Debt and Interest Expense Schedule of Interest Expense (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 29, 2015
Mar. 30, 2014
Dec. 28, 2014
Debt Instrument [Line Items]      
Debt Instrument, Unamortized Discount $ 12,133   $ 12,728
Interest expense, third party 19,965 22,796  
Amortization of debt acquisition costs (Note 8) 994 1,024  
Write off of Deferred Debt Issuance Cost, Gross 1,000    
Interest rate swap losses (Note 11) 393 31  
Total interest expense 21,628 24,367  
Majority Shareholder      
Debt Instrument [Line Items]      
Related party interest expense (Note 13) $ 276 $ 516