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Fair Value Measurements (Outstanding Borrowings) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 25, 2012
Dec. 27, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Carrying value $ 558,125 $ 372,700
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instruments at fair value 588,466 376,856
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instruments at fair value 369,966 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Notes [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instruments at fair value 218,500 0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Old Term Loan [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instruments at fair value 0 197,700
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Subordinated Notes [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instruments at fair value $ 0 $ 179,156