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Summary of Stock Option Activity (Detail) (USD $)
 12 Months Ended
Feb. 01, 2015
Feb. 02, 2014
Feb. 03, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Balance at February 2, 2014, shares 222,488us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber    
Granted, shares 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Exercised, shares (115,488)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised    
Cancelled, shares 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod    
Balance at February 1, 2015, shares 107,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 222,488us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Balance at February 2, 2014, weighted average exercise price $ 37.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice    
Granted, weighted average exercise price $ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice    
Exercised, weighted average exercise price $ 35.30us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice    
Cancelled, weighted average exercise price $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice    
Balance at February 1, 2015,weighted average exercise price $ 39.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 37.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Balance at February 2, 2014, weighted average contractual term remaining (years) 9 months 22 days    
Balance at February 2, 2014, intrinsic value $ 4,194,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue [1]    
[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 $78.25) over the exercise price.