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Deposits - Summary of Time Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Banking and Thrift [Abstract]    
2016 $ 138,427  
2017 34,446  
2018 23,779  
2019 37,557  
2020 20,216  
Thereafter 998  
Total time deposits $ 255,423 $ 207,218