Derivative Instruments and Hedging Activities (Details) (USD $)	3 Months Ended
	Mar. 30, 2013	Dec. 29, 2012 Other Current Asset [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member]	Mar. 30, 2013 Other Current Asset [Member] Firm Commitment [Member] Designated as Hedging Instrument [Member]	Mar. 30, 2013 Other Current Liabilities [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member]	Dec. 29, 2012 Other Current Liabilities [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member]	Mar. 30, 2013 Other Current Liabilities [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member]	Dec. 29, 2012 Other Current Liabilities [Member] Firm Commitment [Member] Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities [Abstract]
Net value in OCI to be reclassified into earnings in next twelve months	$ 1,400,000
Open future contracts to purchase copper	28,400,000
Time period for open copper future contract purchases	9 months
Fair value of future contracts with loss position	1,400,000
Derivatives, Fair Value [Line Items]
Other current assets: gain positions		307,000	53,000
Other current liability: gain positions					172,000
Other current liability: loss positions				(1,371,000)	(420,000)	(53,000)	(307,000)
Open future contracts to sell copper	$ 49,500,000
Time period for open future contract sales	6 months