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Interest Rate Swaps Estimated Amount to be Reclassified into Earnings Next 12 Months (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Derivative [Line Items]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax $ (4,631) $ (5,556) $ 612
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (3,243) $ 199