Derivative Instruments and Hedging Activities - Derivative Assets and Liabilities (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Dec. 26, 2020	Dec. 28, 2019
Derivatives, Fair Value [Line Items]
Assets fair value	$ 1,205	$ 1,423
Liabilities fair value	(5,795)	(109)
Other Current Asset [Member] \| Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Other current assets: Gain positions	1,213	1,435
Other current assets: Loss positions	(8)	(12)
Other Current Liabilities [Member] \| Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Other current liability: Gain positions	68	50
Other current liability: Loss positions	$ (5,863)	$ (159)

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

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