Interim Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 29, 2015	May. 30, 2015	Feb. 28, 2015	Nov. 29, 2014	Aug. 30, 2014	May. 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 29, 2015	Aug. 30, 2014	Aug. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 251,049	$ 266,510	$ 234,543	$ 224,403	$ 245,935	$ 247,747	$ 228,811	$ 222,670	$ 976,505	$ 945,163	$ 803,165
Gross profit	28,053	28,183	24,258	24,386	28,709	26,481	22,845	25,962	104,880	103,997	84,631
Operating income (loss)	16,911	16,118	11,948	14,442	18,278	15,589	14,036	16,006	59,419	63,909	44,398
Net income	$ 11,717	$ 11,502	$ 8,096	$ 9,895	$ 12,929	$ 11,385	$ 9,593	$ 11,146	$ 41,210	$ 45,053	$ 31,953
Net income (loss) per share (basic) (in dollars per share)	$ 0.43	$ 0.43	$ 0.30	$ 0.37	$ 0.48	$ 0.42	$ 0.35	$ 0.40	$ 1.53	$ 1.64	$ 1.14
Net income (loss) per share (diluted) (in dollars per share)	$ 0.43	$ 0.43	$ 0.30	$ 0.37	$ 0.48	$ 0.42	$ 0.35	$ 0.40	$ 1.52	$ 1.64	$ 1.13