Accounts Payable and Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Accounts payable and accrued liabilities
Accounts payable to vendors	$ 209,031	$ 127,969
Accrued salaries, wages, incentive compensation and other fringe benefits	33,889	21,759
Accrued interest	19,063	18,630
Other accrued expenses	45,678	28,547
Total	$ 307,661	$ 196,905