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DEPOSITS - Summary of Composition of Deposits (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Banking and Thrift [Abstract]    
Noninterest-bearing $ 204,843 $ 162,343
NOW and money market 856,520 687,936
Savings 113,515 95,148
Time ($250,000 or less) 343,551 252,200
Time (over $250,000) 40,327  
Total deposits $ 1,558,756 $ 1,219,515