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		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Weighted Average Number Of Diluted Shares Outstanding		7.51	NA	7.52	7.51	7.51	NA	7.34	7.33	7.32	NA	7.17	7.15	7.14	NA	7.04	7.02	7.04	NA	6.99	6.99	7.00	NA	6.94	6.94	6.94	NA	6.87	6.85	6.84	NA	6.79	6.87	6.88	NA	6.93	7.05	7.21	NA	7.53	7.72	7.86	NA	8.00	8.18	8.40	NA	8.41	8.40	8.39	NA	8.42	8.41	8.40	NA	8.35	8.34
Weighted Average Number Of Shares Outstanding Basic		7.45	NA	7.52	7.51	7.43	NA	7.34	7.33	7.25	NA	7.17	7.15	7.10	NA	7.04	7.02	7.00	NA	6.99	6.99	6.95	NA	6.94	6.94	6.89	NA	6.84	6.83	6.81	NA	6.79	6.86	6.86	NA	6.92	7.05	7.19	NA	7.51	7.71	7.85	NA	7.99	8.18	8.36	NA	8.39	8.39	8.38	NA	8.39	8.39	8.36	NA	8.33	8.33
Earnings Per Share Basic		0.61	-5.88	-0.51	0.34	0.77	1.87	1.45	5.07	1.73	1.08	3.47	0.91	1.26	-0.77	1.14	0.86	0.88	0.91	1.47	1.14	2.16	1.59	1.33	0.92	1.19	1.48	1.23	0.99	0.73	3.56	-0.07	0.45	0.41	2.65	0.45	-0.04	0.14	-5.57	1.02	-0.47	-0.19	2.86	1.54	0.63	0.53	2.83	4.53	2.60	3.01	6.48	3.06	2.29	7.51	4.61	1.62	1.91
Earnings Per Share Diluted		0.61	-5.87	-0.51	0.34	0.76	1.82	1.45	5.07	1.72	1.06	3.47	0.91	1.25	-0.78	1.14	0.86	0.88	0.90	1.47	1.14	2.15	1.57	1.33	0.92	1.18	1.47	1.23	0.99	0.73	3.53	-0.07	0.45	0.41	2.63	0.45	-0.04	0.14	-5.57	1.02	-0.47	-0.19	2.85	1.54	0.63	0.53	2.81	4.52	2.60	3.00	6.47	3.05	2.28	7.48	4.60	1.62	1.91

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Revenue From Contract With Customer Excluding Assessed Tax		53.29	56.76	46.55	61.35	50.14	63.53	61.79	61.37	55.02	49.10	51.74	45.90	45.10	23.14	32.30	35.35	37.64	26.94	32.60	41.35	40.10	39.05	31.44	33.68	31.20	26.44	21.94	28.10	168.58	284.22	220.79	178.01	173.42	286.52	239.11	196.50	193.73	297.29	221.71	200.37	177.41	311.98	228.61	196.02	196.05	318.20	210.10	773.40	803.20	273.90	823.40	811.00	745.50	866.20	664.90	598.80
Revenues		53.29	56.76	46.55	61.35	50.14	63.53	61.79	61.37	55.02	49.10	51.74	45.90	45.10	23.14	32.30	35.35	37.64	26.94	32.60	41.35	40.10	39.05	31.44	33.68	31.20	26.44	21.94	181.08	168.58	284.22	220.79	178.01	173.42	286.52	239.11	196.50	193.73	297.29	221.71	200.37	177.41	311.98	228.61	196.02	196.05	318.20	210.10	773.40	803.20	273.90	823.40	811.00	745.50	866.20	664.90	598.80
Cost Of Goods And Services Sold		46.27	49.76	48.72	54.94	46.78	45.01	43.97	45.73	39.18	36.66	37.41	36.91	37.41	21.91	25.48	31.52	32.56	24.05	26.42	32.68	26.71	25.45	25.34	28.84	25.78	21.15	19.47	23.50	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	633.30	658.60	770.20	685.90	673.10	608.90	698.90	534.80	475.70
