Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Aug. 31, 2013	Jun. 01, 2013	Mar. 02, 2013	Dec. 01, 2012	Sep. 01, 2012	May 26, 2012	Feb. 25, 2012	Nov. 26, 2011	Aug. 31, 2013	Sep. 01, 2012	Aug. 27, 2011
Net Income Per Share [Abstract]
Net income as reported	$ 56,375	$ 62,354	$ 56,079	$ 63,187	$ 68,915	$ 70,211	$ 60,068	$ 59,837	$ 237,995	$ 259,031	$ 218,786
Less: Distributed net income available to participating securities									(492)	(351)	(932)
Less: Undistributed net income available to participating securities									(1,289)	(1,758)	(948)
Undistributed and distributed net income available to common shareholders									236,214	256,922	216,906
Add: Undistributed net income allocated to participating securities									1,289	1,758	948
Less: Undistributed net income reallocated to participating securities									(1,283)	(1,748)	(942)
Undistributed and distributed net income available to common shareholders, diluted									$ 236,220	$ 256,932	$ 216,912
Weighted average shares outstanding for basic net income per share									62,695,000	62,434,000	62,902,000
Effect of dilutive securities									316,000	369,000	422,000
Weighted average shares outstanding for diluted net income per share									63,011,000	62,803,000	63,324,000
Net income per share, Basic	$ 0.89	$ 0.99	$ 0.89	$ 1.01	$ 1.10	$ 1.11	$ 0.95	$ 0.95	$ 3.77	$ 4.12	$ 3.45
Net income per share, Diluted	$ 0.89	$ 0.98	$ 0.88	$ 1.00	$ 1.09	$ 1.10	$ 0.95	$ 0.95	$ 3.75	$ 4.09	$ 3.43
Antidilutive stock options											5,000