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Net Income Per Share - Additional Information (Detail) (Nonparticipating Securities - Stock Options)
3 Months Ended 9 Months Ended
Nov. 01, 2014
Nov. 02, 2013
Nov. 01, 2014
Nov. 02, 2013
Nonparticipating Securities - Stock Options
       
Earnings Per Share Disclosure        
Antidilutive securities excluded from the computations of earnings per share 0 585,250 8,000 698,040