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EMPLOYEE STOCK COMPENSATION - Summary of SARs Activity (Details) - Stock appreciation rights - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Number of Shares        
Outstanding at beginning of period (in shares) 1,559,459 1,561,681 1,561,681  
Granted (in shares) 0   0  
Exercised (in shares) 0   0  
Forfeited (in shares) (219)   (2,441)  
Outstanding at end of period (in shares) 1,559,240 1,559,459 1,559,240 1,561,681
Exercisable at end of period (in shares) 1,549,874   1,549,874  
Weighted- Average Exercise Price per Share        
Outstanding at beginning of period (in dollars per share) $ 11.60 $ 11.60 $ 11.60  
Granted (in dollars per share) 0.00   0.00  
Exercised (in dollars per share) 0.00   0.00  
Forfeited (in dollars per share) 10.09   10.09  
Outstanding at end of period (in dollars per share) 11.60 $ 11.60 11.60 $ 11.60
Exercisable at end of period (in dollars per share) $ 11.61   $ 11.61  
Weighted- Average Remaining Contract Term        
Outstanding 6 years 4 months 22 days 6 years 7 months 21 days 6 years 4 months 22 days 6 years 7 months 21 days
Forfeited 6 years 4 months 22 days   6 years 4 months 22 days  
Exercisable at end of period 6 years 4 months 22 days   6 years 4 months 22 days  
Aggregated Intrinsic Value        
Outstanding $ 10,132 $ 9,198 $ 10,132 $ 4,716
Granted    
Exercised    
Forfeited    
Exercisable at end of period $ 10,057   $ 10,057  
Number of Shares        
Outstanding at beginning of period (in shares) 10,839 25,963 25,963  
Granted (in shares) 0   0  
Vested (in shares) (1,254)   (14,156)  
Forfeited (in shares) (219)   (2,441)  
Outstanding at end of period (in shares) 9,366 10,839 9,366 25,963
Weighted Average Grant Date Fair Value Per Share        
Outstanding at beginning of period (in dollars per share) $ 10.09 $ 10.09 $ 10.09  
Granted (in dollars per share) 0.00   0.00  
Vested (in dollars per share) 10.09   10.09  
Forfeited (in dollars per share) 10.09   10.09  
Outstanding at end of period (in dollars per share) $ 10.09 $ 10.09 $ 10.09 $ 10.09