernCalifornia



Period End2020-03-312019-03-31
Value155151
Percentage of OperatingLeaseLeaseIncome39.942.8

us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ProductOrService

ess:RealEstatePropertyAcquired, ess:RentalAndOtherPropertyRevenues



Period End2020-03-312019-03-31
Value210
Percentage of OperatingLeaseLeaseIncome5.60.3

ess:RealEstatePropertyDevelopment, ess:RentalAndOtherPropertyRevenues



Period End2020-03-312019-03-31
Value41
Percentage of OperatingLeaseLeaseIncome1.00.3

ess:RealEstatePropertyNonResidentialOtherNet, ess:RentalAndOtherPropertyRevenues



Period End2020-03-312019-03-31
Value1110
Percentage of OperatingLeaseLeaseIncome3.13.1

ess:RealEstatePropertyRedevelopment, ess:RentalAndOtherPropertyRevenues



Period End2020-03-312019-03-31
Value55
Percentage of OperatingLeaseLeaseIncome1.41.5

ess:RealEstatePropertySameProperty, ess:RentalAndOtherPropertyRevenues



Period End2020-03-312019-03-31
Value346335
Percentage of OperatingLeaseLeaseIncome88.994.8

us-gaap:ProductOrService

ess:OtherPropertyLeasingRevenue



Period End2020-03-312019-03-31
Value66
Percentage of OperatingLeaseLeaseIncome1.61.7

ess:Rental



Period End2020-03-312019-03-31
Value383347
Percentage of OperatingLeaseLeaseIncome98.498.3

ess:RentalAndOtherPropertyRevenues



Period End2020-03-312019-03-31
Value389353
Percentage of OperatingLeaseLeaseIncome100.0100.0

us-gaap:OperatingLeasePayments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value111110000
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.00.00.00.00.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value111110000
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.00.00.00.00.0

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us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

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Period End2020-03-312019-09-30
Value-71
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss, ess:EssexPortfolioL.P.



Period End2020-03-312019-09-30
Value-305000.0-25000.0
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax4.1-1.3

us-gaap:AccumulatedOtherComprehensiveIncome, ess:EssexPortfolioL.P.



Period End2020-03-312019-09-30
Value-71
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax104.198.7

us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-30
Value-71
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax96.696.6

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0000000100
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax4.0-1.20.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-71-20457635
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.695.30.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax



Period End2020-03-312019-03-31
Value-8-1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value-8-1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:AccumulatedOtherComprehensiveIncome, ess:EssexPortfolioL.P.



Period End2020-03-312019-03-31
Value-8-1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-03-31
Value-8-1
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax96.696.6

us-gaap:NoncontrollingInterest



Period End2020-03-312019-03-31
Value-296000.0-67000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax3.43.4

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us-gaap:OtherComprehensiveIncomeLossNetOfTax

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Period End2020-03-312019-09-30
Value-80
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss, ess:EssexPortfolioL.P.



Period End2020-03-312019-09-30
Value-305000.0-25000.0
Percentage of OtherComprehensiveIncomeLossNetOfTax3.5208.3

us-gaap:AccumulatedOtherComprehensiveIncome, ess:EssexPortfolioL.P.



Period End2020-03-312019-09-30
Value-90
Percentage of OtherComprehensiveIncomeLossNetOfTax103.5308.3

us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-09-30
Value-80
Percentage of OtherComprehensiveIncomeLossNetOfTax96.6100.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value000000-210-1
Percentage of OtherComprehensiveIncomeLossNetOfTax3.3200.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-80-4-1233312
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0300.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value00000000011000-10021-4136-1-2-2000-35-101-20102
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-305000.078000.0-25000.0105000.0123000.0-31000.012000.0-22000.0-77000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:AccumulatedOtherComprehensiveIncome, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-305000.078000.0-25000.0105000.0123000.0-31000.012000.0-22000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value00000000011000-10021-3135-1-1-2000-25-101-20102
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax96.496.296.097.196.796.891.795.596.196.796.896.796.696.796.7100.096.896.896.896.896.898.795.697.094.394.694.694.694.293.393.993.993.994.093.693.293.352.992.1

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-11000.03000.0-1000.03000.04000.0-1000.01000.0-1000.0-3000.044000.041000.017000.06000.022000.0-59000.00.010000.078000.050000.0-128000.061000.050000.0274000.0-46000.0-116000.0-146000.038000.032000.0-8000.0-209000.0327000.0-73000.021000.0103000.0-160000.065000.077000.0-33000.0194000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax3.63.84.02.93.33.28.34.53.93.33.23.33.43.33.3-0.03.23.23.23.23.21.34.43.05.75.45.45.45.86.76.16.16.16.06.46.86.747.17.9

