Unaudited Quarterly Financial Data (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 02, 2013	Oct. 27, 2012	Jul. 28, 2012	Apr. 28, 2012	Jan. 28, 2012	Oct. 29, 2011	Jul. 30, 2011	Apr. 30, 2011	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Quarterly Financial Data [Line Items]
Net sales	$ 161,654	$ 135,537	$ 135,261	$ 147,945	$ 163,152	$ 152,135	$ 148,770	$ 156,040	$ 580,397	$ 620,097	$ 581,194
Gross margin	40,051	26,045	30,802	43,603	49,560	46,354	46,077	53,445	140,501	195,436	179,907
Net income	$ (85,810)	$ (14,779)	$ (12,369)	$ (273)	$ 1,123	$ 3,748	$ 2,198	$ 8,013	$ (113,231)	$ 15,082	$ 12,570
Net income (Loss) per share
Basic (in dollars per share)	$ (0.97)	$ (0.17)	$ (0.14)	$ 0.00	$ 0.01	$ 0.04	$ 0.02	$ 0.08	$ (1.28)	$ 0.16	$ 0.12
Diluted (in dollars per share)	$ (0.97)	$ (0.17)	$ (0.14)	$ 0.00	$ 0.01	$ 0.04	$ 0.02	$ 0.08	$ (1.28)	$ 0.16	$ 0.12
Weighted-average number of shares of common stock outstanding
Basic (in shares)	88,859,277	88,877,993	88,585,063	88,486,977	88,057,459	88,146,378	95,731,926	98,916,747	88,705,289	92,713,516	99,255,952
Diluted (in shares)	88,859,277	88,877,993	88,585,063	88,486,977	88,061,398	88,244,855	95,835,044	98,975,965	88,705,289	92,762,077	99,412,817
Common Stock Class A
Class A common stock market price data
High (in dollars per share)	$ 3.01	$ 3.29	$ 3.37	$ 3.69	$ 4.32	$ 5.04	$ 5.10	$ 4.55
Low (in dollars per share)	$ 2.66	$ 2.72	$ 2.66	$ 3.16	$ 3.08	$ 4.00	$ 3.85	$ 3.41