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Shareholders' Equity (Deficit) Preferred Stock - Additional Information (Detail) (USD $)
1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended
Jul. 17, 2012
May 04, 2013
Apr. 28, 2012
Feb. 02, 2013
Jan. 28, 2012
Jan. 29, 2011
Jul. 24, 2012
Series A 8% Percent Convertible Preferred Stock [Member]
May 16, 2012
Series A 8% Percent Convertible Preferred Stock [Member]
Oct. 14, 2010
Series A 8% Percent Convertible Preferred Stock [Member]
Class of Stock [Line Items]                  
Preferred Stock, shares issued (shares)   0 89,291,773 0 89,291,773       89,291,773
Preferred stock dividend, percentage 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00% 8.00%  
Proceeds from issuance of convertible preferred stock       $ 0 $ 0 $ 191,855,000     $ 191,900,000
Stock issuance costs                 $ 2,100,000
Dividends payable (dollars per share)             $ 2.17    
Preferred Stock converted into common stock (shares)             30,894,953