Immaterial Financial Restatement to Prior Period Financial Statements - Statement of Operations and Comprehensive Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue from services	$ 309,940	$ 315,119	$ 339,771	$ 379,174	$ 414,035	$ 442,291	$ 540,695	$ 622,707	$ 1,344,004	$ 2,019,728	$ 2,803,381
Operating expenses:
Direct operating expenses									1,069,752	1,569,318	2,178,923
Selling, general and administrative expenses											324,935
Credit loss expense	(228)	1,512	18,858	1,290	4,166	2,355	3,134	4,908	21,432	14,562	9,609
Depreciation and amortization									18,200	18,347	12,576
Restructuring costs		1,000	2,100	900	900		900		4,333	2,553	1,861
Impairment charges									2,888	719	5,597
Total operating expenses									1,360,869	1,907,015	2,533,501
(Loss) income from operations									(16,865)	112,713	269,880
Other expenses (income):
Interest expense									2,188	8,094	14,391
Loss on early extinguishment of debt							1,700		0	1,723	3,728
Other income, net											(1,336)
(Loss) income before income taxes									(16,398)	102,894	253,097
Income tax expense									(1,842)	30,263	67,115
Net (loss) income attributable to common stockholders	$ (3,753)	$ 2,555	$ (16,050)	$ 2,692	$ 9,038	$ 12,812	$ 21,345	$ 29,436	(14,556)	72,631	185,982
Other comprehensive (loss) income:
Unrealized foreign currency translation (loss) income, net of tax									(56)	2	(94)
Comprehensive income (loss) attributable to common stockholders									$ (14,612)	$ 72,633	$ 185,888
Net (loss) income per share attributable to common stockholders - Basic (usd per share)	$ (0.12)	$ 0.08	$ (0.47)	$ 0.08	$ 0.26	$ 0.37	$ 0.60	$ 0.82	$ (0.44)	$ 2.07	$ 5.02
Net (loss) income per share attributable to common stockholders - Diluted (usd per share)	$ (0.12)	$ 0.08	$ (0.47)	$ 0.08	$ 0.26	$ 0.36	$ 0.60	$ 0.81	$ (0.44)	$ 2.05	$ 4.95
Weighted average common shares outstanding:
Basic (in shares)									33,379	35,158	37,012
Diluted (in shares)									33,379	35,476	37,536
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue from services											$ 2,806,609
Operating expenses:
Direct operating expenses											2,178,923
Selling, general and administrative expenses											324,935
Credit loss expense											9,609
Depreciation and amortization											12,576
Restructuring costs											1,861
Impairment charges											5,597
Total operating expenses											2,533,501
(Loss) income from operations											273,108
Other expenses (income):
Interest expense											14,391
Loss on early extinguishment of debt											3,728
Other income, net											(1,336)
(Loss) income before income taxes											256,325
Income tax expense											67,864
Net (loss) income attributable to common stockholders										$ 72,631	188,461
Other comprehensive (loss) income:
Unrealized foreign currency translation (loss) income, net of tax										$ 2	(94)
Comprehensive income (loss) attributable to common stockholders											$ 188,367
Net (loss) income per share attributable to common stockholders - Basic (usd per share)											$ 5.09
Net (loss) income per share attributable to common stockholders - Diluted (usd per share)											$ 5.02
Weighted average common shares outstanding:
Basic (in shares)											37,012
Diluted (in shares)											37,536
Revision of Prior Period, Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue from services											$ (3,228)
Operating expenses:
Direct operating expenses											0
Selling, general and administrative expenses											0
Credit loss expense											0
Depreciation and amortization											0
Restructuring costs											0
Impairment charges											0
Total operating expenses											0
(Loss) income from operations											(3,228)
Other expenses (income):
Interest expense											0
Loss on early extinguishment of debt											0
Other income, net											0
(Loss) income before income taxes											(3,228)
Income tax expense											(749)
Net (loss) income attributable to common stockholders											(2,479)
Other comprehensive (loss) income:
Unrealized foreign currency translation (loss) income, net of tax											0
Comprehensive income (loss) attributable to common stockholders											$ (2,479)
Net (loss) income per share attributable to common stockholders - Basic (usd per share)											$ (0.07)
Net (loss) income per share attributable to common stockholders - Diluted (usd per share)											$ (0.07)
Weighted average common shares outstanding:
Basic (in shares)											37,012
Diluted (in shares)											37,536