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Employee Benefit Plans - Schedule of amounts contributed to defined contribution plans in various jurisdictions (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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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

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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