Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net loss	$ (30,351)	$ (275,786)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	15,431	28,602
Impairment of long-lived assets		252,382
Amortization of acquired contract liability	(1,214)	(10,987)
Loss on sale of assets and businesses	5,969
Curtailments and special termination benefits loss, net	16,078
Other amortization included in interest expense	4,002	2,191
(Recovery of) provision for credit losses	(28)	3,280
Share-based compensation	2,247	2,786
Changes in other assets and liabilities, excluding the effects of acquisitions and divestitures:
Trade and other receivables	(1,321)	86,004
Contract assets	(4,426)	(63,391)
Inventories	(9,354)	(33,330)
Prepaid expenses and other current assets	(3,633)	549
Accounts payable, accrued expenses, and contract liabilities	(128,922)	(184,114)
Accrued pension and other postretirement benefits	(13,713)	(5,054)
Other, net	(279)	(665)
Net cash used in operating activities	(149,514)	(197,533)
Investing Activities
Capital expenditures	(2,112)	(7,723)
Proceeds from sale of assets and businesses	180,478	792
Purchase of facility related to divested businesses	(21,550)
Net cash provided by (used in) investing activities	156,816	(6,931)
Financing Activities
Net (decrease) increase in revolving credit facility		(225,000)
Proceeds from issuance of long-term debt		6,300
Retirement of debt and finance lease obligations	(350,688)	(27,468)
Payment of deferred financing costs		(4,277)
Premium on redemption of first lien notes	(7,489)
Repurchase of shares for share-based compensation minimum tax obligation	(2,336)	(474)
Net cash used in financing activities	(360,513)	(250,919)
Effect of exchange rate changes on cash	815	829
Net change in cash and cash equivalents	(352,396)	(454,554)
Cash and cash equivalents at beginning of period	589,882	485,463
Cash and cash equivalents at end of period	$ 237,486	$ 30,909