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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
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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 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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