Fair Value Measurement, Financial Instruments and Risk Management (Fair Values of Derivative Instruments Included within the Consolidated Balance Sheets) (Details) (USD $) In Thousands	Jun. 26, 2011	Dec. 26, 2010
Derivative Assets, Fair Value	$ 52	$ 965
Derivative Liabilities, Fair Value	724	298
Other Current Assets [Member] | Foreign Currency Revenue Forecast Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivative Assets, Fair Value	45	938
Other Current Liabilities [Member] | Foreign Currency Revenue Forecast Contracts [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivative Liabilities, Fair Value	724	278
Derivatives Designated as Hedging Instruments [Member]
Derivative Assets, Fair Value	45	938
Derivative Liabilities, Fair Value	724	278
Other Current Assets [Member] | Foreign Currency Forward Exchange Contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivative Assets, Fair Value	7	27
Other Current Liabilities [Member] | Foreign Currency Forward Exchange Contracts [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivative Liabilities, Fair Value		20
Derivatives Not Designated as Hedging Instruments [Member]
Derivative Assets, Fair Value	7	27
Derivative Liabilities, Fair Value		20
Foreign Currency Revenue Forecast Contracts [Member]
Derivative Assets, Fair Value	45	938
Derivative Liabilities, Fair Value	724	278
Foreign Currency Forward Exchange Contracts [Member]
Derivative Assets, Fair Value	7	27
Derivative Liabilities, Fair Value		$ 20