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Employee Benefit Plans - (Benefits Expected to be Paid in Future Years) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 27, 2023
Dec. 28, 2022
Retirement Benefits [Abstract]    
Employer contributions $ 552 $ 388
Estimated employer contributions, next fiscal year 600  
Benefits expected to be paid:    
2024 582  
2025 116  
2026 114  
2027 86  
2028 73  
2028 through 2032 $ 234