Financial Instruments - Summary of Location and Fair Value (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018
Derivatives, Fair Value [Line Items]
Total derivative assets	$ 1,342	$ 87
Total derivative liabilities	(90)	(1,279)
Other Current Assets [Member] | Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions	1,366	88
Other current assets: Loss positions	(24)	(1)
Other Current Liabilities [Member] | Commodity Contracts [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions	0	103
Other current liability: Loss positions	$ (90)	$ (1,382)