Net Loss Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012	Oct. 29, 2011
Net Loss Per Common Share [Abstract]
Net loss (a)	$ (3,675)	$ (6,350)	$ (16,259)	$ (39,736)
Weighted average number of common shares outstanding — Basic	48,931,464	48,472,205	48,807,749	45,752,867
Weighted average number of common shares outstanding — Diluted	48,931,464	48,472,205	48,807,749	45,752,867
Net loss per common share	$ (0.08)	$ (0.13)	$ (0.33)	$ (0.87)
Net loss per common share — assuming dilution	$ (0.08)	$ (0.13)	$ (0.33)	$ (0.87)
Gains (Losses) on Extinguishment of Debt	$ 0	$ 0	$ 500	$ 25,679
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	4,233,000	5,018,000	3,838,000	6,021,000