Goodwill And Other Intangible Assets (Schedule Of Other Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 02, 2019	Sep. 01, 2018
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Total	$ 235,175	$ 229,024
Accumulated Amortization	(112,113)	(106,300)
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite	14,199	14,134
Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	214,460	208,260
Accumulated Amortization	(107,423)	(101,916)
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,516	6,630
Accumulated Amortization	$ (4,690)	$ (4,384)
Minimum [Member] | Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	5 years
Minimum [Member] | Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	1 year
Maximum [Member] | Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	18 years
Maximum [Member] | Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted Average Useful Life (in years)	5 years