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Commitments and Contingencies - Summary of Operating Lease Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Commitments And Contingencies Disclosure [Abstract]        
Operating lease expense $ 1,535 $ 1,550 $ 4,665 $ 4,703