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Goodwill and Intangible Assets, Net - Summary of Expected Future Amortization Expenses by Year Related to the Intangible Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 (Remainder) $ 2,867  
2022 11,365  
2023 11,291  
2024 10,590  
2025 9,110  
Thereafter 5,612  
Net Book Value $ 50,835 $ 4,047