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Intangible Assets - Summary of Total Estimated Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
Remaining three months of 2021 $ 4,952  
2022 15,332  
2023 6,040  
2024 2,002  
2025 482  
2026 and thereafter 124  
Total $ 28,932 $ 28,591