CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income (loss)	$ 23,452	$ 24,795	$ (92,735)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	51,043	52,483	53,750
Deferred income taxes	(1,609)	1,820	6,012
(Income) loss from discontinued operations	822	(148)	(558)
Restructuring charges	1,174	3,059	6,066
Impairment charges	0	583	0
Gains on dispositions of property and other assets	(98)	(272)	(9,374)
Gain on sale of ON Services	204	(19,637)	0
Share-based compensation expense	11,452	10,241	7,727
Multi-employer pension plan withdrawal	0	0	57
Other non-cash items, net	6,605	12,843	5,318
Change in operating assets and liabilities (excluding the impact of acquisitions and disposition):
Receivables	(5,520)	(39,402)	(75,450)
Inventories	781	(2,587)	129
Current contract costs	(5,676)	(4,651)	(3,284)
Accounts payable	556	7,756	46,694
Restructuring liabilities	(1,450)	(2,735)	(5,923)
Accrued compensation	3,347	11,321	4,221
Contract liabilities	8,406	5,607	20,881
Income taxes payable	461	7,147	1,003
Other assets and liabilities, net	10,728	5,208	(2,386)
Net cash provided by (used in) operating activities	104,678	73,431	(37,852)
Cash flows from investing activities
Capital expenditures	(76,089)	(67,170)	(57,936)
Cash paid for acquisitions, net	(41)	(25,494)	(8,227)
Proceeds from sale of ON Services	1,168	28,926	0
Proceeds from dispositions of property and other assets	107	470	14,360
Net cash used in investing activities	(74,855)	(63,268)	(51,803)
Cash flows from financing activities
Proceeds from borrowings	162,049	107,580	461,322
Payments on debt and finance obligations	(184,537)	(103,491)	(345,297)
Dividends paid on preferred stock	(7,801)	(7,801)	(3,900)
Distributions to noncontrolling interest, net of contributions from noncontrolling interest	(2,726)	(570)	(843)
Payments of debt issuance costs	(1,667)	(418)	(1,767)
Payment of payroll taxes on stock-based compensation through shares withheld or repurchased	(1,482)	(1,428)	(1,626)
Net cash (used in) provided by financing activities	(36,164)	(6,128)	107,889
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	806	(3,774)	4,098
Net change in cash, cash equivalents, and restricted cash	(5,535)	261	22,332
Cash, cash equivalents, and restricted cash, beginning of year	64,564	64,303	41,971
Cash, cash equivalents, and restricted cash, end of year	$ 59,029	$ 64,564	$ 64,303