Business And Summary Of Significant Accounting Policies (Components Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 01, 2018	Sep. 02, 2017
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount, Total	$ 252,124	$ 228,968
Accumulated Amortization	(129,400)	(118,539)
Customer Relationships [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	208,260	187,260
Accumulated Amortization	$ (101,916)	(92,381)
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	23,100
Accumulated Amortization	(23,100)	(23,100)
Trademark [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	6,630	4,403
Accumulated Amortization	$ (4,384)	(3,058)
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	$ 14,134	$ 14,205