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 (loss) income	$ (116)	$ 19,410	$ (18,527)
Adjustments to reconcile net (loss) income net cash provided by operations
Loss on extinguishment of debt	0	3,673	0
Depreciation and amortization	62,853	73,140	82,064
Deferred income taxes	(13,875)	(3,344)	(21,996)
Stock-based compensation	34,650	23,805	32,580
Impairments and disposals of long-lived assets	7,371	1,008	3,274
Provision for bad debts	937	877	1,169
Amortization of financing fees	1,078	453	471
Amortization of debt discount	798	1,675	3,262
Deferred rent	(158)	(226)	(1,621)
Unrealized translation gain (loss) on investment in foreign subsidiaries	183	(2,345)	(154)
Changes in fair value of derivatives	0	(4,102)	(7,422)
Change in fair value of contingent consideration, net	(2,631)	0	0
Excess payment on contingent consideration for acquisition	0	0	(1,159)
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable	1,481	(11,184)	(40,086)
Insurance receivable	(2,015)	921	750
Prepaid expenses	4,852	(1,101)	(4,975)
Other assets	(94)	(4,515)	(3,181)
Accounts payable	111	7,885	12,950
Litigation settlement obligation	1,114	4,165	(750)
Accrued expenses	(4,610)	303	30,212
Other liabilities	4,932	(6,235)	1,744
Net cash provided by operations	96,861	104,263	68,605
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(2,560)	(4,498)	(3,234)
Purchases of intangible assets and capitalized software	(17,802)	(15,689)	(15,860)
Acquisitions, net of cash acquired	(49,210)	0	(66,323)
Proceeds from disposition of property and equipment	122	51	41
Net cash used in investing activities	(69,450)	(20,136)	(85,376)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of common stock	5,361	2,416	2,483
Repurchases of common stock	(67,762)	(13,962)	0
Proceeds from issuance of common stock in IPO, net of underwriting discounts and commissions	0	0	102,638
Payments of initial public offering issuance costs	0	(225)	(7,890)
Cash paid for tax withholding on vesting of restricted shares	(5,697)	0	0
Capital contribution from certain stockholders	0	0	15,576
Payments of long-term debt	(7,500)	(510,340)	(113,147)
Proceeds from term loan borrowings	0	300,000	0
Repayments of revolving credit facility	0	(17,495)	0
Borrowings on revolving credit facility	0	222,989	0
Payments of debt issuance costs	0	(9,093)	0
Payment of contingent consideration for acquisition	(305)	(226)	(738)
Payments of finance lease obligations	0	(3)	(9)
Net cash used in financing activities	(75,903)	(25,939)	(1,087)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	(379)	(3,091)	(777)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(48,871)	55,097	(18,635)
Beginning of period	103,095	47,998	66,633
Cash and cash equivalents at end of period	54,224	103,095	47,998
Cash and cash equivalents at end of period
Interest, net of capitalized amounts of $437, $378 and $322, respectively	37,729	32,348	30,782
Income taxes	17,484	18,532	5,574
Offering costs included in accounts payable and accrued liabilities	0	0	225
Noncash investing and financing activities
Purchases of property and equipment in accounts payable and accrued expenses	548	25	109
Unsettled share repurchases included in other liabilities	600	0	0
Unsettled employee stock options exercised included in other receivables	505	0	0
Noncash purchase price of business combinations	$ 4,706	$ 0	$ 1,445