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Goodwill and Other Intangible Assets - Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Estimated Amortization Expense    
2021 $ 5,874  
2022 5,419  
2023 5,229  
2024 4,339  
2025 3,255  
Thereafter 25,296  
Net Carrying Amount $ 49,412 $ 16,772