Interest Rate Swaps - Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 26, 2021	Dec. 26, 2020	Jun. 27, 2020
Derivative [Line Items]
Total Derivative Asset	$ 167	$ 0	$ 0
Total Derivative Liability	1,240	4,364	8,515
Interest Rate Swap Asset Portion
Derivative [Line Items]
Derivative Asset, Noncurrent	167	0	0
Interest Rate Swap Liability Portion
Derivative [Line Items]
Derivative Liability, Current	1,240	1,227	3,112
Derivative Liability, Noncurrent	$ 0	$ 3,137	$ 5,403

Fair value, after the effects of master netting arrangements, of a 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. Includes assets not subject to a master netting arrangement and not elected to be offset.

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