Accounts Payable and Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Dec. 29, 2012
Accounts payable and accrued liabilities
Accounts payable to vendors	$ 143,543	$ 127,969
Accrued salaries, wages, incentive compensation and other fringe benefits	24,382	21,759
Accrued interest	7,758	18,630
Other accrued expenses	30,539	28,547
Total	$ 206,222	$ 196,905

Carrying value as of the balance sheet date of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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