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Other Liabilities - Schedule of other liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Other Liabilities Disclosure [Abstract] |  |
Accrued employee cost | $ 22,154 | $ 19,797
Earn-out consideration | 3,105 | 5,621
Retirement benefits | 13,123 | 11,947
Compensated absences | 52,774 | 47,656
Derivative instruments | 7,514 | 20,809
Contract liabilities (Note 20) | 84,170 | 68,760
Finance lease liability | 20,407 | 30,958
Others | 44,495 | 32,850
Other Liabilities | $ 247,742 | $ 238,398
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other Liabilities | Other Liabilities

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