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Goodwill and Other Intangible Assets - Estimated Amortization Expense in Future Years (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
2021 $ 10,167  
2022 3,998  
Net Carrying Amount $ 14,165 $ 29,034