Consolidated Statements of Operations and Other Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues:
Revenues before reimbursable expenses	$ 402,505	$ 371,654	$ 798,195	$ 727,615
Reimbursable expenses	9,250	9,363	17,701	16,787
Total revenues	411,755	381,017	815,896	744,402
Operating expenses:
Direct costs (exclusive of depreciation and amortization included below)	269,028	248,605	547,071	501,908
Reimbursable expenses	9,250	9,427	17,695	17,011
Selling, general and administrative expenses	80,217	71,410	156,851	144,110
Other gains, net	71	15,917	71	14,349
Restructuring charges	560	2,056	1,898	4,393
Depreciation and amortization	7,117	6,033	14,066	12,005
Total operating expenses	366,101	321,614	737,510	665,078
Operating income	45,654	59,403	78,386	79,324
Other income (expense), net:
Interest expense, net of interest income	(9,281)	(7,954)	(14,928)	(13,094)
Other income (expense), net	(8,665)	646	(14,298)	3,425
Total other expense, net	(17,946)	(7,308)	(29,226)	(9,669)
Income before taxes	27,708	52,095	49,160	69,655
Income tax expense	8,278	14,613	5,194	14,167
Net income	$ 19,430	$ 37,482	$ 43,966	$ 55,488
Earnings per share:
Net income per basic share	$ 1.12	$ 2.10	$ 2.50	$ 3.08
Net income per diluted share	$ 1.09	$ 2.03	$ 2.42	$ 2.96
Weighted average shares used in calculating earnings per share:
Basic	17,320	17,887	17,569	18,042
Diluted	17,772	18,454	18,137	18,741
Comprehensive income (loss):
Net income (loss)	$ 19,430	$ 37,482	$ 43,966	$ 55,488
Foreign currency translation adjustments, net of tax	2,749	(281)	3,284	(1,003)
Unrealized loss on investment, net of tax	(5,249)	(6,318)	(15,766)	(7,765)
Unrealized loss on cash flow hedging instruments, net of tax	(2,114)	(1,127)	(4,347)	(54)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Total	(4,614)	(7,726)	(16,829)	(8,822)
Comprehensive income	$ 14,816	$ 29,756	$ 27,137	$ 46,666