Gross Profit		7.02	7.00	-2.17	6.41	3.36	18.52	17.83	15.64	15.85	12.45	14.33	8.98	7.69	1.23	6.82	3.84	5.08	2.89	6.19	8.67	13.38	13.60	6.09	4.85	5.42	5.29	2.48	43.43	39.13	73.61	51.71	40.53	40.01	63.71	42.22	35.38	38.19	65.83	46.54	36.52	36.17	78.18	49.22	47.63	46.26	84.80	52.30	140.10	144.60	181.10	137.50	137.90	136.60	167.30	130.10	123.10
Operating Expenses		15.57	86.77	16.85	15.74	15.37	16.43	22.60	14.58	15.49	15.94	14.72	13.86	14.70	24.52	12.57	13.14	13.50	14.30	14.96	13.65	13.28	14.92	12.69	12.47	11.26	15.52	11.68	46.32	46.72	57.67	66.11	48.35	47.24	53.74	48.69	46.17	47.50	151.32	47.28	51.98	49.19	61.59	44.34	49.11	51.34	58.90	49.00	119.20	49.46	123.60	111.20	116.30	NA	122.70	109.30	105.30
Selling General And Administrative Expense		15.45	19.88	16.12	14.75	14.88	15.50	17.79	15.84	14.78	15.25	13.83	12.88	13.76	15.91	11.83	12.59	12.73	14.00	14.34	12.79	12.65	14.67	12.03	11.86	10.63	15.68	11.72	48.00	45.79	56.61	47.50	47.53	46.26	54.74	47.55	45.22	46.42	52.91	46.37	50.99	48.43	57.58	43.32	48.48	50.99	60.30	52.10	121.50	118.80	124.40	111.10	116.40	113.40	121.50	105.20	104.80
Operating Income Loss		4.76	-67.43	-6.27	1.75	1.81	15.54	9.82	29.68	14.94	10.82	27.59	8.67	8.33	-8.01	9.40	4.48	7.58	4.62	8.66	9.16	16.37	15.55	10.55	7.80	9.72	6.51	6.99	10.58	7.37	30.39	0.70	5.21	5.41	21.54	5.76	1.29	3.24	-73.16	11.32	-3.89	-0.58	28.83	16.68	8.80	7.02	37.00	14.80	31.50	37.80	42.30	37.40	31.10	35.30	56.70	32.10	27.30
Interest Expense		1.11	0.71	0.63	0.57	0.55	0.54	0.49	0.50	0.51	0.51	0.49	0.36	0.36	0.28	0.34	0.33	0.40	0.19	0.23	0.22	0.23	0.36	0.42	0.57	0.65	0.63	0.95	1.39	1.35	1.40	1.32	1.47	1.50	1.54	1.60	1.66	2.12	2.12	2.05	1.95	1.45	1.28	1.04	1.15	1.30	1.40	1.50	4.90	5.50	5.80	6.40	6.10	6.20	6.70	7.00	6.90
Income Tax Expense Benefit		1.00	-21.97	-2.02	0.74	-1.32	2.44	0.87	7.89	2.36	3.49	2.60	2.93	-0.30	-1.86	1.86	-0.47	-0.07	-1.70	1.36	1.79	2.32	3.93	1.46	1.19	0.80	-3.92	2.62	2.69	1.67	5.87	-0.54	-1.44	0.98	2.36	0.13	-0.06	0.38	-36.59	1.37	-2.67	-0.56	4.60	3.16	2.10	1.42	9.10	3.40	3.70	8.50	14.10	6.20	7.20	24.20	7.00	6.10	0.90
Net Income Loss		4.57	-43.97	-3.83	2.52	5.69	13.78	10.61	37.18	12.58	7.82	24.84	6.50	8.96	-5.45	8.02	6.05	6.17	6.38	10.26	7.97	15.02	11.02	9.20	6.39	8.18	10.17	8.40	6.79	4.98	24.13	-0.44	3.12	2.80	18.09	3.14	-0.28	1.03	-40.67	7.70	-3.62	-1.52	22.56	12.32	5.15	4.42	23.70	38.00	21.80	25.20	54.40	25.70	19.20	62.80	38.40	13.50	15.90
Comprehensive Income Net Of Tax		4.65	-44.67	-3.81	2.54	5.71	12.59	10.73	37.30	12.70	10.82	24.98	6.65	9.10	-6.06	8.12	6.15	6.32	8.41	10.33	8.05	15.12	10.86	9.30	6.50	8.32	11.28	8.54	7.36	6.22	23.34	-0.01	1.86	1.93	17.61	1.47	-0.44	0.09	-48.41	8.01	-3.95	-1.70	27.40	15.08	5.72	5.86	22.10	48.90	9.50	37.70	35.70	10.30	28.40	72.10	37.90	26.20	2.30

