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Employee Benefit Plans - (Components of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 27, 2023
Dec. 28, 2022
Dec. 29, 2021
Retirement Benefits [Abstract]      
Net periodic benefit cost (credit) excluding service cost, statement of income or comprehensive income General and administrative expenses    
Components of net periodic benefit cost [Abstract]      
Interest cost $ 53 $ 36 $ 26
Amortization of net loss 56 123 159
Settlement loss recognized 35 74 0
Plan experience gain (53) 0 0
Net periodic benefit cost $ 91 $ 233 $ 185