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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 30, 2022
Dec. 31, 2021
Dec. 25, 2020
Dec. 27, 2019
Other Details        
Accounts Receivable, Allowance for Credit Loss $ 6,130,000 $ 3,254,000 $ 3,745,000 $ 4,828,000
Accounts Receivable, Credit Loss Expense (Reversal) 3,567,000 (27,000) 647,000  
Accounts Receivable, Allowance for Credit Loss, Writeoff (633,000) (676,000) (2,732,000)  
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) (58,000) 212,000 1,002,000  
Write-downs of long-lived assets 0      
Other Asset Impairment Charges   35,000,000    
Amortization of intangible assets 18,900,000 17,900,000 16,700,000  
Cash surrender value of life insurance change 4,000,000 3,300,000 $ 2,200,000  
Self insured reserves 9,300,000 9,300,000    
Derivative, Notional Amount $ 48,000,000      
Minimum        
Other Details        
Capitalized software estimated useful life 2 years      
Minimum | Buildings and improvements        
Other Details        
Property, plant and equipment, useful life 10 years      
Minimum | Leasehold improvements        
Other Details        
Property, plant and equipment, useful life 5 years      
Minimum | Manufacturing equipment        
Other Details        
Property, plant and equipment, useful life 5 years      
Minimum | Office, warehouse and automotive equipment        
Other Details        
Property, plant and equipment, useful life 3 years      
Maximum        
Other Details        
Capitalized software estimated useful life 5 years      
Maximum | Buildings and improvements        
Other Details        
Property, plant and equipment, useful life 30 years      
Maximum | Leasehold improvements        
Other Details        
Property, plant and equipment, useful life 10 years      
Maximum | Manufacturing equipment        
Other Details        
Property, plant and equipment, useful life 10 years      
Maximum | Office, warehouse and automotive equipment        
Other Details        
Property, plant and equipment, useful life 10 years      
Trade Accounts Receivable        
Other Details        
Accounts receivable $ 334,000,000 315,000,000    
Other Receivables        
Other Details        
Accounts receivable $ 12,000,000 $ 10,000,000