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Assets		538.00	539.71	580.90	571.51	562.12	568.07	560.20	547.34	513.01	507.22	488.92	474.04	479.23	476.18	465.90	442.95	435.92	444.77	412.77	399.18	393.79	376.99	366.55	366.02	374.18	389.55	384.95	621.26	620.29	668.02	664.11	609.52	606.51	655.41	702.72	651.40	653.64	770.52	829.16	788.79	780.00	809.96	778.09	698.12	713.73	776.30	822.00	1704.80	1749.80	1801.40	1757.50	1754.40	NA	1658.30	NA	NA
Liabilities		156.38	157.37	152.46	138.11	130.44	141.11	144.78	144.74	148.51	155.10	148.00	158.31	169.86	175.56	159.41	143.68	142.08	155.38	129.51	127.03	129.52	126.29	126.34	135.05	149.29	170.10	177.89	390.30	395.76	447.73	467.80	410.55	404.50	454.27	517.97	459.31	450.69	559.05	559.92	514.01	490.46	512.18	502.37	430.09	433.24	494.90	530.90	1088.10	1139.10	1224.40	1209.70	1213.20	NA	1210.10	NA	NA
Liabilities And Stockholders Equity		538.00	539.71	580.90	571.51	562.12	568.07	560.20	547.34	513.01	507.22	488.92	474.04	479.23	476.18	465.90	442.95	435.92	444.77	412.77	399.18	393.79	376.99	366.55	366.02	374.18	389.55	384.95	621.26	620.29	668.02	664.11	609.52	606.51	655.41	702.72	651.40	653.64	770.52	829.16	788.79	780.00	809.96	778.09	698.12	713.73	776.30	822.00	1704.80	1749.80	1801.40	1757.50	1754.40	NA	1658.30	NA	NA
Stockholders Equity		381.61	382.34	428.44	433.40	431.69	426.97	415.42	402.60	364.49	352.12	340.92	315.73	309.37	300.62	306.49	299.27	293.84	289.39	283.25	272.15	264.27	250.70	240.20	230.97	224.88	219.45	207.06	230.96	224.53	220.29	196.31	198.97	202.02	201.14	184.74	192.09	202.95	211.47	269.24	274.79	289.54	297.78	275.72	268.03	280.49	281.40	291.10	615.90	609.90	576.20	547.10	540.50	NA	447.40	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Assets Current		212.84	232.00	258.15	262.11	256.25	260.41	229.28	218.58	206.65	203.05	192.38	189.31	192.78	188.15	198.60	190.70	188.93	200.67	180.31	175.58	164.03	164.17	151.47	152.39	162.29	176.99	164.25	343.96	330.89	381.73	384.25	320.96	315.77	361.43	411.29	359.60	355.01	465.71	450.44	406.34	403.24	461.29	454.95	392.64	406.86	486.80	509.10	1274.10	1341.40	1375.10	1331.00	1311.40	NA	1214.20	NA	NA
Cash And Cash Equivalents At Carrying Value		61.84	85.11	128.17	117.02	109.64	110.75	92.75	97.11	81.62	86.00	87.51	85.01	79.13	88.45	97.57	95.55	93.73	122.89	115.06	98.42	79.06	85.26	83.05	79.95	83.40	101.60	93.94	60.21	56.43	80.65	44.27	34.26	35.72	52.50	11.85	19.32	29.31	61.13	50.60	60.91	70.07	95.39	79.35	85.06	96.87	139.90	155.70	303.20	314.90	338.60	217.60	301.50	249.80	261.90	215.90	270.00
