CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 21,210	$ 5,208
Adjustments to reconcile net income to net cash provided by operating activities
Noncash interest expense, net	(22,136)	419
Depreciation and amortization	116,212	122,287
Change in fair value of warrant liability	(20,356)	(1,533)
Fair value adjustments related to contingent consideration	5,788	3,361
Deferred income taxes	(11,648)	(7,403)
Equity-based compensation of Karman Topco L.P.	(6,314)	(7,110)
Stock-based compensation	22,732	20,204
Equity in earnings of unconsolidated affiliates	(4,687)	(3,260)
Distribution received from unconsolidated affiliates	1,143	1,154
Loss on disposal of property and equipment	0	6,199
Loss on divestiture	2,850	0
Changes in operating assets and liabilities, net of effects from purchases of businesses:
Accounts receivable, net	(11,053)	(64,802)
Prepaid expenses and other assets	(42,580)	(3,447)
Accounts payable	(26,485)	8,901
Accrued compensation and benefits	(9,260)	(23,224)
Deferred revenues	(539)	1,717
Other accrued expenses and other liabilities	15,115	(2,747)
Net cash provided by operating activities	29,992	55,924
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of businesses, net of cash acquired	(67,611)	(20,426)
Purchase of property and equipment	(21,533)	(12,958)
Net cash used in investing activities	(89,144)	(33,384)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings under lines of credit	67,134	41,736
Payments on lines of credit	(22,034)	(92,756)
Proceeds from issuance of long-term debt	278	0
Principal payments on long-term debt	(6,653)	(6,849)
Proceeds from issuance of common stock	1,653	0
Contingent consideration payments	(20,882)	(6,247)
Holdback payments	(715)	(173)
Redemption of noncontrolling interest	0	(200)
Net cash provided by (used in) financing activities	18,781	(64,489)
Net effect of foreign currency changes on cash	(6,603)	(855)
Net change in cash, cash equivalents and restricted cash	(46,974)	(42,804)
Cash, cash equivalents and restricted cash, beginning of period	180,637	219,966
Cash, cash equivalents and restricted cash, end of period	133,663	177,162
SUPPLEMENTAL CASH FLOW INFORMATION
Purchase of property and equipment recorded in accounts payable and accrued expenses	$ 311	$ 628