Fair Value Measurement, Financial Instruments And Risk Management (Fair Values Of Derivative Instruments Included Within The Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 25, 2011	Dec. 26, 2010
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	$ 1,583	$ 965
Derivative Liabilities, Fair Value	415	298
Foreign Currency Revenue Forecast Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	1,120	938
Derivative Liabilities, Fair Value		278
Foreign Currency Forward Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	463	27
Derivative Liabilities, Fair Value	415	20
Derivatives Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	1,120	938
Derivative Liabilities, Fair Value		278
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Revenue Forecast Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	1,120	938
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Revenue Forecast Contracts [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value		278
Derivatives Not Designated As Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	463	27
Derivative Liabilities, Fair Value	415	20
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Currency Forward Exchange Contracts [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Fair Value	463	27
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Currency Forward Exchange Contracts [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Fair Value	$ 415	$ 20