MORTGAGE BANKING ACTIVITIES - NOTIONAL AMOUNTS AND FV (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Mortgage servicing rights    
Derivative instruments expiration period 90 days  
Mortgage loans held for sale    
Information about derivatives and swaps    
Notional Amount, Assets $ 11,568 $ 3,993
Fair Value, Assets 11,662 4,083
Rate lock loan commitments    
Information about derivatives and swaps    
Notional Amount, Assets 19,521 21,580
Fair Value, Assets 299 306
Mandatory forward contracts    
Information about derivatives and swaps    
Notional Amount, Assets 25,618  
Fair Value, Assets $ 204  
Notional Amount, Liabilities   19,232
Fair Value, Liabilities   $ 25