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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 27, 2019
Dec. 28, 2018
Dec. 29, 2017
Other Details      
Write-downs of long-lived assets $ 0    
Amortization of intangible assets 15,500,000 $ 15,600,000 $ 14,800,000
Cash surrender value of life insurance change 3,400,000 (1,800,000) $ 2,300,000
Self insured reserves 7,600,000 7,900,000  
Derivative, Notional Amount $ 33,000,000    
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    
Other Current Liabilities      
Other Details      
Self insured reserves $ 7,600,000 7,900,000  
Trade Accounts Receivable      
Other Details      
Accounts receivable 256,000,000 262,000,000  
Other Receivables      
Other Details      
Accounts receivable $ 11,000,000 $ 13,000,000