Significant Accounting Policies (Details 7) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013	Sep. 29, 2013 Measured on Recurring Basis Level 1 Other assets		Dec. 30, 2012 Measured on Recurring Basis Level 1 Other assets		Sep. 29, 2013 Measured on Recurring Basis Level 2 Other long-term liabilities	Dec. 30, 2012 Measured on Recurring Basis Level 2 Other long-term liabilities	Sep. 29, 2013 Measured on Recurring Basis Carrying Value Other assets		Dec. 30, 2012 Measured on Recurring Basis Carrying Value Other assets		Sep. 29, 2013 Measured on Recurring Basis Carrying Value Other long-term liabilities	Dec. 30, 2012 Measured on Recurring Basis Carrying Value Other long-term liabilities
Measurement of financial assets and liabilities at fair value on a recurring basis
Cash surrender value of life insurance policies		$ 15,896	[1]	$ 13,551	[1]			$ 15,896	[1]	$ 13,551	[1]
Interest rate swap liabilities						471	104					471	104
Transfers among levels within the fair value hierarchy	$ 0

[1] Represents life insurance policies held in our non-qualified deferred compensation plan.