Note 4 - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Aug. 27, 2016	[1]	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
Current:
Federal										$ 54,654	$ 65,656	$ 54,005
Foreign										1,672	3,350	3,480
State										9,996	11,184	9,216
Total current										66,322	80,190	66,701
Deferred:
Federal										10,803	(2,705)	6,838
Foreign										(217)	34	59
State										1,437	(550)	1,828
Total deferred										12,023	(3,221)	8,725
Total	$ 21,821		$ 18,555	$ 15,501	$ 22,468	$ 17,274	$ 20,344	$ 15,930	$ 23,421	$ 78,345	$ 76,969	$ 75,426

[1] 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.