CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (49,868)	$ (77,507)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization of long-lived assets	8,239	13,842
Amortization of deferred financing costs, debt discount and payment-in-kind interest	14,785	23,115
Amortization of guaranty fee	236	0
Non-cash operating lease expense	2,403	2,861
Loss on sale of business	108	3,601
Loss on debt extinguishment	6,194	3,969
(Gains) losses on asset disposals and impairments	(913)	42
Benefit from deferred income taxes, including valuation allowances	(793)	(776)
Mark to market (gains) losses and prior service cost amortization for pension and postretirement plans	(492)	390
Stock-based compensation, net of associated income taxes	1,803	609
Changes in assets and liabilities:
Accounts receivable	36,105	(5,765)
Contracts in progress	6,847	(8,384)
Advance billings on contracts	(14,957)	(45,187)
Inventories	(570)	(3,951)
Income taxes	(3,141)	1,295
Accounts payable	(37,347)	(31,688)
Accrued and other current liabilities	15,277	(15,670)
Accrued contract loss	(4,432)	(45,779)
Pension liabilities, accrued postretirement benefits and employee benefits	(16,946)	(110)
Other, net	(11,860)	(7,918)
Net cash used in operating activities	(49,322)	(193,011)
Cash flows from investing activities:
Purchase of property, plant and equipment	(1,675)	(434)
Proceeds from sale of business	8,000	7,445
Purchases of available-for-sale securities	(13,668)	(4,187)
Sales and maturities of available-for-sale securities	10,835	2,880
Other, net	773	(462)
Net cash from investing activities	4,265	5,242
Cash flows from financing activities:
Shares of our common stock returned to treasury stock	(10)	(23)
Costs related to rights offering	0	(682)
Debt issuance costs	(10,356)	(14,400)
Other, net	326	0
Net cash from financing activities	35,660	175,140
Effects of exchange rate changes on cash	572	(3,280)
Net decrease in cash, cash equivalents and restricted cash	(8,825)	(15,909)
Cash, cash equivalents and restricted cash, beginning of period	56,941	60,279
Cash, cash equivalents and restricted cash, end of period	48,116	44,370
U.S. Revolving Credit Facility
Cash flows from financing activities:
Borrowings under credit facilities	94,200	179,700
Repayments of lines of credit	(108,500)	(140,200)
Last Out Term Loan Tranche A-2
Cash flows from financing activities:
Borrowings under credit facilities	0	10,000
Last Out Term Loan Tranche A-3
Cash flows from financing activities:
Borrowings under credit facilities	0	141,350
Last Out Term Loan Tranche A-4 And Tranche A-6
Cash flows from financing activities:
Borrowings under credit facilities	60,000	0
Foreign Revolvers
Cash flows from financing activities:
Repayments of lines of credit	$ 0	$ (605)