Employee Benefit Plans - Schedule of amounts contributed to defined contribution plans in various jurisdictions (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	$ 36,830	$ 34,881	$ 73,764	$ 71,490
India
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	15,534	13,644	29,876	26,488
U.S.
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	4,583	5,055	10,101	11,151
U.K.
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	4,482	4,084	9,065	10,019
China
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	7,372	6,970	14,770	14,310
Other Regions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	$ 4,859	$ 5,128	$ 9,952	$ 9,522