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STOCK-BASED COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Weighted Average Grant Price [Roll Forward]      
Stock compensation expense $ 2,304 $ 2,654  
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting rights The shares of restricted stock granted to employees and that are outstanding as of September 30, 2015 vest in accordance with one of the following vesting schedules: 100% one year after date of grant; 33.3% each year for three years after date of grant; 20% each year for five years after the grant date; or 10% each year for ten years after the grant date.    
Percentages of vesting for one year 100.00%    
Percentages of vesting for three years 33.30%    
Percentages of vesting for five years 20.00%    
Percentages of vesting for ten years 10.00%    
Numerator used for calculating the number of whole shares granted $ 75    
Award vesting period 1 year    
Number of shares granted (in shares) (24,971)    
Number of shares forfeited (in shares) 10,118    
Restricted Stock [Roll Forward]      
Non-vested, beginning balance (in shares) 179,942    
Granted (in shares) 24,971    
Forfeited (in shares) (10,118)    
Vested (in shares) (58,138)    
Non-vested, ending balance (in shares) 136,657    
Weighted Average Grant Price [Roll Forward]      
Non-vested, beginning balance (in dollars per share) $ 52.71    
Granted (in dollars per share) 40.95    
Forfeitures (in dollars per share) 57.66    
Vested (in dollars per share) 45.36    
Non-vested, ending balance (in dollars per share) $ 53.32    
Stock compensation expense $ 2,300 $ 2,700  
Related income tax benefits recognized 1,100    
Unrecognized compensation expense $ 5,700   $ 8,000
Compensation cost not yet recognized, Period for recognition 25 months 12 days    
Restricted Stock Plan [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized for grants (in shares) 800,000    
Number of shares granted (in shares) (862,349)    
Number of shares forfeited (in shares) 133,139    
Number of shares available for future grants (in shares) 70,790    
Restricted Stock [Roll Forward]      
Granted (in shares) 862,349    
Forfeited (in shares) (133,139)    
Weighted Average Grant Price [Roll Forward]      
Granted (in dollars per share) $ 28.21