Stock Based Compensation (Detail) - Summary of stock award activity (USD $)	6 Months Ended
	Jul. 28, 2012
Balance January 28, 2012	6,126,851
Balance January 28, 2012 (in Dollars per share)	$ 6.28
Balance January 28, 2012	3.6
Balance January 28, 2012	362,444	[1]
Balance January 28, 2012 (in Dollars per share)	$ 2.71
Granted	205,000
Granted (in Dollars per share)	$ 2.63
Granted	9.9
Exercised	(279,898)	[1]
Exercised (in Dollars per share)	$ 1.63
Exercised	(2,500)
Exercised (in Dollars per share)	$ 2.43
Forfeited	(150,000)
Forfeited (in Dollars per share)	$ 2.31
Canceled	(863,732)
Canceled (in Dollars per share)	$ 8.03
Balance July 28, 2012	5,315,619
Balance July 28, 2012 (in Dollars per share)	$ 5.88
Balance July 28, 2012	3.7
Balance July 28, 2012	82,546	[1]
Balance July 28, 2012 (in Dollars per share)	$ 6.35
Exercisable July 28, 2012	4,173,119
Exercisable July 28, 2012 (in Dollars per share)	$ 6.90
Exercisable July 28, 2012	2.4
Exercisable July 28, 2012	82,546	[1]
Exercisable July 28, 2012 (in Dollars per share)	$ 6.35

[1] Other Share Awards include deferred shares granted to Directors and restricted stock units issued to employees.