Note 15 - Segment Reporting (Details) - Summary of revenues and income before income taxes (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 31, 2013		Aug. 25, 2012		Aug. 27, 2011
Note 15 - Segment Reporting (Details) - Summary of revenues and income before income taxes [Line Items]
Revenues	$ 1,355,515		$ 1,256,289		$ 1,134,126
Income before income taxes	187,609		150,734		120,572
United States [Member]
Note 15 - Segment Reporting (Details) - Summary of revenues and income before income taxes [Line Items]
Revenues	1,236,414		1,144,753		1,029,003
Income before income taxes	171,899		134,651		105,257
Europe and Canada [Member]
Note 15 - Segment Reporting (Details) - Summary of revenues and income before income taxes [Line Items]
Revenues	119,101	[1]	111,536	[1]	105,123	[1]
Europe, Canada, Mexico and Nicaragua [Member]
Note 15 - Segment Reporting (Details) - Summary of revenues and income before income taxes [Line Items]
Income before income taxes	$ 15,710	[1]	$ 16,083	[1]	$ 15,315	[1]

[1] No country accounts for greater than 10% of total long-lived assets, revenues or income before income taxes.