CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (10,181)	$ (88,058)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	26,486	26,510
Deferred income taxes	(962)	(4,253)
Income from discontinued operations	(327)	(286)
Restructuring charges	2,080	3,613
Impairment charges	583	0
Gains on dispositions of property and other assets	(154)	(9,360)
Share-based compensation expense	5,469	4,216
Multi-employer pension plan withdrawal	0	57
Other non-cash items, net	5,384	(33)
Change in operating assets and liabilities:
Receivables	(67,166)	(7,056)
Inventories	(6,461)	(2,602)
Current contract costs	(11,946)	(4,372)
Accounts payable	32,942	6,456
Restructuring liabilities	(1,894)	(3,106)
Accrued compensation	12,586	7,145
Contract liabilities	27,167	27,770
Income taxes payable	(193)	160
Other assets and liabilities, net	30,605	3,650
Net cash provided by (used in) operating activities	44,018	(39,549)
Cash flows from investing activities
Capital expenditures	(31,639)	(24,763)
Cash paid for acquisitions, net	(25,494)	(7,606)
Proceeds from dispositions of property and other assets	161	14,227
Net cash used in investing activities	(56,972)	(18,142)
Cash flows from financing activities
Proceeds from borrowings	54,668	65,608
Payments on debt and finance lease obligations	(38,728)	(9,027)
Dividends paid on preferred stock	(3,900)	0
Distributions to noncontrolling interest, net of contributions from noncontrolling interest	(570)	(678)
Payments of debt issuance costs	(418)	(128)
Payment of payroll taxes on stock-based compensation through shares withheld or repurchased	(537)	(601)
Net cash provided by financing activities	10,515	55,174
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(1,924)	538
Net change in cash, cash equivalents, and restricted cash	(4,363)	(1,979)
Cash, cash equivalents, and restricted cash, beginning of year	64,303	41,971
Cash, cash equivalents, and restricted cash, end of period	$ 59,940	$ 39,992