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STOCK-BASED COMPENSATION (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Weighted Average Grant Price [Roll Forward]        
Stock compensation expense   $ 2,654,000 $ 2,150,000  
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, 2014 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 (in hundredths)   100.00%    
Percentages of vesting for three years (in hundredths)   33.30%    
Percentages of vesting for five years (in hundredths)   20.00%    
Percentages of vesting for ten years (in hundredths)   10.00%    
Numerator used for calculating the number of whole shares granted   75,000    
Award vesting period   1 year    
Number of shares authorized for grants (in shares) 800,000 800,000    
Number of shares granted (in shares) (837,378) (52,219)    
Number of shares forfeited (in shares) 120,877 11,968    
Number of shares available for future grants (in shares) 83,499 83,499    
Weighted-average grant price of granted shares (in dollars per share) $ 27.83 $ 93.12    
Restricted Stock [Roll Forward]        
Non-vested, beginning balance (in shares)   211,510    
Granted (in shares) 837,378 52,219    
Forfeited (in shares) (120,877) (11,968)    
Vested (in shares)   (48,468)    
Nonvested, ending balance (in shares) 203,293 203,293    
Weighted Average Grant Price [Roll Forward]        
Non vested, beginning balance (in dollars per share)   $ 36.17    
Granted (in dollars per share) $ 27.83 $ 93.12    
Forfeitures (in dollars per share)   $ 35.68    
Vested (in dollars per share)   $ 38.98    
Nonvested, ending balance (in dollars per share) $ 50.07 $ 50.07    
Stock compensation expense   2,700,000 2,200,000  
Related income tax benefits recognized   1,100,000 800,000  
Unrecognized compensation expense $ 7,900,000 $ 7,900,000   $ 5,700,000
Compensation cost not yet recognized, Period for recognition   27 months 15 days