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherDepreciationAndAmortization

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-06-302011-03-31
Value28313028293132313133272827242525282726242524211710789111212-8-13-9-8
Percentage of OtherDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:PartnersCapitalAccountDistributions

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value140133133132132126127127127
Percentage of PartnersCapitalAccountDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value135128128128128122122122
Percentage of PartnersCapitalAccountDistributions96.696.696.696.696.696.696.796.7

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value44444444
Percentage of PartnersCapitalAccountDistributions3.43.43.43.43.43.43.33.3

us-gaap:PaymentOfFinancingAndStockIssuanceCosts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value5130500030021203130040079303003201300210010
Percentage of PaymentOfFinancingAndStockIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value51305000300
Percentage of PaymentOfFinancingAndStockIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PaymentsForRepurchaseOfRedeemableNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value0000000004000
Percentage of PaymentsForRepurchaseOfRedeemableNoncontrollingInterest0.00.00.00.0100.0100.00.0100.00.0100.00.00.00.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00000000040
Percentage of PaymentsForRepurchaseOfRedeemableNoncontrollingInterest0.00.00.00.0100.0100.00.0100.00.0100.00.0

us-gaap:PaymentsOfDistributionsToAffiliates



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value7766667956685568454734533445333533345576555
Percentage of PaymentsOfDistributionsToAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21211122221
Percentage of PaymentsOfDistributionsToAffiliates27.017.031.928.628.127.530.524.038.335.532.6

us-gaap:PaymentsOfOrdinaryDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value12812812812812212212212211511511511410410410410695959493838382-196464646414040383635353432313130302929
Percentage of PaymentsOfOrdinaryDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value134135132133127127127129119119119
Percentage of PaymentsOfOrdinaryDividends104.2105.0103.4103.8104.1104.1104.0105.7103.2103.4103.5

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value50003000000000
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-06-302015-03-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
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dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1032318811413232
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4584045244722266
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Period End2020-03-312019-03-31
Value2539
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Period End2020-03-312019-03-31
Value2539
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
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Period End2020-01-31
Value85
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Period End2020-01-31
Value16
Percentage of ProceedsFromCollectionOfNotesReceivable19.7

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Period End2020-01-31
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Percentage of ProceedsFromCollectionOfNotesReceivable19.7

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value720343161021233624944
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00011000000
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value007200000080
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Period End2020-02-29
Value500
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10384545094085672881518125641797
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value9816600200029550000000019213500052610700000010120
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value9816600200029550
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value09073316939924324
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
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Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1412726300122
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-31
Value-50000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses100.0

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Period End2020-03-31
Value43000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses-86.0

ess:NotesReceivableMezzanineAndBridgeLoans



Period End2020-03-31
Value124000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses-248.0

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Period End2020-03-31
Value81000.0
Percentage of ProvisionForLoanLeaseAndOtherLosses-162.0

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Period End2020-03-31
Value0.0
Percentage of ProvisionForLoanLeaseAndOtherLosses-0.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
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Percentage of RealEstateTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value434039363939383537383734
Percentage of RealEstateTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-09-30
Value11
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Period End2020-03-312019-09-30
Value11
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Period End2020-03-312019-09-30
Value11
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Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0000000001
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Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value1111111223
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value7436194062915672881817943524194238353149
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
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Value00077000
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0000770000
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value007200000
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Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
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Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
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Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
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Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
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us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value776000.00.00.0234000.00.00.017000.0
Percentage of TreasuryStockSharesRetired100.00.00.0100.00.00.00.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

ess:ConvertibleLimitedPartnershipUnits



Period End2020-03-312019-09-302019-03-312018-09-30
Value11342
Percentage of UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic100.0100.0100.0100.0

ess:AssetsRelatedToVariableInterestEntitiesNetIntercompanyEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value110010001000100087684983983584583784211001100989954901904241239236235200234232233194201203202201202201200215215214217
Percentage of AssetsRelatedToVariableInterestEntitiesNetIntercompanyEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:CompanyShareOfEquity

