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SECURITIES - Securities pledged (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Financial Instruments Owned and Pledged as Collateral [Line Items]    
Fair value of securities pledged to secure public funds on deposit or for other purposes $ 191,000 $ 196,100
Securities pledged to secure securities sold under agreements to repurchase [Abstract]    
Amortized Cost 39,000 43,441
Fair Value 38,276 43,856
Equity method investments 400 500
Obligations of U.S. Government and U.S. Government sponsored enterprises    
Securities pledged to secure securities sold under agreements to repurchase [Abstract]    
Amortized Cost 1,231 22,988
Fair Value 1,276 23,267
Mortgage-backed securities, residential    
Securities pledged to secure securities sold under agreements to repurchase [Abstract]    
Amortized Cost 37,769 20,453
Fair Value $ 37,000 $ 20,589