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SECURITIES, By Contractual Maturity (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Amortized cost of available-for-sale securities by contractual maturity [Abstract]    
Due in one year or less $ 8,669  
Due after one year through five years 10,820  
Due after five years through ten years 2,496  
Mortgage-backed securities of government sponsored agencies 302,278  
Available for sale, Amortized Cost 324,263 $ 281,090
Fair value of available-for-sale securities by contractual maturity [Abstract]    
Due in one year or less 8,644  
Due after one year through five years 10,658  
Due after five years through ten years 2,386  
Mortgage backed securities of government sponsored agencies 293,537  
Available for sale, Fair Value $ 315,225 $ 278,466