Fair Value Measurement, Financial Instruments And Risk Management (Amounts Affecting Consolidated Statement Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Derivatives not designated as hedging instruments: | Other gain (loss), net | Foreign exchange forwards and options
Fair Value Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ 564	$ (36)	$ 275	$ (66)