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Employee benefit plans - Schedule of Defined Contribution Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	$ 38,861	$ 34,722	$ 112,625	$ 106,212
India
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	15,623	14,029	45,499	40,517
U.S.
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	4,463	4,664	14,564	15,815
U.K.
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	5,808	4,227	14,873	14,246
China
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	7,221	7,315	21,991	21,625
Other Regions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plans, contributed amount	$ 5,746	$ 4,487	$ 15,698	$ 14,009

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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

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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

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