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value9971335141313241307130012671291129011551088104510351161112211031069103610361044105710361043964716677674571
Percentage of CompanyShareOfEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:DistributionsInExcessOfAccumulatedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value708887887857822812808766743833821785741805896856824797782731684650608575498474461484464444448425422408386359313
Percentage of DistributionsInExcessOfAccumulatedEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:FixedRateDebtCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value550052005200510051005000500051005100490050005100480044002300213017701560
Percentage of FixedRateDebtCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:FixedRateDebtFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value560054005500530052005000500051005100500052005100480046002330218801580
Percentage of FixedRateDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value9971335141313241307130012671291129011191088104510351161
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:MembershipInterestInCPPIB



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0345469473478482487492496500502461463422
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures0.025.933.235.836.637.138.438.138.544.746.244.244.836.3

ess:MembershipInterestInLimitedLiabilityCompanyThatOwnsAndIsDevelopingExpo



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2120201513344647505140414243
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures2.11.51.41.11.02.63.63.73.94.63.73.94.13.8

ess:MembershipInterestinBEXAEWBEXIIIAndBEXIV



Period End2020-03-312019-12-312019-09-302018-12-31
Value156160161121
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures15.712.011.49.4

ess:MembershipinterestinWescoIIIIIVandV



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
Value209216212187191194187211214214225180
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures21.016.215.114.214.615.014.816.416.619.220.715.6

ess:TotalDevelopmentCoInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value158146137120109947776757385126123157
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures15.911.09.79.18.47.26.15.95.86.67.912.111.913.5

ess:TotalOperatingCoInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value387743863793802833840872896780777693699781
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures38.955.761.160.061.464.166.367.569.469.771.466.467.567.3

ess:TotalPreferredInterestInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value451444412409395372350342319265225225213222
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures45.333.329.231.030.228.727.626.524.723.720.721.620.619.1

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RelatedPartyTransactionsByRelatedParty

ess:TotalPreferredInterestInvestments, us-gaap:InvestmentsInMajorityOwnedSubsidiaries



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value757370686751363615
Percentage of InvestmentsInDistributionsInExcessOfInvestmentsInAndAdvanceToAffiliatesSubsidiariesAssociatesAndJointVentures7.65.55.05.25.14.02.92.81.4

ess:LiabilitiesRelatedToVariableInterestEntitiesNetOfIntercompanyEliminations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value348364372369268261264262266265278349351288267229231206208207209196194221218178185183181178199174172173172170168
Percentage of LiabilitiesRelatedToVariableInterestEntitiesNetOfIntercompanyEliminations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:MarketableSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-53222-23112
Percentage of MarketableSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:MarketableSecuritiesAfterAllowanceForCreditLoss



Period End2020-03-312019-12-31
Value148144
Percentage of MarketableSecuritiesAfterAllowanceForCreditLoss100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-31
Value148144
Percentage of MarketableSecuritiesAfterAllowanceForCreditLoss100.0100.0

ess:MarketableSecuritiesAllowanceForCreditLoss



Period End2020-03-312019-12-31
Value130
Percentage of MarketableSecuritiesAllowanceForCreditLoss100.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-31
Value130
Percentage of MarketableSecuritiesAllowanceForCreditLoss99.70.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:MortgageBackedSecuritiesOther



Period End2020-03-312019-12-31
Value130
Percentage of MarketableSecuritiesAllowanceForCreditLoss100.00.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, ess:CumulativeEffectPeriodOfAdoption

us-gaap:MortgageBackedSecuritiesOther, ess:CumulativeEffectPeriodOfAdoptionAdjustment



Period End2020-01-01
Value13
Percentage of MarketableSecuritiesAllowanceForCreditLoss0.0

ess:MarketableSecuritiesAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value153140214213208211207205195187
Percentage of MarketableSecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:NumberOfApartmentCommunitiesOwned



Period End2020-03-312017-12-312014-12-312013-12-312012-12-312011-12-312011-09-30
Value250.0247.0239.0164.0163.0159.0155.0
Percentage of NumberOfApartmentCommunitiesOwned100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:ProductOrService

ess:RealEstatePropertyNonResidentialOtherNet, ess:RentalAndOtherPropertyRevenues



Period End2020-03-31
Value3.0
Percentage of NumberOfApartmentCommunitiesOwned1.2

ess:NumberOfCommunitiesWithinDownreitPartnerships



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value9.09.09.09.08.0
Percentage of NumberOfCommunitiesWithinDownreitPartnerships100.0100.0100.0100.0100.0

ess:NumberOfDownreitLimitedPartnershipsConsolidatedByCompany



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value17.017.017.017.016.0
Percentage of NumberOfDownreitLimitedPartnershipsConsolidatedByCompany100.0100.0100.0100.0100.0

dei:LegalEntity

ess:OperatingPartnershipUnitsOutstanding

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value222222222
Percentage of OperatingPartnershipUnitsOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:PreferredEquityInvestmentCommitmentToFund



