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SECURITIES AVAILABLE FOR SALE - Summary of Amortized Cost and Fair Value by Contractual Maturity (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Amortized Cost    
Due in one year or less $ 15  
Due after one year through five years 7,157  
Due after five years through ten years 72,205  
Due after ten years 123,869  
Mortgage-backed securities and CMOs 198,623  
Total debt securities 401,869  
Equity securities 50  
Totals 401,919 $ 392,279
Fair Value    
Due in one year or less 15  
Due after one year through five years 7,258  
Due after five years through ten years 72,817  
Due after ten years 123,784  
Mortgage-backed securities and CMOs 196,189  
Total debt securities 400,063  
Equity securities 91  
Totals $ 400,154 $ 394,124