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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Apr. 18, 2018
Mar. 31, 2018
Mar. 31, 2017
Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items]        
Number of shares authorized to be repurchased (in shares)       416,000
Acquisition of treasury stock (in shares)   82,725    
Acquisition of treasury stock   $ 1,438    
Acquisition of treasury stock (in usd per share)   $ 17.38    
Dividends declared per share (in usd per share)   $ 0.12 $ 0.10  
Subsequent Event        
Equity, Class of Treasury Stock [Line Items]        
Dividends declared per share (in usd per share) $ 0.13      
Maximum        
Equity, Class of Treasury Stock [Line Items]        
Stock repurchase program authorized, maximum percentage of outstanding shares of common stock       5.00%