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Prepaid expenses and other current assets - Schedule of prepaid expenses and other current assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Advance income and non-income taxes	$ 106,192	$ 73,008
Contract asset	9,942	9,035
Prepaid expenses	40,738	32,375
Derivative instruments	12,900	21,545
Employee advances	4,259	2,636
Deposits	5,169	8,774
Advances to suppliers	1,000	2,716
Others	21,398	37,319
Prepaid expenses and other current assets, net	$ 201,598	$ 187,408

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