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Commitments and Contingencies - Summary of Balance Sheet Classification of Operating Lease Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]    
Current portion of lease liabilities (included in other current liabilities) $ 2,889 $ 3,247
Long-term portion of lease liabilities 34,929 34,789
Total operating lease liabilities $ 37,818 $ 38,036