Fair Value Measurement, Financial Instruments And Risk Management (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014	Dec. 28, 2014
Fair Value Disclosures [Line Items]
Restructuring related asset impairment			$ 0	$ 172
Carrying amount of assets	$ 77,336		77,336		$ 76,332
Asset Derivatives	19		19		55
Liability Derivatives	37		37		23
Foreign currency forward exchange contracts
Fair Value Disclosures [Line Items]
Notional amount of derivatives not designated as hedging instruments	5,400		5,400
Asset Derivatives	19		19		55
Liability Derivatives	37		37		$ 23
Global Restructuring Plan (including LEAN)
Fair Value Disclosures [Line Items]
Restructuring related asset impairment	$ 0	$ 0	$ 0	172
Fair Value, Measurements, Nonrecurring | Global Restructuring Plan (including LEAN)
Fair Value Disclosures [Line Items]
Fair value of assets		21		21
Fair Value, Measurements, Nonrecurring | Impairment of certain long-lived assets
Fair Value Disclosures [Line Items]
Carrying amount of assets		$ 200		$ 200