Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 01, 2018	Dec. 02, 2017
Net Income Per Share [Abstract]
Net income as reported	$ 74,232	$ 59,585
Less: Distributed net income available to participating securities	(20)	(34)
Less: Undistributed net income available to participating securities	(33)	(69)
Undistributed and distributed net income available to common shareholders	74,179	59,482
Add: Undistributed net income allocated to participating securities	33	69
Less: Undistributed net income reallocated to participating securities	(33)	(69)
Undistributed and distributed net income available to common shareholders	$ 74,179	$ 59,482
Weighted average shares outstanding for basic net income per share	55,502	56,287
Effect of dilutive securities	329	217
Weighted average shares outstanding for diluted net income per share	55,831	56,504
Basic	$ 1.34	$ 1.06
Diluted	$ 1.33	$ 1.05
Potentially dilutive securities	408	957