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Contingencies - Summary of Current Contingencies and Non-current Contingencies (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Liability, Defined Benefit Plan [Abstract]    
Current contingencies $ 5,633 $ 5,016
Non-current contingencies 7,629 2,527
Total contingencies $ 13,262 $ 7,542