Fair Value Measurement, Financial Instruments And Risk Management (Amounts Affecting Consolidated Statement Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 25, 2011	Dec. 26, 2010	Dec. 27, 2009
Cash Flow Hedges [Member]
Fair Value Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives	$ (658)	$ 2,111	$ 723
Amount of Gain (Loss) Reclassified From Accumulate Other Comprehensive Income into Income	(1,792)	1,035	620
Amount of Forward Points Recognized in Other Gain (Loss), net	(296)	(124)	(77)
Cash Flow Hedges [Member] | Cost Of Sales [Member] | Foreign Currency Revenue Forecast Contracts [Member]
Fair Value Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives	(658)	1,940	(21)
Amount of Gain (Loss) Reclassified From Accumulate Other Comprehensive Income into Income	(1,792)	1,194	1,693
Amount of Forward Points Recognized in Other Gain (Loss), net	(296)	(124)	(77)
Cash Flow Hedges [Member] | Interest Expense [Member] | Interest Rate Swap Contracts [Member]
Fair Value Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives		171	744
Amount of Gain (Loss) Reclassified From Accumulate Other Comprehensive Income into Income		(159)	(1,073)
Derivatives Not Designated As Hedging Instruments [Member] | Other Gain (Loss), Net [Member] | Foreign Exchange Forwards And Options [Member]
Fair Value Disclosures [Line Items]
Amount gain (loss) recognized in income on derivatives	$ (155)	$ 77	$ (257)