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Segment Reporting - Schedule of net revenues from geographic areas based on location of service delivery centers (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Total net revenues $ 4,022,211 $ 3,709,377 $ 3,520,543
India      
Segment Reporting Information [Line Items]      
Total net revenues 2,022,123 1,851,347 1,890,897
Asia, other than India      
Segment Reporting Information [Line Items]      
Total net revenues 536,595 461,839 356,726
North and Latin America      
Segment Reporting Information [Line Items]      
Total net revenues 1,011,759 1,007,635 863,748
Europe      
Segment Reporting Information [Line Items]      
Total net revenues $ 451,734 $ 388,556 $ 409,172