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STOCK PLANS AND STOCK BASED COMPENSATION - Restricted Stock Awards (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Jun. 30, 2016
Mar. 31, 2016
Stock-based compensation      
Shares of common stock granted   17,976 358,000
Closing price of common stock (in dollars per share)   $ 21.89 $ 19.89
Shares      
Granted (in shares)   17,976 358,000
Additional disclosures      
Compensation expense $ 100   $ 89
Restricted stock      
Stock-based compensation      
Shares of common stock granted 12,802    
Shares      
Nonvested at the beginning of the period (in shares) 104,319    
Granted (in shares) 12,802    
Vested (in shares) (18,322)    
Nonvested at the end of the period (in shares) 98,799    
Weighted Average Grant Date Fair Value      
Nonvested at the beginning of the period (in dollars per share) $ 20.03    
Granted (in dollars per share) 34.99    
Vested (in dollars per share) 16.13    
Nonvested at the end of the period (in dollars per share) $ 22.69    
Restricted stock | 2007 Stock Incentive Plan      
Additional disclosures      
Unrecognized compensation costs $ 1,382    
Weighted-average period of expected recognition of the cost 2 years 4 months 24 days    
Compensation expense $ 202   $ 149
Restricted stock | Executive officer and other employees      
Stock-based compensation      
Shares of common stock granted 12,802   24,152
Vesting percentage of stock awards on third anniversary of grant date 100.00%    
Shares      
Granted (in shares) 12,802   24,152
Weighted Average Grant Date Fair Value      
Granted (in dollars per share) $ 34.99   $ 21.47
Performance units | Executive officers      
Stock-based compensation      
Shares of common stock granted 6,528   16,152
Shares      
Granted (in shares) 6,528   16,152
Weighted Average Grant Date Fair Value      
Granted (in dollars per share) $ 35.04   $ 21.41
Additional disclosures      
Unrecognized compensation costs $ 524    
Compensation expense $ 49   $ 26