Interim Financial Information (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Aug. 25, 2012	May 26, 2012	Feb. 25, 2012	Nov. 26, 2011	Aug. 27, 2011	May 28, 2011	Feb. 26, 2011	Nov. 27, 2010	Aug. 25, 2012	Aug. 27, 2011	Aug. 28, 2010
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 162,533	$ 155,709	$ 131,600	$ 131,837	$ 130,546	$ 135,568	$ 106,593	$ 123,711	$ 581,679	$ 496,418	$ 449,484
Gross profit	16,267	12,071	6,846	8,496	8,528	8,703	11,324	11,199	43,680	39,754	26,267
Operating income (loss)	6,536	3,527	(1,164)	627	1,766	538	4,050	4,925	9,526	11,279	520
Net income (loss)	$ 40,908	$ 3,941	$ (912)	$ 1,035	$ 3,547	$ 1,195	$ 3,315	$ 3,786	$ 44,972	$ 11,843	$ 10,247
Net income (loss) per share (basic) (in dollars per share)	$ 1.41	$ 0.13	$ (0.03)	$ 0.04	$ 0.12	$ 0.04	$ 0.11	$ 0.13	$ 1.54	$ 0.41	$ 0.35
Net income (loss) per share (diluted) (in dollars per share)	$ 1.41	$ 0.13	$ (0.03)	$ 0.04	$ 0.12	$ 0.04	$ 0.11	$ 0.13	$ 1.54	$ 0.41	$ 0.35