Note 14 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Aug. 30, 2014	May 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	May 25, 2013	Feb. 23, 2013	Nov. 24, 2012	Aug. 30, 2014		Aug. 31, 2013		Aug. 25, 2012
Note 14 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Revenues	$ 351,988	$ 352,238	$ 343,967	$ 346,704	$ 352,876	$ 335,764	$ 334,306	$ 332,569	$ 1,394,897		$ 1,355,515		$ 1,256,289
Income before income taxes	47,657	50,114	41,224	56,356	48,137	45,831	43,215	50,426	195,351		187,609		150,734
UNITED STATES
Note 14 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Revenues									1,258,609		1,223,534		1,144,753
Income before income taxes									182,354		171,899		134,651
Europe and Canada [Member]
Note 14 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Revenues									136,288	[1]	131,981	[1]	111,536	[1]
Europe, Canada, Mexico and Nicaragua [Member]
Note 14 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Income before income taxes									$ 12,997	[1]	$ 15,710	[1]	$ 16,083	[1]

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