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Accrued expenses and other current liabilities - Schedule of accrued expenses and other current liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Accrued Liabilities and Other Liabilities [Abstract] |  |
Accrued expenses | $ 162,054 | $ 150,390
Accrued employee cost | 307,777 | 286,399
Earn-out consideration | 2,501 | 2,651
Statutory liabilities | 67,948 | 104,768
Retirement benefits | 1,746 | 1,967
Compensated absences | 26,596 | 28,635
Derivative instruments | 12,498 | 20,172
Contract liabilities | 160,602 | 154,717
Finance lease liability | 18,549 | 18,066
Others | 31,169 | 39,004
Accrued expenses and other current liabilities, net | $ 791,440 | $ 806,769
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Accrued expenses and other current liabilities, net | Accrued expenses and other current liabilities, net

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 + Details
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