Period End2020-03-31
Value91
Percentage of PreferredEquityInvestmentCommitmentToFund100.0

ess:RealEstateDevelopmentInProcess



Period End2020-03-312019-12-31
Value435546
Percentage of RealEstateDevelopmentInProcess100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-31
Value435546
Percentage of RealEstateDevelopmentInProcess100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:TotalCoInvestment



Period End2020-03-312019-12-31
Value42874733
Percentage of RealEstateDevelopmentInProcess983.6866.9

dei:LegalEntity

ess:RedemptionValueOfOperatingPartnershipUnitsOutstanding

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value505692750671665565560543547
Percentage of RedemptionValueOfOperatingPartnershipUnitsOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:TotalRealEstateNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value12861122301235512204120471191112012120461217512091120911206812103118181173711771117901168611733117761157511214113181098263644916480047634739459042574100383638203705362635833514327831093009
Percentage of TotalRealEstateNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value128611223012355122041204711911120121204612100
Percentage of TotalRealEstateNet100.0100.0100.0100.0100.0100.0100.0100.0100.1

ess:UnsecuredDebtAndLineOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value649548186048584157353799563356915718368056155663560233715584561853523100531753695436286352262815154616291425141412141253615
Percentage of UnsecuredDebtAndLineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:VariableInterestEntityNumberOfConsolidatedCoinvestmentsDeterminedToBeVariableInterestEntities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value6.06.07.07.08.0
Percentage of VariableInterestEntityNumberOfConsolidatedCoinvestmentsDeterminedToBeVariableInterestEntities100.0100.0100.0100.0100.0

ess:VariableRateDebtCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value955660839736619619612615612792499525660737692593695
Percentage of VariableRateDebtCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:VariableRateDebtFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value949655833731615615615618615793502527656719671572672
Percentage of VariableRateDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1931581931401801271851321791272221391841381851451701311771461621421671328367837686647662624863495444574138
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value193158193140180127185132127
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value69597121713170317028709371337131712771297111713170357029702470177010700369806941684866516569641425052345233023312329220421162017187718441776168715551515137913241275
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1111444444
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value224798
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis230.6231.0469.0710.4217.3217.8

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:CorporateDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0111434444
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value224788
Percentage of AvailableForSaleSecuritiesDebtSecurities303.9219.7463.1689.0216.4224.9

us-gaap:ConstructionPayableCurrentAndNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value5048535960596358485159473535343836402626283038347867854336101110991410
Percentage of ConstructionPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value504853596059635851
Percentage of ConstructionPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3344566789
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption

us-gaap:AccountingStandardsUpdate201613



Period End2020-01-01
Value-190000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0

us-gaap:AdjustmentsForNewAccountingPronouncements, dei:LegalEntity

us-gaap:AccountingStandardsUpdate201613, ess:EssexPortfolioL.P.



Period End2020-01-01
Value-190000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0

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us-gaap:AccountingStandardsUpdate201613, ess:CommonEquity, ess:EssexPortfolioL.P.



Period End2020-01-01
Value-190000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0

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Period End2020-01-01
Value0.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption-0.0

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us-gaap:AccountingStandardsUpdate201613, us-gaap:AccumulatedDistributionsInExcessOfNetIncome



Period End2020-01-01
Value200000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption-105.3

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Period End2020-01-01
Value0.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption-0.0

us-gaap:AccountingStandardsUpdate201613, us-gaap:NoncontrollingInterest



Period End2020-01-01
Value0.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption-0.0

us-gaap:StatementEquityComponents

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Period End2020-01-01
Value-190000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption100.0

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us-gaap:DebtInstrumentFaceAmount

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Period End2020-02-29
Value500
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

ess:TermLoan, us-gaap:SubsequentEvent



Period End2020-04-30
Value200
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

ess:MortgageNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value-5-5-6-12-10-14-21-25-29-3337414650
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1412149977665542014
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet-282.0-206.8-219.4-74.8-84.9-47.7-33.0-27.0-22.6-15.713.411.55.7-0.20.0

us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-248000.060000.010000.031000.05000.0-145000.0
Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax100.0100.0100.0100.0100.0100.0

us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value16000.013000.0-15000.0-11000.0-25000.0-31000.0
Percentage of DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax-6.521.7-150.0-35.5-500.021.4

us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss

us-gaap:CorporateDebtSecurities



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss0.0

us-gaap:USTreasurySecurities



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss0.0

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us-gaap:DerivativeAssetFairValueGrossLiability

