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Interest Rate Swaps - Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 27, 2021
Dec. 26, 2020
Mar. 28, 2020
Derivative [Line Items]      
Total Derivative Liability $ 1,503 $ 4,364 $ 6,789
Interest Rate Swap Liability Portion      
Derivative [Line Items]      
Derivative Liability, Current 1,229 1,227 2,512
Derivative Liability, Noncurrent $ 274 $ 3,137 $ 4,277