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Business And Summary Of Significant Accounting Policies (Components Of Other Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2019
Sep. 01, 2018
Intangible Assets By Major Class [Line Items]    
Gross Carrying Amount, Total $ 235,117 $ 252,124
Accumulated Amortization (118,449) (129,400)
Customer Relationships [Member]    
Intangible Assets By Major Class [Line Items]    
Gross Carrying Amount 214,460 208,260
Accumulated Amortization $ (113,319) (101,916)
Customer Relationships [Member] | Minimum [Member]    
Intangible Assets By Major Class [Line Items]    
Weighted Average Useful Life (in years) 5 years  
Customer Relationships [Member] | Maximum [Member]    
Intangible Assets By Major Class [Line Items]    
Weighted Average Useful Life (in years) 18 years  
Contract Rights [Member]    
Intangible Assets By Major Class [Line Items]    
Weighted Average Useful Life (in years) 10 years  
Gross Carrying Amount   23,100
Accumulated Amortization   (23,100)
Trademarks [Member]    
Intangible Assets By Major Class [Line Items]    
Gross Carrying Amount $ 7,691 6,630
Accumulated Amortization $ (5,130) (4,384)
Trademarks [Member] | Minimum [Member]    
Intangible Assets By Major Class [Line Items]    
Weighted Average Useful Life (in years) 1 year  
Trademarks [Member] | Maximum [Member]    
Intangible Assets By Major Class [Line Items]    
Weighted Average Useful Life (in years) 5 years  
Trademarks [Member]    
Intangible Assets By Major Class [Line Items]    
Gross Carrying Amount, Indefinite $ 12,966 $ 14,134