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Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 28, 2020
Mar. 30, 2019
Dec. 28, 2019
Derivative [Line Items]      
Restricted cash in other current assets as collateral related to open derivative contracts $ 16,800   $ 200
Commodity Contracts [Member]      
Derivative [Line Items]      
Deferred net losses, net of tax, included in AOCI 3,000    
Cash Flow Hedging [Member] | Commodity Contracts [Member] | Long [Member]      
Derivative [Line Items]      
Open option contracts written, at fair value $ 78,900    
Time period for open copper future contract purchases 12 months    
Fair value of future contracts with net loss position $ (12,500)    
Fair Value Hedging [Member] | Commodity Contracts [Member] | Short [Member]      
Derivative [Line Items]      
Fair value of future contracts with net loss position 39    
Open future contracts to sell copper $ 1,300    
Time period for open copper future contract sales 12 months    
Cost of Goods Sold [Member] | Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member]      
Derivative [Line Items]      
Undesignated derivative contracts $ (9,476) $ 1,442