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Deposits - Schedule of Maturities of Time Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Banking and Thrift [Abstract]    
Due in 2020 $ 29,975  
Due in 2021 324,217  
Due in 2022 102,353  
Due in 2023 53,132  
Due in 2024 71,177  
Thereafter 25,156  
Time deposits $ 606,010 $ 670,077