Earnings Per Share (Calculation of Basic and Diluted Income Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Nov. 30, 2013	Dec. 01, 2012
Earnings Per Share [Abstract]
Net income	$ 11,146	$ 7,391
Weighted average shares outstanding	27,851	28,301
Net income per share - basic (in dollars per share)	$ 0.40	$ 0.26
Dilutive impact of awards and options outstanding	120	60
Weighted average shares and potential dilutive shares outstanding	27,971	28,361
Net income per share - assuming dilution (in dollars per share)	$ 0.40	$ 0.26