Derivative Instruments and Hedging Activities - Derivative Assets and Liabilities (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Derivatives, Fair Value [Line Items]
Assets fair value	$ 87	$ 1,009
Liabilities fair value	(1,279)	(3,155)
Other Current Asset [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions	88	1,014
Other current assets: Loss positions	(1)	(5)
Other Current Liabilities [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions	103	55
Other current liability: Loss positions	$ (1,382)	$ (3,210)