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents		61.84	85.11	128.17	117.02	109.64	110.75	92.75	97.11	81.62	86.00	87.51	85.01	79.13	88.45	97.57	95.55	93.73	122.89	115.06	98.42	79.06	85.26	83.05	79.95	83.40	101.60	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Inventory Net		75.75	77.00	69.22	65.21	71.25	71.49	61.80	56.96	55.97	54.09	50.95	49.72	45.10	47.55	42.43	35.73	36.00	40.47	33.09	30.88	32.80	31.21	33.18	29.16	30.11	30.02	30.58	163.76	158.98	157.34	201.31	167.59	164.33	165.02	234.21	203.17	187.10	190.38	220.61	188.15	193.91	184.44	207.35	167.47	162.23	169.40	205.40	474.80	477.90	470.30	540.70	491.20	NA	447.40	NA	NA
Other Assets Current		19.56	15.50	12.31	12.83	12.92	15.91	17.16	14.25	12.21	14.62	15.27	9.06	12.31	8.31	13.00	19.09	NA	6.53	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Amortization Of Intangible Assets		0.13	0.70	0.64	0.93	0.73	0.95	0.87	1.06	0.85	0.76	0.90	0.91	0.98	0.27	0.73	0.79	0.78	0.36	0.71	0.88	0.65	0.83	0.71	0.81	0.68	0.48	0.43	0.96	0.93	0.93	1.16	0.83	0.98	0.81	1.14	0.95	1.08	0.63	0.91	0.99	0.77	0.93	1.08	0.62	1.04	0.96	0.77	0.46	NA	NA	NA	NA	NA	NA	NA	NA
Finite Lived Intangible Assets Net		5.88	6.01	25.76	26.40	27.33	28.05	29.00	29.87	30.93	31.77	32.53	33.44	34.35	35.33	35.60	36.33	37.12	37.90	38.27	38.99	39.87	40.52	41.34	42.06	42.87	43.55	44.04	51.06	52.03	52.96	53.87	55.03	55.86	56.84	57.65	58.79	59.74	60.82	57.02	57.93	58.92	59.69	60.62	61.69	62.31	63.40	71.90	56.80	57.30	57.90	58.50	59.10	NA	60.00	NA	NA
Other Assets Noncurrent		43.63	41.68	41.28	41.51	38.60	40.31	50.77	47.02	51.93	51.23	46.09	45.22	43.24	40.98	39.11	36.62	31.79	28.19	29.78	24.63	25.08	24.41	23.64	23.31	22.51	23.06	22.74	26.17	26.41	26.56	71.30	64.98	62.70	56.33	59.77	60.96	64.42	62.28	69.66	70.16	71.98	69.72	64.68	54.19	54.09	36.70	40.00	95.20	94.10	110.60	108.70	109.30	NA	108.50	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Liabilities Current		63.94	69.99	60.87	37.51	34.01	44.27	43.97	43.64	36.42	46.02	40.91	40.42	45.92	52.26	36.58	39.26	38.11	61.97	52.77	53.17	49.57	42.25	44.19	45.92	40.84	53.98	43.22	186.05	167.20	221.83	229.51	161.68	140.80	191.75	256.00	192.80	185.22	254.68	287.50	234.43	202.06	238.12	250.47	173.46	181.25	227.20	243.80	690.30	870.50	891.20	842.60	719.50	NA	663.50	NA	NA
