CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net loss	$ (724,857)	$ (379,015)	$ (115,082)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization of long-lived assets	32,003	40,138	39,583
Amortization of deferred financing costs, debt discount and payment-in-kind interest	25,727	6,407	1,244
Gain on sale of business, net	(33,919)	(1,064)	0
Loss on debt extinguishment	49,241	0	0
Goodwill impairment of discontinued operations	72,309	0	0
Goodwill and other intangible asset impairment	40,046	86,903	0
Income from equity method investees	(6,758)	(8,326)	(16,440)
Other-than-temporary impairment of equity method investment in TBWES	18,362	18,193	0
Losses on asset disposals and impairments	1,313	1,871	14,938
Provision for (benefit from) deferred income taxes, including valuation allowances	98,060	50,304	(9,000)
Mark to market losses (gains) and prior service cost amortization for pension and postretirement plans	63,511	(11,608)	36,346
Stock-based compensation, net of associated income taxes	2,254	11,813	16,129
Changes in assets and liabilities:
Accounts receivable	80,376	9,414	46,755
Dividends from equity method investees	890	50,134	12,160
Accrued insurance receivable	12,300	0	(15,000)
Contracts in progress and advance billings on contracts	(28,644)	(24,001)	(13,259)
Inventories	10,337	11,874	2,869
Income taxes	(5,342)	26,618	22,593
Accounts payable	(4,360)	(14,664)	4,542
Accrued and other current liabilities	38,734	(30,049)	5,959
Accrued contract losses	61,651	40,634
Pension liabilities, accrued postretirement benefits and employee benefits	(38,976)	(44,584)	(46,973)
Other, net	(6,023)	(7,790)	(4,242)
Net cash from operating activities	(281,885)	(189,833)	2,273
Cash flows from investing activities:
Purchase of property, plant and equipment	(5,473)	(14,278)	(22,450)
Acquisition of business, net of cash acquired	0	(52,547)	(144,780)
Proceeds from sale of businesses, net of cash sold	155,016	0	0
Proceeds from sale of equity method investments in joint ventures	28,764	0	17,995
Investment in equity method investee	0	0	(26,256)
Purchases of available-for-sale securities	(34,836)	(29,252)	(45,217)
Sales and maturities of available-for-sale securities	35,220	31,435	29,846
Other, net	534	708	646
Net cash from investing activities	179,225	(63,934)	(190,216)
Cash flows from financing activities:
Common stock repurchase from related party	0	(16,674)	0
Proceeds from rights offering	247,132	0	0
Costs related to rights offering	(3,286)	0	0
Debt issuance costs	(22,360)	(15,002)	0
Issuance of common stock	1,243	0	0
Shares of our common stock returned to treasury stock	(805)	(967)	(78,410)
Other, net	0	(1,082)	(246)
Net cash from financing activities	82,612	206,125	(83,430)
Effects of exchange rate changes on cash	(2,320)	6,632	(7,306)
Net decrease in cash, cash equivalents and restricted cash	(22,368)	(41,010)	(278,679)
Less net increase (decrease) in cash and cash equivalents of discontinued operations	(12,950)	4,489	8,461
Net decrease in cash, cash equivalents and restricted cash of continuing operations	(9,418)	(45,499)	(287,140)
Cash, cash equivalents and restricted cash of continuing operations, beginning of period	69,697	115,196	402,336
Cash, cash equivalents and restricted cash of continuing operations, end of period	60,279	69,697	115,196
Accounting Standards Update 2014-09
Changes in assets and liabilities:
Accrued contract losses	21,531	17,599	19,151
U.S. Revolving Credit Facility
Cash flows from financing activities:
Borrowings under credit facilities	565,200	629,722	205,600
Repayments of lines of credit	(514,600)	(545,222)	(195,800)
Last Out Term Loan - cash interest
Cash flows from financing activities:
Borrowings under our last out term loan from related party	30,000	0	0
Second Lien Term Loan Facility
Cash flows from financing activities:
Borrowings under credit facilities	0	161,674	0
Repayments of lines of credit	(212,590)	0	0
Foreign Revolvers
Cash flows from financing activities:
Borrowings under credit facilities	0	273	5,674
Repayments of lines of credit	$ (7,322)	$ (6,597)	$ (20,248)