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Period End2020-03-312019-12-31
Value30
Percentage of DerivativeAssetFairValueGrossLiability100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeAsset

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value01014588753344
Percentage of DerivativeFairValueOfDerivativeAsset0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

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Period End2020-03-312019-12-312019-09-302019-06-30
Value255255255255
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

us-gaap:DividendsPayableCurrentAndNoncurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value142135135134134128128129129121121121120110110110111100999998888786150505050454443423939373636353433
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value142135135134134128128129121
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:DueFromAffiliates

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Period End2020-03-312019-12-31
Value74
Percentage of DueFromAffiliates100.0100.0

us-gaap:DueFromRelatedParties



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value790144101011101094165111011
Percentage of DueFromRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value790144101011101041
Percentage of DueFromRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationAssets

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-31
Value444548734890450044124472436841983955383337823546353539283550344234343457339833863607353431953094212520141758183417941913170315921722
Percentage of EquityMethodInvestmentSummarizedFinancialInformationAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationEquity

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-31
Value1741231324262207213721752177218521412082211920611997223619541872186118651865189919981765182617621286122199310239531000805632774
Percentage of EquityMethodInvestmentSummarizedFinancialInformationEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilities

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-31
Value252224422316217021602190208919481744170515971416146116171506147314751499142313911450167712851248756667659663785820838904900
Percentage of EquityMethodInvestmentSummarizedFinancialInformationLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-31
Value444548734890450044124472436841983955383337823546353539283550344234343457339833863607353431953094212520141758183417941913170315921722
Percentage of EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquitySecuritiesFvNi



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value334666
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value403738404438434237
Percentage of EquitySecuritiesFvNi1276.41051.9787.5597.3650.3568.10.00.00.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value293028282131313127
Percentage of EquitySecuritiesFvNi906.5837.0580.8414.9310.7468.10.00.00.0

us-gaap:FinancialInstrument

us-gaap:EquitySecuritiesFvNiCost

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value453437384139393934
Percentage of EquitySecuritiesFvNiCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value292927272131313127
Percentage of EquitySecuritiesFvNiCost65.484.775.171.850.280.480.380.381.3

us-gaap:FinancingReceivableAllowanceForCreditLosses



Period End2020-03-312019-12-31
Value100000.00.0
Percentage of FinancingReceivableAllowanceForCreditLosses100.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-31
Value100000.00.0
Percentage of FinancingReceivableAllowanceForCreditLosses100.00.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

ess:NotesReceivableMezzanineAndBridgeLoans



Period End2020-03-312019-12-31
Value66000.00.0
Percentage of FinancingReceivableAllowanceForCreditLosses66.00.0

ess:NotesReceivableMezzanineLoans



Period End2020-03-312019-12-31
Value66000.00.0
Percentage of FinancingReceivableAllowanceForCreditLosses66.00.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, ess:CumulativeEffectPeriodOfAdoption

ess:NotesReceivableBridgeLoan, ess:CumulativeEffectPeriodOfAdoptionAdjustment



Period End2020-01-01
Value43000.0
Percentage of FinancingReceivableAllowanceForCreditLosses0.0

ess:NotesReceivableMezzanineAndBridgeLoans, ess:CumulativeEffectPeriodOfAdoptionAdjustment



Period End2020-01-01
Value190000.0
Percentage of FinancingReceivableAllowanceForCreditLosses0.0

ess:NotesReceivableMezzanineLoans, ess:CumulativeEffectPeriodOfAdoptionAdjustment



Period End2020-01-01
Value147000.0
Percentage of FinancingReceivableAllowanceForCreditLosses0.0

dei:LegalEntity

us-gaap:GeneralPartnersCapitalAccount

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value62506234624461736280
Percentage of GeneralPartnersCapitalAccount100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecurities

us-gaap:MortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7572143138132127122118113109
Percentage of HeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesFairValue

us-gaap:MortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7572143138132127122118113109
Percentage of HeldToMaturitySecuritiesFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentBuildingAndBuildingImprovements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value1226311264111801100710844106641074410693106571062910585105361049210116101391009610052980897539700933288268820851752864360423741944167403038233702347734523331325933403265302527612727
Percentage of InvestmentBuildingAndBuildingImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value122631126411180110071084410664107441069310639
Percentage of InvestmentBuildingAndBuildingImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.1

us-gaap:LandAndLandImprovements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value298327732766277827272701271027102719271927192719271925592573257325732522256625692505242624532354135410831057105410541003934901860
Percentage of LandAndLandImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value298327732766277827272701271027102719
Percentage of LandAndLandImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:LimitedPartnersCapitalAccount

