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Derivative Instruments and Hedging Activities (Details) (USD $) |  |  | 9 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
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Sep. 27, 2014 Designated as Hedging Instrument [Member] | Dec. 28, 2013 Designated as Hedging Instrument [Member] | Sep. 27, 2014 Commodity Contracts [Member] Cash Flow Hedging [Member] Long [Member] | Sep. 27, 2014 Commodity Contracts [Member] Fair Value Hedging [Member] Short [Member] | Sep. 27, 2014 Other Current Asset [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member] | Dec. 28, 2013 Other Current Asset [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member] | Sep. 27, 2014 Other Current Asset [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member] | Dec. 28, 2013 Other Current Asset [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member] | Sep. 27, 2014 Other Assets [Member] Interest Rate Swap [Member] Designated as Hedging Instrument [Member] | Dec. 28, 2013 Other Assets [Member] Interest Rate Swap [Member] Designated as Hedging Instrument [Member] | Sep. 27, 2014 Other Current Liabilities [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member] | Dec. 28, 2013 Other Current Liabilities [Member] Commodity Contracts [Member] Designated as Hedging Instrument [Member] | Sep. 27, 2014 Other Current Liabilities [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member] | Dec. 28, 2013 Other Current Liabilities [Member] Foreign Currency Contracts [Member] Designated as Hedging Instrument [Member] | Sep. 27, 2014 Other Liabilities [Member] Interest Rate Swap [Member] Designated as Hedging Instrument [Member] | Dec. 28, 2013 Other Liabilities [Member] Interest Rate Swap [Member] Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Open future contracts to purchase copper |  |  |  |  | $ 18,000,000 | $ 11,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Time period for open copper future contract purchases |  |  |  |  | 15 months | 6 months |  |  |  |  |  |  |  |  |  |  |  |
Fair value of future contracts with gain (loss) position |  |  |  |  | (99,000) | 445,000 |  |  |  |  |  |  |  |  |  |  |  |
Other assets: Gain positions |  |  |  |  |  |  |  |  |  |  | 8,000 | 1,324,000 |  |  |  |  |  |
Other current assets: Gain positions |  |  |  |  |  |  | 526,000 | 448,000 | 0 | 836,000 |  |  |  |  |  |  |  |
Other current assets: Loss positions |  |  |  |  |  |  | (76,000) | (10,000) |  |  |  |  |  |  |  |  |  |
Other current liability: Gain positions |  |  |  |  |  |  |  |  |  |  |  |  | 10,000 | 340,000 |  | 0 |  |
Other current liability: Loss positions |  |  |  |  |  |  |  |  |  |  |  |  | (115,000) | (2,107,000) | (68,000) |  |  |
Other liabilities: Loss positions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0
Assets fair value | 458,000 | [1] | 2,598,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities fair value | $ (173,000) | [1] | $ (1,767,000) | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Does not include the impact of cash collateral received from or provided to counterparties.

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