Other Liabilities Current		6.26	7.12	8.58	7.31	7.13	6.62	9.15	8.43	8.66	8.30	9.09	8.81	8.46	8.22	6.79	6.67	6.63	8.89	7.81	7.94	7.33	6.52	7.17	6.44	7.25	8.05	10.96	30.54	26.63	31.14	30.56	27.39	25.37	28.11	45.27	34.25	36.08	36.96	41.33	37.87	32.84	35.88	40.42	30.51	27.37	33.20	40.80	141.50	139.90	160.70	157.00	155.60	NA	140.60	NA	NA
Contract With Customer Liability Current		0.93	0.88	1.30	1.12	2.04	0.83	1.33	1.80	2.99	4.08	0.82	0.87	0.91	0.94	0.94	0.94	0.94	0.94	0.73	0.71	0.72	0.75	0.79	0.69	0.86	0.86	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Long Term Debt		NA	35.84	NA	NA	NA	18.87	NA	NA	NA	20.37	NA	NA	NA	45.00	NA	NA	NA	24.30	NA	NA	NA	10.57	NA	NA	NA	56.70	NA	NA	NA	NA	128.30	141.70	153.40	159.80	163.50	168.20	177.60	236.26	204.70	217.30	210.60	170.68	161.40	152.50	162.00	166.00	203.10	302.50	NA	370.70	NA	NA	NA	NA	NA	NA
Long Term Debt And Capital Lease Obligations		28.38	22.00	18.95	20.05	17.43	16.02	15.32	15.50	22.57	18.18	14.50	21.80	24.29	24.35	NA	NA	NA	17.15	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	15.20	NA	NA	NA	61.90	NA	NA	NA	NA	NA	NA
Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent		5.06	5.18	4.05	4.31	4.78	5.08	4.94	5.42	6.00	6.61	7.36	7.85	8.31	8.84	7.43	7.88	8.32	8.81	9.37	9.71	10.07	10.43	10.55	10.92	11.29	11.83	12.92	13.39	13.78	14.27	12.36	12.75	13.09	10.05	9.71	9.83	10.50	10.62	7.31	7.36	7.41	7.65	15.47	23.17	23.73	24.40	24.50	72.20	75.70	81.00	56.20	67.30	NA	77.80	NA	NA
Other Liabilities Noncurrent		6.71	6.12	6.07	8.55	7.81	8.50	7.70	7.17	7.34	7.53	11.45	12.46	12.60	12.06	12.40	8.51	7.68	8.10	6.70	6.86	6.72	15.58	15.20	13.97	13.63	12.34	11.11	51.79	50.64	53.07	53.45	51.06	51.86	52.59	53.16	52.11	52.16	64.92	66.63	66.01	60.12	59.43	55.02	51.89	50.55	51.60	45.60	114.20	112.30	110.40	119.10	117.90	NA	113.50	NA	NA
Operating Lease Liability Noncurrent		7.96	8.78	8.20	7.05	7.28	7.53	8.94	9.21	9.48	9.73	10.11	10.48	10.84	11.20	11.49	11.78	12.12	12.45	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Stockholders Equity		381.61	382.34	428.44	433.40	431.69	426.97	415.42	402.60	364.49	352.12	340.92	315.73	309.37	300.62	306.49	299.27	293.84	289.39	283.25	272.15	264.27	250.70	240.20	230.97	224.88	219.45	207.06	230.96	224.53	220.29	196.31	198.97	202.02	201.14	184.74	192.09	202.95	211.47	269.24	274.79	289.54	297.78	275.72	268.03	280.49	281.40	291.10	615.90	609.90	576.20	547.10	540.50	NA	447.40	NA	NA
Additional Paid In Capital Common Stock		29.07	28.67	25.41	24.91	24.11	23.71	23.23	19.63	17.31	16.33	14.54	12.93	11.82	10.89	9.38	8.94	8.32	8.91	9.83	7.73	6.57	7.04	6.34	5.27	4.54	4.45	2.22	0.00	0.00	0.00	NA	0.00	0.71	0.00	NA	0.00	0.00	0.00	0.00	0.00	0.00	0.94	0.37	4.18	20.04	24.50	24.90	24.30	23.20	22.70	24.80	24.10	NA	22.60	NA	NA
