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Net Income Per Share - Additional Information (Detail) (Nonparticipating Securities - Stock Options)
3 Months Ended 6 Months Ended
Aug. 02, 2014
Aug. 03, 2013
Aug. 02, 2014
Aug. 03, 2013
Nonparticipating Securities - Stock Options
       
Earnings Per Share Disclosure        
Antidilutive securities excluded from the computations of earnings per share 0 710,200 12,000 754,435