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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jul. 26, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items]            
Number of shares authorized to be repurchased           416,000
Acquisition of treasury stock (in shares)   82,725   82,725    
Acquisition of treasury stock   $ 1,438   $ 1,438    
Acquisition of treasury stock (in usd per share)       $ 17.38    
Dividends per share (usd per share)   $ 0.10 $ 0.09 $ 0.2 $ 0.17  
Subsequent Event            
Equity, Class of Treasury Stock [Line Items]            
Dividends per share (usd per share) $ 0.10          
Maximum            
Equity, Class of Treasury Stock [Line Items]            
Stock repurchase program authorized, maximum percentage of outstanding shares of common stock           5.00%