Fair Value Measurement, Financial Instruments And Risk Management (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Fair Value Disclosures [Line Items]
Restructuring related asset impairment	$ 0	$ 172
Carrying amount of assets	77,022		$ 76,332
Total assets	322		55
Total liabilities	0		23
Foreign currency forward exchange contracts
Fair Value Disclosures [Line Items]
Notional amount of derivatives not designated as hedging instruments	8,600
Total assets	322		55
Total liabilities	0		$ 23
Global Restructuring Plan (including LEAN)
Fair Value Disclosures [Line Items]
Restructuring related asset impairment	$ 0	172
Fair Value, Measurements, Nonrecurring | Global Restructuring Plan (including LEAN)
Fair Value Disclosures [Line Items]
Fair value of assets		21
Fair Value, Measurements, Nonrecurring | Impairment of certain long-lived assets
Fair Value Disclosures [Line Items]
Carrying amount of assets		$ 200