Note 8 - Goodwill and Other Intangible Assets (Details) - Summary of intangible assets (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 181,189	$ 172,752
Accumulated Amortization	131,845	122,221
Net Carrying Amount	49,344	50,531
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	152,672	144,842
Accumulated Amortization	105,275	96,262
Net Carrying Amount	47,397	48,580
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,517	27,910
Accumulated Amortization	26,570	25,959
Net Carrying Amount	$ 1,947	$ 1,951