Note 15 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Aug. 29, 2015	May. 30, 2015	Feb. 28, 2015	Nov. 29, 2014	Aug. 30, 2014	May. 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 29, 2015	Aug. 30, 2014	Aug. 31, 2013
Note 15 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Revenues		$ 359,208	$ 365,574	$ 361,462	$ 370,361	$ 351,988	$ 352,238	$ 343,967	$ 346,704	$ 1,456,605	$ 1,394,897	$ 1,355,515
Income before income taxes		$ 46,215	$ 52,843	$ 41,376	$ 60,834	$ 47,657	$ 50,114	$ 41,224	$ 56,356	201,268	195,351	187,609
UNITED STATES
Note 15 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Revenues										1,333,864	1,258,609	1,223,534
Income before income taxes										188,704	182,354	171,899
Europe and Canada [Member]
Note 15 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Revenues	[1]									122,741	136,288	131,981
Europe, Canada, Mexico and Nicaragua [Member]
Note 15 - Segment Reporting (Details) - Summary of Revenues and Income Before Income Taxes by Geographic Area [Line Items]
Income before income taxes	[1]									$ 12,564	$ 12,997	$ 15,710

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