Derivative Instruments and Hedging Activities - Derivative Assets and Liabilities (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Assets fair value	$ 1,009	$ 865
Liabilities fair value	(3,155)	(1,143)
Other Current Asset [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions	1,014	1,013
Other current assets: Loss positions	(5)	(148)
Other Current Asset [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Loss positions	0	0
Other Current Liabilities [Member] | Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions	55	564
Other current liability: Loss positions	(3,210)	(920)
Other Current Liabilities [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Loss positions	$ 0	$ (787)