Segment and Geographical Information - Revenues and Cost of Revenues for Company's Reportable Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		$ 1,838,372	$ 1,630,668	$ 1,412,044
Cost of revenues
Employee costs		947,541	840,962	728,349
Infrastructure and technology costs		126,859	105,473	94,911
Other costs		72,959	76,467	73,335
Gross profit	[1]	691,013	607,766	515,449
Operating expenses		427,393	369,011	323,287
Foreign exchange gain, net, interest expense and other income, net		(2,273)	(814)	(2,063)
Income tax expense		62,936	53,536	47,565
(Loss) Gain from equity-method investment		(114)	153	434
Net income		198,297	184,558	142,968
Digital operations and solutions
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		1,042,174	901,541	764,693
Analytics services
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		796,198	729,127	647,351
Insurance
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		614,028	529,855	448,704
Cost of revenues
Employee costs		320,335	281,108	236,963
Infrastructure and technology costs		58,415	49,633	41,126
Other costs		11,600	11,044	9,645
Gross profit		223,678	188,070	160,970
Restructuring costs		607
Healthcare
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		116,406	105,994	97,351
Cost of revenues
Employee costs		63,597	56,026	55,532
Infrastructure and technology costs		11,049	9,872	11,889
Other costs		3,288	3,375	3,530
Gross profit		38,472	36,721	26,400
Restructuring costs		16
Emerging Business
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		311,740	265,692	218,638
Cost of revenues
Employee costs		147,316	121,278	101,978
Infrastructure and technology costs		29,813	25,922	22,556
Other costs		4,278	3,743	3,483
Gross profit		130,333	114,749	90,621
Restructuring costs		73
Analytics
Revenues and cost of revenues for Company's reportable segments [Line Items]
Revenues, net		796,198	729,127	647,351
Cost of revenues
Employee costs		416,293	382,550	333,876
Infrastructure and technology costs		27,582	20,046	19,340
Other costs		53,793	58,305	56,677
Gross profit		298,530	$ 268,226	$ 237,458
Restructuring costs		$ 2,382

[1] Exclusive of depreciation and amortization expense.