Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 01, 2012	May 26, 2012	Feb. 25, 2012	Nov. 26, 2011	Aug. 27, 2011	May 28, 2011	Feb. 26, 2011	Nov. 27, 2010	Sep. 01, 2012	Aug. 27, 2011	Aug. 28, 2010
Net Income Per Share [Abstract]
Net income as reported	$ 68,915	$ 70,211	$ 60,068	$ 59,837	$ 59,451	$ 62,086	$ 49,689	$ 47,560	$ 259,031	$ 218,786	$ 150,373
Less: Distributed net income available to participating securities									(351)	(932)	(411)
Less: Undistributed net income available to participating securities									(1,758)	(948)	(960)
Undistributed and distributed net income available to common shareholders									256,922	216,906	149,002
Add: Undistributed net income allocated to participating securities									1,758	948	960
Less: Undistributed net income reallocated to participating securities									(1,748)	(942)	(953)
Undistributed and distributed net income available to common shareholders, diluted									$ 256,932	$ 216,912	$ 149,009
Weighted average shares outstanding for basic net income per share									62,434,000	62,902,000	62,438,000
Effect of dilutive securities									369,000	422,000	492,000
Weighted average shares outstanding for diluted net income per share									62,803,000	63,324,000	62,930,000
Net income per share, Basic	$ 1.10	$ 1.11	$ 0.95	$ 0.95	$ 0.93	$ 0.97	$ 0.78	$ 0.75	$ 4.12	$ 3.45	$ 2.39
Net income per share, Diluted	$ 1.09	$ 1.10	$ 0.95	$ 0.95	$ 0.93	$ 0.97	$ 0.78	$ 0.75	$ 4.09	$ 3.43	$ 2.37
Antidilutive stock options										5,000