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value635757575859515249
Percentage of LimitedPartnersCapitalAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value350552201170002017920176125001641122802462226613521915410214161257153150244210409426348264239
Percentage of LineOfCredit100.0100.0100.0100.00.00.00.0100.00.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value350552201170002179
Percentage of LineOfCredit100.0100.0100.0100.00.00.00.0100.0100.0

us-gaap:LongtermDebtType

us-gaap:LineOfCredit



Period End2020-03-312019-12-31
Value35055
Percentage of LineOfCredit100.0100.0

us-gaap:LongtermDebtType

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us-gaap:LineOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1240124012401240124012401240124012401030
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

us-gaap:LongtermDebtWeightedAverageInterestRate

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value0.0370.0380.0380.0390.0390.0390.0390.0390.0380.0370.0370.0380.0380.0360.0360.0360.036
Percentage of LongtermDebtWeightedAverageInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value0.0410.0410.0430.0430.0440.0430.0440.0440.0420.0420.0420.0430.0430.0430.0430.0440.0440.0440.0450.0440.0450.0460.0460.047
Percentage of LongtermDebtWeightedAverageInterestRate110.8107.9113.2110.3112.8110.3112.8112.8110.5113.5113.5113.2113.2119.4119.4122.20.0122.20.00.00.00.00.00.0

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Period End2020-03-312019-12-31
Value0.0240.025
Percentage of LongtermDebtWeightedAverageInterestRate64.965.8

us-gaap:LoansPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value0.0270.0270.0290.030.030.030.0280.0280.0250.0250.0240.0230.0220.0230.0240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0240.0250.0250.0260.0260.0270.026
Percentage of LongtermDebtWeightedAverageInterestRate73.071.176.376.976.976.971.871.865.867.664.960.557.963.966.766.70.066.70.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MarketableSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value148144216215211209210207197190184151138139153152138137
Percentage of MarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7572144140135129130127122120117114111108105115113110107101999658898986
Percentage of MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestInVariableInterestEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1221221291296464646467666673755252535554
Percentage of NoncontrollingInterestInVariableInterestEntity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesReceivableNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value341342167471716968701001215450402220181922252824226636686711011665050486651494949555536
Percentage of NotesReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value341342167471716968100
Percentage of NotesReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

ess:OtherReceivables



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value141412131112121216161411131111121112151821134
Percentage of NotesReceivableNet40.310.85.917.916.218.017.817.823.216.511.521.926.529.351.360.363.067.366.771.574.554.66.0

ess:RelatedPartyBridgeLoansOnPropertyAcquiredByWescoV



Period End2020-03-312019-12-312019-09-302018-12-31
Value085890
Percentage of NotesReceivableNet0.063.841.20.0

ess:SecuredNoteReceivable9.00InterestRateDueMay2021



Period End2020-03-312019-12-31
Value016
Percentage of NotesReceivableNet0.012.5

ess:SecuredNoteReceivable9.90InterestRateDueNovember2019



Period End2020-03-312019-12-31
Value1312
Percentage of NotesReceivableNet37.89.6

us-gaap:NotesReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value744434343534343433444860
Percentage of NotesReceivableNet22.13.32.05.45.56.25.36.24.75.03.38.07.411.515.723.919.216.019.116.014.432.589.3

us-gaap:OperatingLeaseLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value7676777879
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value7676777879
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:OtherAssets

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-31
Value15813911081101104146166161110111861021211181141119611711018110711011313161816585168778663
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value4136363533333333333333333432343434343434333232322222222222222020202020201918181716
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value413636353333333333
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

ess:TotalCoInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-06-302012-03-312011-12-31
Value181117146122114106101646945656975749096979210995158918383821251051475491595648
Percentage of OtherLiabilities440.2320.4405.9345.9337.9318.5302.0194.0208.4137.4195.3203.4222.1226.6263.5275.1280.8267.2315.4275.1472.8281.9257.8253.3370.4565.5473.4656.9242.6414.7289.1274.6236.4

dei:LegalEntity

us-gaap:PartnersCapital

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value629462816285621562536329637164106330
Percentage of PartnersCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

