CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss from continuing operations	$ (378,404)	$ (81,211)	$ (1,418,652)
Adjustments to reconcile net loss to net cash provided by operating activities
Non-cash interest expense (income)	5,227	(7,728)	(43,810)
Deferred financing fees related to repricing of long-term debt	1,079	0	0
Amortization of deferred financing fees	6,766	8,292	8,860
Impairment of goodwill and indefinite-lived asset	275,170	43,500	1,572,523
Depreciation and amortization	204,553	208,856	216,046
Change in fair value of warrant liability	(584)	(286)	(21,236)
Fair value adjustments related to contingent consideration	1,678	11,152	6,572
Deferred income taxes	(57,307)	(80,416)
Equity-based compensation of Karman Topco L.P.	723	(2,524)	(6,934)
Stock-based compensation	31,019	38,933	35,101
Income from equity method investments	(2,064)
Distribution received from equity method investments	3,289	2,100	1,826
Gain on deconsolidation of subsidiaries	0	(58,891)	0
Gain on repurchases of Senior Secured Notes and Term Loan Facility debt	(9,141)	(8,665)	0
Loss on disposal of property and equipment	1,274	3,318	644
Loss on divestiture	0	0	2,863
Changes in operating assets and liabilities, net of effects from divestitures:
Accounts receivable, net	51,154	38,899	(85,737)
Prepaid expenses and other assets	28,396	100,841	15,051
Accounts payable	(12,918)	(23,066)	(14,164)
Accrued compensation and benefits	(30,380)	27,458	17,854
Deferred revenues	(2,129)	8,551	(10,930)
Other accrued expenses and other liabilities	(24,306)	4,890	30,191
Net cash provided by operating activities	93,095	228,492	104,705
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of businesses, net of cash acquired	0	0	(74,206)
Purchase of investments in unconsolidated affiliates	(13,932)	(3,023)	(775)
Purchase of property and equipment	(7,838)	(20,691)	(12,351)
Purchase of capitalized software	(47,501)	(20,872)	(20,664)
Proceeds from divestitures, net of cash	275,717	21,108	1,896
Deconsolidation of subsidiaries cash and cash equivalents and restricted cash, net of proceeds	0	(31,465)	0
Proceeds from sale of investments in unconsolidated affiliates	0	4,428	0
Net cash provided by (used in) investing activities	206,446	(50,515)	(106,100)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings under lines of credit	0	99,538	326,090
Payments on lines of credit	0	(99,102)	(326,968)
Principal payments on long-term debt	(13,131)	(13,294)	(13,293)
Repurchases of Senior Secured Notes and Term Loan Facility debt	(147,122)	(156,559)	0
Debt issuance costs	(971)	0	0
Proceeds from issuance of common stock	2,294	2,248	3,320
Payments for taxes related to net share settlement under 2020 Incentive Award Plan	(12,765)	(1,880)	0
Contingent consideration payments	(5,655)	(1,867)	(13,002)
Holdback payments	0	(944)	(11,057)
Financing fees paid	0	0	(1,464)
Contribution from noncontrolling interest	0	0	5,217
Redemption of noncontrolling interest	0	(154)	(224)
Purchase of treasury stock	(34,067)	(6,382)	0
Net cash used in financing activities	(211,417)	(178,396)	(31,381)
Net effect of foreign currency changes on cash, cash equivalents and restricted cash	(4,575)	1,800	(7,872)
Net change in cash, cash equivalents and restricted cash	83,549	1,381	(40,648)
Cash, cash equivalents and restricted cash, beginning of period	137,202	135,821	176,469
Cash, cash equivalents and restricted cash, end of period	$ 220,751	$ 137,202	$ 135,821