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Accounts Payable and Accrued Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 30, 2013
Dec. 29, 2012
Accounts payable and accrued liabilities    
Accounts payable to vendors $ 135,308 $ 127,969
Accrued salaries, wages, incentive compensation and other fringe benefits 23,344 21,759
Accrued interest 7,821 18,630
Other accrued expenses 26,703 28,547
Total $ 193,176 $ 196,905