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SECURITIES AVAILABLE FOR SALE - Schedule of Amortized Cost and Fair Values of Securities Available for Sale by Contractual Maturity (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Amortized Cost    
Due in one year or less $ 15  
Due after one year through five years 11,734  
Due after five years through ten years 59,744  
Due after ten years 95,003  
MBSs and CMOs 225,612  
Asset-backed 5,418  
Total debt securities 397,526  
Equity securities 50  
Totals 397,576 $ 401,919
Fair Value    
Due in one year or less 15  
Due after one year through five years 11,990  
Due after five years through ten years 61,267  
Due after ten years 97,493  
MBSs and CMOs 225,610  
Total debt securities 401,793  
Equity securities 111  
Totals $ 401,904 $ 400,154