Retained Earnings Accumulated Deficit		354.67	355.87	404.48	409.95	409.06	404.92	392.67	383.57	347.92	336.78	330.37	306.95	301.86	294.27	301.05	294.38	289.68	284.85	279.80	270.87	264.22	250.35	239.82	231.76	226.51	216.49	207.45	248.24	242.38	239.44	214.67	217.73	218.74	217.75	200.85	206.40	216.93	224.43	274.30	279.92	294.18	301.23	327.75	318.88	315.77	313.60	321.30	657.60	640.40	619.70	569.80	548.50	NA	475.40	NA	NA
Accumulated Other Comprehensive Income Loss Net Of Tax		-9.58	-9.65	-8.95	-8.97	-8.99	-9.01	-7.82	-7.94	-8.06	-8.18	-11.17	-11.31	-11.46	-11.60	-10.98	-11.08	-11.18	-11.34	-13.37	-13.44	-13.51	-13.61	-12.90	-13.00	-13.11	-8.34	-9.45	-24.11	-24.69	-25.93	-25.13	-25.57	-24.32	-23.44	-22.96	-21.29	-21.12	-20.19	-12.45	-12.76	-12.44	-12.26	-60.33	-63.08	-63.65	-65.10	-63.50	-74.40	-62.10	-74.60	NA	NA	NA	NA	NA	NA
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value		0.53	NA	1.32	0.81	0.56	NA	3.61	2.33	1.12	NA	1.63	1.12	1.01	NA	0.45	0.63	0.47	NA	2.12	1.25	0.90	NA	1.35	0.79	0.18	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.58	0.36	0.36	0.51	2.00	0.40	0.74	1.06	-0.10	0.50	NA	NA	NA	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Net Cash Provided By Used In Operating Activities		-9.76	-8.53	39.73	17.03	6.25	12.81	14.45	41.55	-1.07	7.08	38.48	30.23	-0.91	-5.25	15.25	18.63	-31.12	5.52	25.18	22.63	-0.54	15.77	20.16	26.73	-8.03	14.19	28.86	40.46	-42.20	47.78	29.19	20.79	-3.82	48.19	9.93	12.41	37.47	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	49.20	2.50	103.90	-4.60	64.70	-8.80	58.70	-35.00	NA
Net Cash Provided By Used In Investing Activities		-14.63	-44.04	-24.86	-6.24	-6.46	6.09	-17.12	-17.59	-4.53	-9.11	-18.95	-11.24	-4.85	-24.80	-6.54	-9.30	-5.34	-11.45	-2.86	-1.71	-4.25	-4.96	-5.14	-6.19	-2.09	-4.36	-4.64	-2.17	-3.84	0.11	-1.32	-5.28	-3.32	-1.97	-3.26	-1.54	-1.52	-27.64	-6.50	-8.90	-31.90	-31.88	-16.14	-6.09	-6.63	NA	-53.30	-17.30	15.10	-7.40	-9.50	-10.00	-5.80	-6.90	8.40	NA
Net Cash Provided By Used In Financing Activities		1.13	9.51	-3.73	-3.42	-0.90	-0.90	-1.69	-8.47	1.21	0.53	-17.03	-13.11	-3.56	20.93	-6.69	-7.51	7.30	13.76	-5.68	-1.56	-1.41	-8.60	-11.91	-23.98	-8.08	-2.17	12.61	-34.21	21.46	-11.35	-17.86	-16.84	-9.65	-5.58	-14.15	-20.82	-67.76	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	-40.50	-44.30	28.70	-65.90	-3.80	-1.00	-4.20	-31.40	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Net Cash Provided By Used In Operating Activities		-9.76	-8.53	39.73	17.03	6.25	12.81	14.45	41.55	-1.07	7.08	38.48	30.23	-0.91	-5.25	15.25	18.63	-31.12	5.52	25.18	22.63	-0.54	15.77	20.16	26.73	-8.03	14.19	28.86	40.46	-42.20	47.78	29.19	20.79	-3.82	48.19	9.93	12.41	37.47	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	49.20	2.50	103.90	-4.60	64.70	-8.80	58.70	-35.00	NA
