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Employee Benefit Plans - (Change in Benefit Obligation and Plan Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 29, 2021
Dec. 30, 2020
Dec. 25, 2019
Change in Benefit Obligation:      
Benefit obligation at beginning of year $ 2,298 $ 2,337  
Interest cost 26 41 $ 81
Actuarial losses 46 448  
Benefits paid (151) (151)  
Settlements 0 (377)  
Benefit obligation at end of year 2,219 2,298 2,337
Accumulated benefit obligation 2,219 2,298  
Change in Plan Assets:      
Fair value of plan assets at beginning of year 0 0  
Employer contributions 151 528  
Benefits paid (151) (151)  
Settlements 0 (377)  
Fair value of plan assets at end of year 0 0 $ 0
Unfunded status at end of year (2,219) (2,298)  
Amounts recognized on the balance sheet:      
Other current liabilities  (944) (717)  
Other noncurrent liabilities (1,275) (1,581)  
Net amount recognized  (2,219) (2,298)  
Amounts in accumulated other comprehensive loss not yet reflected in net period benefit cost:      
Unamortized actuarial losses, net (974) (1,087)  
Other changes in plan assets and benefit obligations recognized in accumulated other comprehensive loss:      
Benefit obligation actuarial loss (46) (448)  
Amortization of net loss 159 89  
Settlement loss recognized 0 95  
Other comprehensive income (loss) $ 113 $ (264)