Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 27, 2016	Feb. 28, 2015	Feb. 27, 2016	Feb. 28, 2015
Net Income Per Share [Abstract]
Net income as reported	$ 49,525	$ 51,527	$ 104,554	$ 108,944
Less: Distributed net income available to participating securities	(80)	(115)	(169)	(1,348)
Less: Undistributed net income available to participating securities	(106)	(182)	(266)
Undistributed and distributed net income available to common shareholders: Basic	49,339	51,230	104,119	107,596
Add: Undistributed net income allocated to participating securities	106	182	266
Less: Undistributed net income reallocated to participating securities	(106)	(182)	(265)
Undistributed and distributed net income available to common shareholders: Diluted	$ 49,339	$ 51,230	$ 104,120	$ 107,596
Weighted average shares outstanding for basic net income per share	61,187	61,351	61,242	61,298
Effect of dilutive securities	126	215	119	256
Weighted average shares outstanding for diluted net income per share	61,313	61,566	61,361	61,554
Net income per share Two-class method: Basic	$ 0.81	$ 0.84	$ 1.70	$ 1.76
Net income per share Two-class method: Diluted	$ 0.80	$ 0.83	$ 1.70	$ 1.75
Antidilutive stock options	1,025	748	1,025	748