Net Income Loss		4.57	-43.97	-3.83	2.52	5.69	13.78	10.61	37.18	12.58	7.82	24.84	6.50	8.96	-5.45	8.02	6.05	6.17	6.38	10.26	7.97	15.02	11.02	9.20	6.39	8.18	10.17	8.40	6.79	4.98	24.13	-0.44	3.12	2.80	18.09	3.14	-0.28	1.03	-40.67	7.70	-3.62	-1.52	22.56	12.32	5.15	4.42	23.70	38.00	21.80	25.20	54.40	25.70	19.20	62.80	38.40	13.50	15.90
Depreciation Depletion And Amortization		5.69	7.96	7.32	7.09	7.02	7.63	6.57	6.49	6.13	6.09	5.80	5.62	5.58	4.07	4.88	4.62	4.54	4.14	4.04	4.24	3.81	3.75	3.81	3.72	3.40	3.19	0.68	4.42	4.49	5.35	5.21	4.52	4.19	6.34	5.78	5.80	5.76	8.62	6.85	6.62	5.98	8.20	6.17	4.84	5.37	6.60	-9.20	10.30	10.30	12.20	12.60	11.40	11.50	13.60	12.40	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Net Cash Provided By Used In Investing Activities		-14.63	-44.04	-24.86	-6.24	-6.46	6.09	-17.12	-17.59	-4.53	-9.11	-18.95	-11.24	-4.85	-24.80	-6.54	-9.30	-5.34	-11.45	-2.86	-1.71	-4.25	-4.96	-5.14	-6.19	-2.09	-4.36	-4.64	-2.17	-3.84	0.11	-1.32	-5.28	-3.32	-1.97	-3.26	-1.54	-1.52	-27.64	-6.50	-8.90	-31.90	-31.88	-16.14	-6.09	-6.63	NA	-53.30	-17.30	15.10	-7.40	-9.50	-10.00	-5.80	-6.90	8.40	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Net Cash Provided By Used In Financing Activities		1.13	9.51	-3.73	-3.42	-0.90	-0.90	-1.69	-8.47	1.21	0.53	-17.03	-13.11	-3.56	20.93	-6.69	-7.51	7.30	13.76	-5.68	-1.56	-1.41	-8.60	-11.91	-23.98	-8.08	-2.17	12.61	-34.21	21.46	-11.35	-17.86	-16.84	-9.65	-5.58	-14.15	-20.82	-67.76	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	-40.50	-44.30	28.70	-65.90	-3.80	-1.00	-4.20	-31.40	NA
Payments Of Dividends		1.63	1.63	1.64	1.63	1.56	1.52	1.52	1.52	1.45	1.42	1.41	1.41	1.37	1.33	1.35	1.35	1.34	1.32	1.33	1.33	1.15	1.15	1.14	1.15	1.14	1.13	1.86	1.86	1.83	1.81	1.81	1.83	1.80	1.79	1.81	1.84	1.85	1.87	1.93	1.99	1.96	1.97	2.00	2.03	2.10	31.40	4.60	4.60	4.50	4.50	4.40	4.50	4.40	4.40	4.30	NA
Payments For Repurchase Of Common Stock		4.27	2.28	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.00	0.00	0.00	1.00	1.60	0.03	0.09	1.30	0.95	0.28	0.06	0.00	0.00	0.00	NA	NA	0.00	2.22	3.83	0.00	0.76	7.24	9.10	6.91	8.63	12.20	9.26	4.99	3.95	5.75	16.51	5.10	2.60	0.00	0.00	0.60	2.10	0.00	0.00	0.00	NA	NA	NA

		2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-12-31	2021-09-30	2021-06-30	2021-03-31	2020-12-31	2020-09-30	2020-06-30	2020-03-31	2019-12-31	2019-09-30	2019-06-30	2019-03-31	2018-12-31	2018-09-30	2018-06-30	2018-03-31	2017-12-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30
