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Employee benefit plans (Tables) | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Net Defined Benefit Plan Costs | Net defined benefit plan costs for the three and nine months ended September 30, 2024 and 2025 include the following components:
| Three months ended September 30, |  | Nine months ended September 30,
| 2024 |  | 2025 |  | 2024 |  | 2025
Service costs | $ | 4,274 |  |  | $ | 4,657 |  |  | $ | 12,891 |  |  | $ | 14,208 |
Interest costs | 1,994 |  | 2,170 |  |  | 6,028 |  |  | 6,523 |
Amortization of actuarial loss | 60 |  | 76 |  |  | 182 |  |  | 227 |
Expected return on plan assets | (1,351) |  |  | (1,710) |  |  | (4,069) |  |  | (5,160) |
Net defined benefit plan costs | $ | 4,977 |  |  | $ | 5,193 |  |  | $ | 15,032 |  |  | $ | 15,798 |
Schedule of Defined Contribution Plans | During the three and nine months ended September 30, 2024 and 2025, the Company contributed the following amounts to defined contribution plans in various jurisdictions:
| Three months ended September 30, |  | Nine months ended September 30,
| 2024 |  | 2025 |  | 2024 |  | 2025
India | $ | 14,029 |  |  | $ | 15,623 |  |  | $ | 40,517 |  |  | $ | 45,499 |
U.S. | 4,664 |  | 4,463 |  |  | 15,815 |  |  | 14,564 |
U.K. | 4,227 |  | 5,808 |  |  | 14,246 |  |  | 14,873 |
China | 7,315 |  | 7,221 |  |  | 21,625 |  |  | 21,991 |
Other Regions | 4,487 |  | 5,746 |  |  | 14,009 |  |  | 15,698 |
Total | $ | 34,722 |  |  | $ | 38,861 |  |  | $ | 106,212 |  |  | $ | 112,625 |

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- Definition Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 70 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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