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Employee Benefit Plans - Schedule of amounts contributed to defined contribution plans in various jurisdictions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	$ 119,382	$ 96,447	$ 95,744
India
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	37,508	30,396	29,729
U.S.
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	21,496	19,491	19,401
U.K.
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	19,874	18,643	19,260
China
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	24,988	16,436	18,816
Other Regions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	$ 15,516	$ 11,481	$ 8,538

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

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+ References

No definition available.

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