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Deposits - Scheduled Maturities of Time Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Banking and Thrift [Abstract]    
2019 $ 67,674  
2020 22,259  
2021 13,129  
2022 6,865  
2023 9,176  
Thereafter 116  
Time deposits $ 119,219 $ 122,651