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Employee Benefit Plans (Defined Contribution Plans) (Details)
$ in Thousands
12 Months Ended
Dec. 25, 2021
USD ($)
facility
Dec. 26, 2020
USD ($)
Non-Collective-Bargaining Plan    
Defined Contribution Plans [Line Items]    
Percentage of employees covered 86.00%  
Employer matching contribution, percentage 1.00%  
Employer matching contribution, discretionary percentage 2.00%  
Maximum annual contribution per employee, percentage 3.00%  
Cost recognized $ 1,176 $ 345
Collective-Bargaining Plan    
Defined Contribution Plans [Line Items]    
Percentage of employees covered 14.00%  
Maximum annual contribution per employee, percentage 2.75%  
Cost recognized $ 101 $ 96
Number of facilities | facility 1