LOANS - TDRs by portfolio - restructured and subsequently defaulted (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
loan
Dec. 31, 2015
USD ($)
loan
Troubled debt restructurings:    
Number of loans | loan 8 1
Pre-modification outstanding balance $ 11,098 $ 58
Post-modification outstanding balance $ 10,956 $ 58
Troubled debt restructurings that subsequently defaulted    
Number of loans | loan 1,000 1
Recorded balance $ 28 $ 54
Commercial | Commercial loan portfolio    
Troubled debt restructurings:    
Number of loans | loan 3  
Pre-modification outstanding balance $ 685  
Post-modification outstanding balance $ 611  
Non residential real estate | Commercial loan portfolio    
Troubled debt restructurings:    
Number of loans | loan 2 1
Pre-modification outstanding balance $ 10,207 $ 58
Post-modification outstanding balance $ 10,139 $ 58
Troubled debt restructurings that subsequently defaulted    
Number of loans | loan 1,000 1
Recorded balance $ 28 $ 54
Residential real estate | Other loan portfolio    
Troubled debt restructurings:    
Number of loans | loan 3  
Pre-modification outstanding balance $ 206  
Post-modification outstanding balance $ 206