Note 15 - Summary of Revenues and Income Before Income Taxes by Geographic Area (Details) - USD ($) $ in Thousands		3 Months Ended									12 Months Ended
		Aug. 27, 2016	[2]	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 30, 2015	Feb. 28, 2015	Nov. 29, 2014	Aug. 27, 2016	Aug. 29, 2015	Aug. 30, 2014
UNITED STATES
Revenues											$ 1,352,101	$ 1,333,864	$ 1,258,609
Income before income taxes											197,441	188,704	182,354
Europe and Canada [Member]
Revenues	[1]										115,945	122,741	136,288
Europe, Canada, Mexico, and Nicaragua [Member]
Income before income taxes	[1]										5,930	12,564	12,997
Revenues		$ 363,766		$ 367,799	$ 363,097	$ 373,384	$ 359,208	$ 365,574	$ 361,462	$ 370,361	1,468,046	1,456,605	1,394,897
Income before income taxes											$ 203,371	$ 201,268	$ 195,351

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

[2] In the fourth fiscal quarter of 2016, operating results benefited from a settlement of environmental litigation that resulted in the Company recording a $15.9 million pre-tax gain. This gain translated into a $0.48 benefit to the Company's diluted earnings per share.