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								12 Months Ended
	Aug. 30, 2014	May 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	Jun. 01, 2013	Mar. 02, 2013	Dec. 01, 2012	Aug. 30, 2014	Aug. 31, 2013	Aug. 25, 2012
Earnings Per Share [Abstract]
Net income	$ 12,929	$ 11,385	$ 9,593	$ 11,146	$ 10,616	$ 7,661	$ 6,285	$ 7,391	$ 45,053	$ 31,953	$ 44,972
Weighted average shares outstanding									27,430	28,075	29,145
Net income per share - basic (in dollars per share)	$ 0.48	$ 0.42	$ 0.35	$ 0.40	$ 0.38	$ 0.27	$ 0.22	$ 0.26	$ 1.64	$ 1.14	$ 1.54
Dilutive impact of awards and options outstanding									115	95	62
Weighted average shares and potential dilutive shares outstanding									27,545	28,170	29,207
Net income per share - assuming dilution (in dollars per share)	$ 0.48	$ 0.42	$ 0.35	$ 0.40	$ 0.38	$ 0.27	$ 0.22	$ 0.26	$ 1.64	$ 1.13	$ 1.54