v2.4.0.6
LONG-TERM DEBT LIABILITIES - Senior Debt (Details) (USD $)
12 Months Ended
Dec. 31, 2012
number
Dec. 31, 2011
Dec. 31, 2010
Debt Instrument [Line Items]      
Credit Facility $ 425,000,000    
Consolidated Leverage Ratio 4.8    
Consolidated Interest Coverage Ratio 2.4    
Amortization of deferred financing costs 4,651,000 3,592,000 3,912,000
Gains (Losses) on Extinguishment of Debt (747,000) (1,144,000) (62,000)
Weighted average interest rate under the senior debt 5.01% 6.24%  
Credit Facility paid off   535,500,000  
Minimum
     
Debt Instrument [Line Items]      
Consolidated Interest Coverage Ratio 1.5 1.6 2.0
Mandatory Prepayment Percentage 0.00%    
Maximum
     
Debt Instrument [Line Items]      
Consolidated Leverage Ratio 7.0 6.5 4.5
Mandatory Prepayment Percentage 50.00%    
Revolving Credit Facility
     
Debt Instrument [Line Items]      
Credit Facility 50,000,000    
Undrawn amount of the Revolver 44,400,000    
Line of Credit Facility, Amount Outstanding 5,000,000    
Revolving Credit Facility | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 1.00%    
Term Loan B
     
Debt Instrument [Line Items]      
Credit Facility 375,000,000    
Mandatory prepayments amount 6,000,000    
Line of Credit Facility, Amount Outstanding 347,500,000    
Senior Debt Obligations
     
Debt Instrument [Line Items]      
Commitment fee 0.50%    
Senior Debt Obligations | Revolving Credit Facility | Federal Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.50%    
Senior Debt Obligations | Revolving Credit Facility | Minimum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 4.50%    
Senior Debt Obligations | Revolving Credit Facility | Minimum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 3.50%    
Senior Debt Obligations | Revolving Credit Facility | Maximum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 5.00%    
Senior Debt Obligations | Revolving Credit Facility | Maximum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 4.00%    
Senior Debt Obligations | Term Loan B | Libor Rate Floor
     
Debt Instrument [Line Items]      
Variable rate 1.25%    
Senior Debt Obligations | Term Loan B | Minimum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 3.50%    
Senior Debt Obligations | Term Loan B | Minimum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 2.50%    
Senior Debt Obligations | Term Loan B | Maximum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 3.75%    
Senior Debt Obligations | Term Loan B | Maximum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 2.75%    
Former Facility | Minimum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.50%    
Former Facility | Minimum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.00%    
Former Facility | Maximum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 2.50%    
Former Facility | Maximum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 1.50%    
Former Facility | Prior To Adjustment | Minimum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.50%    
Former Facility | Prior To Adjustment | Minimum | Prime Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.00%    
Former Facility | Prior To Adjustment | Minimum | Federal Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.50%    
Former Facility | Prior To Adjustment | Maximum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 1.10%    
Former Facility | Prior To Adjustment | Maximum | Prime Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.10%    
Former Facility | Prior To Adjustment | Maximum | Federal Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 0.60%    
Former Facility | Revolving Credit Facility
     
Debt Instrument [Line Items]      
Credit Facility paid off   $ 60,000,000  
Former Facility | Term Loan | Minimum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 4.75%    
Former Facility | Term Loan | Minimum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 3.75%    
Former Facility | Term Loan | Maximum | Libor Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 5.00%    
Former Facility | Term Loan | Maximum | Base Rate Plus
     
Debt Instrument [Line Items]      
Variable rate 4.00%