Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 26, 2011	Nov. 27, 2010
Net Income Per Share [Abstract]
Net income as reported	$ 59,837	$ 47,560
Less: Distributed net income available to participating securities	(119)	(621)
Less: Undistributed net income available to participating securities	(418)
Undistributed and distributed net income available to common shareholders, basic	59,300	46,939
Add: Undistributed net income allocated to participating securities	418
Less: Undistributed net income reallocated to participating securities	(416)
Undistributed and distributed net income available to common shareholders, diluted	$ 59,302	$ 46,939
Weighted average shares outstanding for basic net income per share	62,285	62,370
Effect of dilutive securities	342	425
Weighted average shares outstanding for diluted net income per share	62,627	62,795
Net income per share, Basic	$ 0.95	$ 0.75
Net income per share, Diluted	$ 0.95	$ 0.75
Antidilutive stock options	310	0