Financial Instruments - Schedule of Interest Rate Swaps (Details) (Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Gain/(loss) recognized in accumulated other comprehensive income	$ (1,663)	$ (4,045)
Interest Expense [Member]
Derivative [Line Items]
Gain/(loss) reclassified from accumulated other comprehensive income (effective portion)	(2,001)	(3,019)
Other Expense [Member]
Derivative [Line Items]
Gain/(loss) recognized in income (ineffective portion)	25	(4)
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Fair value	$ (2,853)	$ (3,216)