us-gaap:PartnersCapitalAccountUnits

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value6566666565656666666665
Percentage of PartnersCapitalAccountUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value22222222222
Percentage of PartnersCapitalAccountUnits3.53.53.53.53.53.53.43.43.43.43.4

dei:LegalEntity

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value641764036415634563176393643664746492639662926337
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:AccumulatedOtherComprehensiveIncome, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-19-10-15-15-11-9-4-7-11-15-29
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest-0.3-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.2-0.2-0.5

us-gaap:NoncontrollingInterest, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value12312212912963646464666647
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest1.91.92.02.01.01.01.01.01.01.00.8

us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity

ess:CommonEquity, us-gaap:GeneralPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value62506234624461736206628063256365638362956224
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest97.497.497.397.398.298.298.398.398.398.498.9

ess:CommonEquity, us-gaap:LimitedPartner, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value6357575758595152534949
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest1.00.90.90.90.90.90.80.80.80.80.8

us-gaap:PrepaidExpenseAndOtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value494041454639505660525149534851473935383125331135433492728353626212222252225222521
Percentage of PrepaidExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value494041454639505643
Percentage of PrepaidExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.082.2

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value3818368935673447332932093113299228882769265125342418231122692159205119491858175816581564146913841300125412141173112710811037995954920883845914878842811749
Percentage of RealEstateInvestmentPropertyAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value381836893567344733293209311329922769
Percentage of RealEstateInvestmentPropertyAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyAtCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value15246140381394713786135721336613454134031337613348133041325513211126761271312670126261233112320122691183711252112731087266405443529452485221503347574604434343134167408241604067377234513412
Percentage of RealEstateInvestmentPropertyAtCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value152461403813947137861357213366134541340313358
Percentage of RealEstateInvestmentPropertyAtCost100.0100.0100.0100.0100.0100.0100.0100.0100.1

us-gaap:RealEstateInvestmentPropertyNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value11428103481037910338102421015610341104111048810579106531072110792103641044310510105741038110462105101017996879803948753394188408040744094395237203609338933933284323732453189292926402663
Percentage of RealEstateInvestmentPropertyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value114281034810379103381024210156103411041110588
Percentage of RealEstateInvestmentPropertyNet100.0100.0100.0100.0100.0100.0100.0100.0100.1

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value12126661616360605555565678
Percentage of RealEstateInvestmentPropertyNet0.10.10.60.60.60.60.60.60.50.50.50.50.8

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, ess:NorthernCalifornia



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value5748462246234549441142704229425341824215424142663791
Percentage of RealEstateInvestmentPropertyNet50.344.744.544.043.142.040.940.939.939.839.839.836.6

us-gaap:OperatingSegments, ess:SeattleMetro



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value1469148114441451146114721484149515061520153215441570
Percentage of RealEstateInvestmentPropertyNet12.914.313.914.014.314.514.414.414.414.414.414.415.2

us-gaap:OperatingSegments, ess:SouthernCalifornia



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value4198423342454275430943504566460147444788482248544924
Percentage of RealEstateInvestmentPropertyNet36.740.940.941.442.142.844.244.245.245.345.345.347.5

us-gaap:RedeemableNoncontrollingInterestEquityCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value3237393637353636413940454544444446452423242321230
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value323739363735363639
Percentage of RedeemableNoncontrollingInterestEquityCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value10111716171617161716161515105153232933634367070292835462524232423232223242321211917
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value101117161716171616
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligationPercentage



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.150.190.050.190.270.370.110.2
Percentage of RevenueRemainingPerformanceObligationPercentage100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value887990114114291441180618341890192120082111212222312191220922402252221522242247232222452258225014081404149515111559156515711615172417451750177918111832171116391603
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value8879901141142914411806183418902008
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

ess:MortgageNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value88799011411429144118061834189019212008211121222231219122092240225222152224224723222246
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value6417640364156345631763936436647464926396638364386389629261836215624163376331634463006136609359723557199819931970198418801781171015731553150614461367135512441232127310851084
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnerCapitalComponents, dei:LegalEntity

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value-19-10-15-15-9
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.3-0.2-0.2-0.2-0.2

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value-201000.0104000.026000.051000.0-145000.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.00.00.00.0-0.0

us-gaap:AccumulatedOtherComprehensiveIncome, ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value-19-10-15-15-9
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.3-0.2-0.2-0.2-0.2

