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Deposits - Scheduled Maturities of Time Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deposits [Abstract]    
2017 $ 60,894  
2018 24,587  
2019 14,505  
2020 14,678  
2021 12,289  
Thereafter 1,474  
Time deposits $ 128,427 $ 141,101