Business And Summary Of Significant Accounting Policies (Components Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 28, 2021	Aug. 29, 2020
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount, Total	$ 241,813	$ 234,674
Accumulated Amortization	(139,959)	(129,801)
Customer Relationships [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	220,669	214,460
Accumulated Amortization	$ (133,361)	(123,958)
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
Non-Compete Agreements [Member]
Intangible Assets By Major Class [Line Items]
Weighted Average Useful Life (in years)	3 years
Gross Carrying Amount	$ 766
Accumulated Amortization	(21)
Trademark [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	7,567	7,403
Accumulated Amortization	$ (6,577)	(5,843)
Trademark [Member] | Minimum [Member]
Intangible Assets By Major Class [Line Items]
Weighted Average Useful Life (in years)	1 year
Trademark [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	$ 12,811	12,811
Accumulated Amortization