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Summary of Stock Option Activity (Detail) - USD ($)
 12 Months Ended
Jan. 31, 2016
Feb. 01, 2015
Feb. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Balance at February 1, 2015, shares 107,000    
Granted, shares 0 0 0
Exercised, shares (68,500)    
Cancelled, shares 0    
Balance at January 31, 2016 38,500 107,000  
Balance at February 1, 2015 weighted average exercise price $ 39.05    
Granted, weighted average exercise price 0    
Exercised, weighted average exercise price 38.64    
Cancelled, weighted average exercise price 0    
Balance at January 31, 2016,weighted average exercise price $ 39.80 $ 39.05  
Balance at January 31, 2016, weighted average contractual term remaining (years) 3 months 22 days    
Balance at January 31, 2016, intrinsic value [1] $ 457,000    
[1] Intrinsic value for outstanding and vested options is based on the excess of the market value of our common stock on the last business day of the fiscal year (or $51.66) over the exercise price.