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LONG-TERM DEBT (Details) (USD $)
6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2013
May 07, 2013
Dec. 31, 2012
May 07, 2013
Senior secured term loan
Nov. 27, 2012
Senior secured term loan
Jun. 30, 2013
Senior secured term loan
Dec. 31, 2012
Senior secured term loan
Jun. 30, 2013
Senior secured term loan
Adjusted Eurodollar Rate
Jun. 30, 2013
Senior secured term loan
Base Rate
May 07, 2013
Incremental Term Loan
Debt                    
Senior secured term loan $ 398,500,000 $ 400,000,000 $ 200,000,000              
Less: Unamortized discount, net (821,000)   (1,973,000)   (2,000,000)          
Net long-term debt 397,679,000   198,027,000              
Less: Current portion (4,000,000)   (2,000,000)              
Long-term debt, less current portion 393,679,000   196,027,000              
Amount borrowed         200,000,000         200,000,000
Original issue discount (as a percent)         1.00%          
Original issue premium                   1,000,000
Proceeds from issuance of long-term debt 201,000,000       198,000,000         201,000,000
Quarterly principal installments of loan as a percentage of the initial principal amount                   0.25%
Aggregate amount of each quarterly scheduled principal installment       1,000,000            
Payment of legal fees and other costs 2,400,000                 2,400,000
Reference rate               Adjusted Eurodollar Rate Base Rate  
Fixed interest rate base (as a percent)               1.25% 2.25%  
Interest rate margin (as a percent)               4.50% 3.50%  
Debt issuance costs, net 6,394,000   4,260,000     6,400,000 4,300,000      
Accumulated amortization           $ 500,000 $ 100,000      
Interest rate at the end of the period (as a percent)           5.75%