Derivative Instruments and Hedging Activities (Details) (USD $)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011 Other Current Asset [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member]	Dec. 29, 2012 Other Current Asset [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member]	Dec. 29, 2012 Other Current Liabilities [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member]	Dec. 31, 2011 Other Current Liabilities [Member] Commodity 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 fair value of cash flow hedges whose realized losses would be reclassified into earnings	$ 249,000
Open future contracts to purchase copper	21,500,000
Time period for open copper future contract purchases	12 months
Fair value of future contracts with loss position	248,000
Derivatives, Fair Value [Line Items]
Other current assets: gain positions		85,000	307,000
Other current assets: loss positions		(25,000)
Other current liability: gain positions				172,000	339,000
Other current liability: loss positions				(420,000)	(1,078,000)	(307,000)
Open future contracts to sell copper	$ 65,900,000
Time period for open future contract sales	5 months