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Fair Value Measurement, Financial Instruments And Risk Management (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Fair Value Disclosures [Line Items]
Restructuring related asset impairment	$ 0	$ 172,000
Carrying amount of assets	77,022,000us-gaap_PropertyPlantAndEquipmentNet		76,332,000us-gaap_PropertyPlantAndEquipmentNet
Total assets	322,000us-gaap_DerivativeAssets		55,000us-gaap_DerivativeAssets
Total liabilities	0us-gaap_DerivativeLiabilities		23,000us-gaap_DerivativeLiabilities
Foreign currency forward exchange contracts
Fair Value Disclosures [Line Items]
Notional amount of derivatives not designated as hedging instruments	8,600,000
Total assets	322,000		55,000
Total liabilities	0		23,000
Global Restructuring Plan (including LEAN)
Fair Value Disclosures [Line Items]
Restructuring related asset impairment	0	172,000
Fair Value, Measurements, Nonrecurring \| Global Restructuring Plan (including LEAN)
Fair Value Disclosures [Line Items]
Fair value of assets		21,000
Fair Value, Measurements, Nonrecurring \| Impairment of certain long-lived assets
Fair Value Disclosures [Line Items]
Carrying amount of assets		$ 200,000