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Long term debt (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
7.75% senior notes $ 610,000 $ 610,000
Less: Current portion of long-term debt 0 (5,937)
Long-term debt, net 2,533,987 2,620,956
Term Loan and Securitization Facility:
   
Debt Instrument [Line Items]    
Less: term loan discount (29,888) (33,107)
Total Term Loan and Securitization Facility 1,923,987 2,016,893
7.75% senior notes
   
Debt Instrument [Line Items]    
7.75% senior notes 610,000 610,000
Term loan | Term Loan and Securitization Facility:
   
Debt Instrument [Line Items]    
Term Loan and Securitization Facility: 1,953,875 2,025,000
Securitization facility | Term Loan and Securitization Facility:
   
Debt Instrument [Line Items]    
Term Loan and Securitization Facility: $ 0 $ 25,000