Summary Of Significant Accounting Policies (Components Of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount, Total	$ 217,906	$ 217,669
Accumulated Amortization	(79,592)	(62,345)
Customer Relationships [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	175,160	175,160
Accumulated Amortization	(57,994)	(43,998)
Customer Relationships [Member] | Minimum [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	5 years
Customer Relationships [Member] | Maximum [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	18 years
Non-Compete Agreements [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	1,348	1,348
Accumulated Amortization	(1,210)	(881)
Non-Compete Agreements [Member] | Minimum [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	2 years
Non-Compete Agreements [Member] | Maximum [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	3 years
Contract Rights [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	10 years
Gross Carrying Amount	23,100	23,100
Accumulated Amortization	(19,058)	(16,748)
Trademark [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	3,380	3,380
Accumulated Amortization	(1,330)	(718)
Trademark [Member] | Minimum [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	1 year
Trademark [Member] | Maximum [Member]
Intangible Assets By Major Class [Line Items]
Average Useful Life (in years)	5 years
Trademarks And License Agreement [Member]
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount, Indefinite	$ 14,918	$ 14,681