Revenues		53.29	56.76	46.55	61.35	50.14	63.53	61.79	61.37	55.02	49.10	51.74	45.90	45.10	23.14	32.30	35.35	37.64	26.94	32.60	41.35	40.10	39.05	31.44	33.68	31.20	26.44	21.94	181.08	168.58	284.22	220.79	178.01	173.42	286.52	239.11	196.50	193.73	297.29	221.71	200.37	177.41	311.98	228.61	196.02	196.05	318.20	210.10	773.40	803.20	273.90	823.40	811.00	745.50	866.20	664.90	598.80
Revenue From Contract With Customer Excluding Assessed Tax		53.29	56.76	46.55	61.35	50.14	63.53	61.79	61.37	55.02	49.10	51.74	45.90	45.10	23.14	32.30	35.35	37.64	26.94	32.60	41.35	40.10	39.05	31.44	33.68	31.20	26.44	21.94	28.10	168.58	284.22	220.79	178.01	173.42	286.52	239.11	196.50	193.73	297.29	221.71	200.37	177.41	311.98	228.61	196.02	196.05	318.20	210.10	773.40	803.20	273.90	823.40	811.00	745.50	866.20	664.90	598.80
		-0.40	-0.91	-0.55	-0.51	-0.62	-0.40	-1.03	-0.63	-0.29	-2.20	-1.83	-1.17	-0.42	-0.98	-1.17	-0.58	-0.17	-0.20	-0.26	-0.32	-0.66	-0.81	-0.14	-0.11	-0.09	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Corporate Non		3.26	1.67	0.97	4.63	1.19	1.05	1.09	0.62	0.19	2.05	1.59	0.91	0.14	0.88	0.90	0.33	0.03	0.06	0.05	0.13	0.54	0.67	0.00	0.00	0.00	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Operating, Coal Mining		15.54	19.75	18.66	26.34	20.65	25.04	22.60	26.60	20.96	21.37	23.68	23.06	23.74	9.19	20.39	21.57	20.93	10.58	18.80	22.57	16.75	24.51	18.58	20.86	17.60	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Operating, Minerals Management		10.40	9.78	5.75	9.17	8.29	19.35	16.17	11.96	12.75	9.29	10.61	5.61	5.50	4.77	2.72	1.99	5.24	4.17	5.02	8.24	12.69	6.11	3.90	3.87	3.48	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Operating, North American Mining		24.48	26.46	21.72	21.72	20.63	18.48	22.96	22.81	21.40	18.60	17.69	17.49	16.14	9.28	9.44	12.05	11.62	12.33	8.99	10.73	10.78	8.58	9.09	9.07	10.21	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Transferred At Point In Time		15.11	19.43	17.97	25.73	20.15	24.44	22.04	25.99	20.37	18.58	20.44	20.12	21.38	6.94	19.87	20.98	20.28	10.09	18.05	21.88	16.09	23.68	17.98	20.17	17.02	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Transferred Over Time		38.18	37.33	28.58	35.62	30.00	39.09	39.75	35.38	34.65	30.52	31.31	25.78	23.73	16.20	12.42	14.38	17.36	16.85	14.55	19.47	24.01	15.38	13.46	13.51	14.18	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

Plots across concepts

Line plots across dimensions of each concept