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Interest Rate Swaps Schedule of Changes in AOCL Net of Tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]      
Other Comprehensive Income (Loss), Net of Tax $ (3,442) $ (4,332) $ 456
Ending fiscal year AOCI balance (3,243) 199  
Fair Value, Option, Changes in Fair Value, Gain (Loss) (5,666) (4,332)  
Debt and Equity Securities, Gain (Loss), Excluding Other-than-temporary Impairment Loss $ 2,224 $ 0  
New Accounting Pronouncement or Change in Accounting Principle, Description of Prior-period Information Retrospectively Adjusted 2,084,880