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Deposits - Schedule of Maturities of Time Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Banking and Thrift, Other Disclosures [Abstract]    
Due in 2021 $ 12,178  
Due in 2022 304,928  
Due in 2023 93,332  
Due in 2024 115,886  
Due in 2025 24,000  
Thereafter 13,451  
Total $ 563,775 $ 606,010