Derivative Instruments (Fair Value Of Derivative Instruments In The Condensed Consolidated Balance Sheets Using Level 2 Inputs) (Details) (Derivatives Designated As Hedging Instruments [Member], Fair Value, Inputs, Level 2 [Member], USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Derivative [Line Items]
Total fair value of derivative instruments	$ (1,555)	$ (1,590)
Interest Rate Swaps [Member] | Accrued Liabilities [Member]
Derivative [Line Items]
Total fair value of derivative instruments	(7)	(15)
Interest Rate Swaps [Member] | Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Total fair value of derivative instruments	(1,429)	(1,575)
Foreign Exchange Forward [Member] | Accrued Liabilities [Member]
Derivative [Line Items]
Total fair value of derivative instruments	$ (119)	$ 0