Fair Value Measurement, Financial Instruments And Risk Management (Amounts Affecting Consolidated Statement Of Operations) (Details) (Derivatives not designated as hedging instruments, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Cost of sales | Foreign currency revenue forecast contracts
Fair Value Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivatives	$ 0	$ 0	$ 507
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	0	(161)	(1,994)
Amount of Forward Points Recognized in Other Gain (Loss), net	0	11	102
Other gain (loss), net | Foreign exchange forwards and options
Fair Value Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 425	$ (404)	$ 261