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Leases - Summary of Balance Sheet Classification of Lease Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Leases [Abstract]    
Current portion of lease liabilities $ 8,150 $ 5,087
Operating Lease Liability Current Statement Of Financial Position Extensible List us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Operating lease liabilities $ 57,677 $ 44,460
Total operating lease liabilities $ 65,827 $ 49,547