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SHARE-BASED COMPENSATION (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract]      
Number of shares granted (in shares) 76,417    
Number of shares forfeited (in shares) (19,260)    
Weighted-average grant price of granted shares (in dollars per share) $ 38.99    
Restricted Stock [Roll Forward]      
Non-vested, beginning balance (in shares) 228,592    
Granted (in shares) 76,417    
Forfeited (in shares) (19,260)    
Vested (in shares) (75,419)    
Nonvested, ending balance (in shares) 210,330 228,592  
Weighted Average Grant Price [Roll Forward]      
Non vested, beginning balance (in dollars per share) $ 21.10    
Granted (in dollars per share) $ 38.99    
Forfeitures (in dollars per share) $ 32.68    
Vested (in dollars per share) $ 20.30    
Nonvested, ending balance (in dollars per share) $ 26.85 $ 21.10  
Stock compensation expense $ 1,955,000 $ 1,256,000 $ 973,000
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 December 31, 2012 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.    
Numerator used for calculating the number of whole shares granted 75,000    
Award vesting period 1 year    
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract]      
Number of shares authorized for grants (in shares) 800,000    
Number of shares granted (in shares) (688,371)    
Number of shares forfeited (in shares) 79,998    
Number of shares available for future grants (in shares) 191,627    
Weighted-average grant price of granted shares (in dollars per share) $ 19.61    
Restricted Stock [Roll Forward]      
Granted (in shares) (688,371)    
Forfeited (in shares) 79,998    
Weighted Average Grant Price [Roll Forward]      
Granted (in dollars per share) $ 19.61    
Stock compensation expense 2,000,000 1,300,000 1,000,000
Related income tax benefit recognized in earnings 800,000 500,000 400,000
Unrecognized compensation expense 4,600,000 4,100,000  
Compensation cost not yet recognized, Period for recognition 28 months 6 days    
Shares of the Company's common stock authorized for purchase 800,000    
Stock Options [Member]
     
Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding and exercisable (in shares)   0 50,000
Exercised (in shares)     (50,000)
Outstanding and exercisable (in shares)     0
Options Price Per Share [Roll Forward]      
Outstanding and exercisable options price per share (in dollars per share)   $ 0  
Outstanding and exercisable options price per share (in dollars per share)     $ 0
Share-based Payment Award, Options, Weighted Average Exercise Price [Roll Forward]      
Outstanding and exercisable, weighted average exercise price (in dollars per share)   $ 0 $ 2.50
Exercised, weighted average exercise price (in dollars per share)     $ 2.50
Outstanding and exercisable, weighted average exercise price (in dollars per share)     $ 0
Aggregate Intrinsic Value [Abstract]      
Outstanding, aggregate intrinsic value   0 529,000
Exercised, aggregate intrinsic value     489,000
Outstanding, aggregate intrinsic value     0
Cash received from stock options exercised $ 0 $ 0 $ 125,000
Stock Options [Member] | Minimum [Member]
     
Weighted Average Grant Price [Roll Forward]      
Weighted average remaining contractual term 12 months    
Options Price Per Share [Roll Forward]      
Outstanding and exercisable options price per share (in dollars per share)     $ 1.25
Exercised options price per share (in dollars per share)     $ 1.25
Stock Options [Member] | Maximum [Member]
     
Weighted Average Grant Price [Roll Forward]      
Weighted average remaining contractual term 10 years    
Options Price Per Share [Roll Forward]      
Outstanding and exercisable options price per share (in dollars per share)     $ 3.36
Exercised options price per share (in dollars per share)     $ 3.36
Stock Options [Member] | Employee Stock Option Plan [Member]
     
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract]      
Number of shares authorized for grants (in shares) 1,800,000    
Weighted Average Grant Price [Roll Forward]      
Shares of the Company's common stock authorized for purchase 1,800,000    
Stock Options [Member] | Long Term Incentive Plan [Member]
     
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract]      
Number of shares authorized for grants (in shares) 660,000    
Weighted Average Grant Price [Roll Forward]      
Shares of the Company's common stock authorized for purchase 660,000    
Stock Options [Member] | Director Stock Option Plan [Member]
     
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract]      
Number of shares authorized for grants (in shares) 400,000    
Weighted Average Grant Price [Roll Forward]      
Shares of the Company's common stock authorized for purchase 400,000