Derivative Instruments and Hedging Activities (Details) $ in Thousands, € in Millions		3 Months Ended
		Apr. 02, 2016 USD ($)	Apr. 02, 2016 EUR (€)	Dec. 26, 2015 USD ($)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Assets fair value	[1]	$ 660		$ 60
Liabilities fair value	[1]	(3,176)		(3,359)
Commodity Contracts [Member] | Cash Flow Hedging [Member] | Long [Member]
Derivatives, Fair Value [Line Items]
Open future contracts to purchase copper		$ 23,700
Time period for open copper future contract purchases		9 months
Fair value of future contracts with gain (loss) position		$ 21
Commodity Contracts [Member] | Fair Value Hedging [Member] | Short [Member]
Derivatives, Fair Value [Line Items]
Open future contracts to sell copper		$ 21,000
Time period for open copper future contract sales		4 months
Fair value of future contracts with gain (loss) position		$ (307)
Foreign Currency Contracts [Member] | Cash Flow Hedging [Member] | Long [Member]
Derivatives, Fair Value [Line Items]
Open forward contracts to purchase copper | €			€ 2.7
Time period for open copper forward contract purchases		8 months
Fair value of forward contracts with gain loss position		$ 88
Other Current Asset [Member] | Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions		654		60
Other current assets: Loss positions		(82)		0
Other Current Asset [Member] | Foreign Currency Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions		88		0
Other current assets: Loss positions		0		0
Other Assets [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other assets: Gain positions		0		0
Other Current Liabilities [Member] | Commodity Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions		122		238
Other current liability: Loss positions		(979)		(1,864)
Other Current Liabilities [Member] | Foreign Currency Contracts [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions		0		34
Other current liability: Loss positions		0		(75)
Other Liabilities [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Other liabilities: Loss positions		$ (2,319)		$ (1,692)

[1] Does not include the impact of cash collateral provided to counterparties.