SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Consolidating Financial Statements, Captions
Revenues	$ 704,666	$ 807,895	$ 2,207,007	$ 2,495,903
Cost of Goods and Services Sold	546,282	713,274	1,750,751	2,207,962
Selling, General and Administrative Expense	65,974	71,823	194,512	223,031
Depreciation and amortization	29,843	37,404	104,112	114,349
Restructuring Charges	4,744	2,327	13,490	18,206
Litigation Judgment Gain, net of expenses	(3,857)	0	(9,257)	0
(Gain) Loss on Disposition of Business	60,019	0	55,190	17,837
Operating Income (Loss)	703,005	824,828	2,108,798	2,581,385
Operating Income (Loss)	1,661	(16,933)	98,209	(85,482)
Intercompany Interest and Charges	0	0	0	0
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	(13,989)	(16,520)	(57,280)	(49,581)
Interest expense and other	33,178	29,309	96,069	83,515
Income (loss) from continuing operations before income taxes	(17,528)	(29,722)	59,420	(119,416)
Income tax expense (benefit)	(3,682)	1,223	12,477	2,739
Net Income (Loss) Attributable to Parent	(13,846)	(30,945)	46,943	(122,155)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	20,602	(8,404)	(57,615)	(22,759)
Total comprehensive income	6,756	(39,349)	(10,672)	(144,914)
Consolidation, Eliminations [Member]
Consolidating Financial Statements, Captions
Revenues	(21,401)	(19,386)	(64,003)	(59,837)
Cost of Goods and Services Sold	(21,401)	(19,386)	(64,003)	(59,837)
Selling, General and Administrative Expense	0	0	0	0
Depreciation and amortization	0	0	0	0
Restructuring Charges	0	0	0	0
Litigation Judgment Gain, net of expenses	0		0
(Gain) Loss on Disposition of Business	0	0	0	0
Operating Income (Loss)	(21,401)	(19,386)	(64,003)	(59,837)
Operating Income (Loss)	0	0	0	0
Intercompany Interest and Charges	0	0	0	0
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	0	0	0	0
Interest expense and other	0	0	0	0
Income (loss) from continuing operations before income taxes	0	0	0	0
Income tax expense (benefit)	0	0	0	0
Net Income (Loss) Attributable to Parent	0	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0	0	0
Total comprehensive income	0	0	0	0
Parent
Consolidating Financial Statements, Captions
Revenues	0	0	0	0
Cost of Goods and Services Sold	0	0	0	0
Selling, General and Administrative Expense	16,785	17,720	50,340	57,210
Depreciation and amortization	847	744	2,532	2,200
Restructuring Charges	0	0	540	2,766
Litigation Judgment Gain, net of expenses	(3,857)		(9,257)
(Gain) Loss on Disposition of Business	60,019	0	65,311	16,890
Operating Income (Loss)	73,794	18,464	109,466	79,066
Operating Income (Loss)	(73,794)	(18,464)	(109,466)	(79,066)
Intercompany Interest and Charges	(33,662)	(39,513)	(103,245)	(118,352)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	0	0	0	0
Interest expense and other	26,362	25,476	80,016	73,855
Income (loss) from continuing operations before income taxes	(66,494)	(4,427)	(86,237)	(34,569)
Income tax expense (benefit)	(15,067)	(14,248)	(20,635)	16,297
Net Income (Loss) Attributable to Parent	(51,427)	9,821	(65,602)	(50,866)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,501	(279)	3,105	(349)
Total comprehensive income	(46,926)	9,542	(62,497)	(51,215)
Guarantor Subsidiaries [Member]
Consolidating Financial Statements, Captions
Revenues	646,198	735,753	2,027,649	2,286,932
Cost of Goods and Services Sold	505,420	660,002	1,625,567	2,052,427
Selling, General and Administrative Expense	42,854	46,033	123,664	140,892
Depreciation and amortization	26,089	32,640	93,109	99,302
Restructuring Charges	4,744	2,327	12,950	15,440
Litigation Judgment Gain, net of expenses	0		0
(Gain) Loss on Disposition of Business	0	0	(10,121)	947
Operating Income (Loss)	579,107	741,002	1,845,169	2,309,008
Operating Income (Loss)	67,091	(5,249)	182,480	(22,076)
Intercompany Interest and Charges	32,005	37,484	98,297	112,281
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	(13,485)	(16,188)	(55,788)	(48,562)
Interest expense and other	5,871	4,007	17,423	13,334
Income (loss) from continuing operations before income taxes	42,700	(30,552)	122,548	(99,129)
Income tax expense (benefit)	10,319	14,325	30,398	(15,761)
Net Income (Loss) Attributable to Parent	32,381	(44,877)	92,150	(83,368)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,617	(174)	(62,995)	(609)
Total comprehensive income	36,998	(45,051)	29,155	(83,977)
Non-Guarantor Subsidiaries
Consolidating Financial Statements, Captions
Revenues	79,869	91,528	243,361	268,808
Cost of Goods and Services Sold	62,263	72,658	189,187	215,372
Selling, General and Administrative Expense	6,335	8,070	20,508	24,929
Depreciation and amortization	2,907	4,020	8,471	12,847
Restructuring Charges	0	0	0	0
Litigation Judgment Gain, net of expenses	0		0
(Gain) Loss on Disposition of Business	0	0	0	0
Operating Income (Loss)	71,505	84,748	218,166	253,148
Operating Income (Loss)	8,364	6,780	25,195	15,660
Intercompany Interest and Charges	1,657	2,029	4,948	6,071
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	(504)	(332)	(1,492)	(1,019)
Interest expense and other	945	(174)	(1,370)	(3,674)
Income (loss) from continuing operations before income taxes	6,266	5,257	23,109	14,282
Income tax expense (benefit)	1,066	1,146	2,714	2,203
Net Income (Loss) Attributable to Parent	5,200	4,111	20,395	12,079
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	11,484	(7,951)	2,275	(21,801)
Total comprehensive income	$ 16,684	$ (3,840)	$ 22,670	$ (9,722)