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STOCK-BASED COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Additional disclosures        
Compensation expense, net of forfeitures     $ 954 $ 974
Restricted Stock        
STOCK-BASED COMPENSATION        
Weighted average value (in dollars per share)     $ 22.54  
Service period over which value of the shares is amortized to compensation expense     3 years  
Number of Nonvested Restricted Shares        
Outstanding at beginning of period (in shares)     308,542  
Awarded (in shares)     104,235  
Vested (in shares)     (117,915)  
Forfeited (in shares)     (15,782)  
Outstanding at end of period (in shares) 279,080   279,080  
Additional disclosures        
Compensation expense, net of forfeitures $ 488 $ 461 $ 954 $ 974
Restricted Stock | Performance based vesting        
Number of Nonvested Restricted Shares        
Awarded (in shares)     28,025