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		6 Months Ended
	Mar. 02, 2013	Feb. 25, 2012	Mar. 02, 2013	Feb. 25, 2012
Earnings Per Share [Abstract]
Net income (loss)	$ 6,285	$ (912)	$ 13,676	$ 123
Weighted average shares outstanding	28,084	29,151	28,196	29,145
Net income (loss) per share - basic (in dollars per share)	$ 0.22	$ (0.03)	$ 0.49	$ 0.00
Dilutive impact of awards and options outstanding	107	97	84	86
Weighted average shares and potential dilutive shares outstanding	28,191	29,248	28,280	29,231
Net income (loss) per share - assuming dilution (in dollars per share)	$ 0.22	$ (0.03)	$ 0.48	$ 0.00