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDistributionsInExcessOfNetIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value-708-887-887-857-822-812-808-766-743-833-821-785-741-805-896-856-824-797-782-731-684-650-608-575-498-474-461-484-464-444-448-425-422-408-386-359-338-313-285-260-222-141-90
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-11.0-13.9-13.8-13.5-13.0-12.7-12.6-11.8-11.5-13.0-12.9-12.2-11.6-12.8-14.5-13.8-13.2-12.6-12.4-11.5-10.9-10.6-10.0-9.6-14.0-23.7-23.1-24.6-23.4-23.6-25.2-24.9-26.9-26.3-25.7-24.9-24.7-23.1-22.9-21.2-17.5-13.0-8.3

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value-22-13-19-19-13
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.4-0.2-0.3-0.3-0.2

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value00000000021000
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.00.00.00.00.0-0.0-0.0-0.0-0.00.00.0-0.0-0.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value-22-13-19-18-14-13-8-11-14-18-24-28-29-32-40-43-44-42-50-50-50-51-51-53-56-60-62-62-68-69-76-72-70-72-75-74-77-77-79-68-24-75-8
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.4-0.2-0.3-0.3-0.2-0.2-0.1-0.2-0.2-0.3-0.4-0.4-0.5-0.5-0.6-0.7-0.7-0.7-0.8-0.8-0.8-0.8-0.8-0.9-1.6-3.0-3.1-3.2-3.4-3.7-4.3-4.3-4.5-4.7-5.0-5.2-5.7-5.7-6.4-5.6-1.9-6.9-0.8

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value695971217131703170287093713371317127712971117131703570297024701770107003698069416848665165696414250523452330233123292204211620171877184417761687155515151379132412751043877
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest108.4111.2111.2110.8111.3110.9110.8110.1109.8111.5111.4110.8110.1111.7113.6112.9112.3110.5110.2109.4108.7108.4107.8107.470.4117.4116.9118.4117.4117.3118.8118.0119.3118.7117.9116.7113.7111.8110.8107.4100.196.180.9

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value7000.07000.07000.07000.07000.07000.07000.07000.07000.07000.06000.06000.06000.06000.06000.06000.06000.06000.06000.04000.04000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.03000.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value189183189190125126119120123119118121124100959699991101101141131101131533113113111113115115117115116117119203205206213220233281
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest3.02.93.03.02.02.01.91.91.91.91.91.92.01.61.51.61.61.61.71.71.81.81.81.943.15.75.75.75.76.16.56.87.47.57.88.314.915.116.617.317.321.525.9

us-gaap:LongtermDebtType

us-gaap:UnamortizedDebtIssuanceExpense

ess:MortgageNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value222334444566677788101111
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit



Period End2020-03-312019-12-31
Value43
Percentage of UnamortizedDebtIssuanceExpense187.5146.2

us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value272424212218192020181819171817181415161713
Percentage of UnamortizedDebtIssuanceExpense1150.0942.3831.0632.4594.6440.5438.6446.7418.4335.2315.0303.1250.7244.6232.4236.8182.7195.0153.3154.1116.8

us-gaap:UnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value5258476346864294429337993798379837973501350135403195324633753377293630883090309331132617274527481410141014091409111211129626154654652652651500
Percentage of UnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

dei:LegalEntity

ess:EssexPortfolioL.P.



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value525847634686429442933799379837983501
Percentage of UnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongtermDebtType

ess:FixedRatePublicOfferingBond



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value47094214406236703670317531753174317428782878287825322834283628392400
Percentage of UnsecuredDebt89.688.586.785.585.583.683.683.683.682.282.281.379.387.384.084.177.7

ess:UnsecuredBondsPrivatePlacement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value199199274274274274274274274274274314314314314314463
Percentage of UnsecuredDebt3.84.25.96.46.47.27.27.27.27.87.88.99.89.79.39.315.0

us-gaap:LoansPayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-11-302016-10-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value349349349348348348348348348348348348348100350225224224224224224224225225350350350350350350350350200
Percentage of UnsecuredDebt6.67.37.48.18.19.29.29.29.210.010.09.810.93.10.00.06.76.77.67.37.37.37.28.612.712.724.824.824.824.831.531.543.0

Line plots across dimensions of each concept

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments


us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService


us-gaap:ProfitLoss us-gaap:StatementEquityComponents


us-gaap:ProfitLoss us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity


us-gaap:ProfitLoss us-gaap:StatementEquityComponents


us-gaap:ProfitLoss us-gaap:PartnerCapitalComponents, us-gaap:PartnerTypeOfPartnersCapitalAccount, dei:LegalEntity