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Derivative Instruments And Hedging Activity (Schedule Of Fair Value Of Derivative Instruments By Balance Sheet Location) (Details) (USD $) In Thousands	Sep. 24, 2011	Dec. 25, 2010	Sep. 25, 2010
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, Total Liabilities	$ 38	$ 434	$ 304
Fair value of derivative instruments, Total assets	1,677	253
Foreign Exchange Contracts [Member] \| Derivatives Designated As Hedging Instruments [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, Total Liabilities		317	304
Foreign Exchange Contracts [Member] \| Derivatives Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, Total assets	559
Commodity Contracts - Fuel [Member] \| Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, Total assets	725	253
Foreign Exchange Contracts [Member] \| Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, Total Liabilities	38	117
Foreign Exchange Contracts [Member] \| Derivatives Not Designated As Hedging Instruments [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative instruments, Total assets	$ 393

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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