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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
Mar. 31, 2017
Dec. 31, 2016
Amortized Cost    
Due in one year or less $ 15  
Due after one year through five years 8,641  
Due after five years through ten years 75,809  
Due after ten years 106,297  
MBSs and CMOs 232,937  
Total debt securities 423,699  
Equity securities 50  
Totals 423,749 $ 401,919
Fair Value    
Due in one year or less 15  
Due after one year through five years 8,797  
Due after five years through ten years 76,742  
Due after ten years 106,813  
MBSs and CMOs 231,132  
Total debt securities 423,499  
Equity securities 102  
Totals $ 423,601 $ 400,154