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Share-Based Compensation Arrangements - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jun. 04, 2013
Jan. 30, 2016
Jan. 30, 2016
Jan. 31, 2015
Feb. 01, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total stock-based compensation expense     $ 3,773,000 $ 2,772,000 $ 2,830,000
Maximum contractual terms 10 years        
Options to purchase outstanding common stock   1,055,568 1,055,568 1,371,785  
Restricted stock units outstanding   225,885 225,885 231,500  
Shares reserved for future stock-based grants   1,128,087 1,128,087    
Cash dividends paid on common stock     $ 25,951,000 $ 0 0
Restricted stock units granted     107,000    
Restricted stock units, fair value grant prices per share     $ 25.52    
Maximum Employee Contribution Percent     6.00%    
Percentage of Employee's Contribution Matched by Company     50.00%    
Company's matching contributions     $ 521,000 457,000 383,000
Company's additional contributions on behalf of employees     0 0 0
Company's matching contributions     63,000 52,000 62,000
Restricted Stock Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total stock-based compensation expense     $ 2,000,000 $ 1,300,000 $ 1,300,000
Options exercise prices, Lower limit     $ 15.79    
Options exercise prices, Upper limit     $ 25.52    
Expected period to recognize unvested stock options as stock compensation expense     1 year 3 months 18 days    
Restricted Stock Units Granted to Directors and Vested on First Anniversary of Grant Date     100.00%    
Percentage of Restricted Stock Units Granted to Employees vested on Third Anniversary of Grant date     100.00%    
Restricted stock units granted     107,000 97,000 104,000
Restricted stock units, fair value grant prices per share     $ 25.52 $ 18.46 $ 15.79
Unrecognized compensation expense related to RSUs   $ 2,300,000 $ 2,300,000    
In Money Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options to purchase outstanding common stock   463,194 463,194    
Intrinsic value of in-the-money options outstanding   $ 1,600,000 $ 1,600,000    
Aggregate Intrinsic value options exercisable   1,600,000 $ 1,600,000    
Weighted average grant, fair values of options granted     $ 12.06 $ 9.68 $ 9.51
Intrinsic value of options exercised     $ 6,100,000 $ 200,000 $ 2,600,000
Unrecognized stock compensation expense   $ 3,100,000 $ 3,100,000    
Expected period to recognize unvested stock options as stock compensation expense   2 years 1 month 6 days      
Employee Stock Purchase Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum shares of common stock award   500,000 500,000    
Payroll deduction of the fair market value     85.00%    
Shares of common stock issued     19,423 19,062 19,478
Shares remaining under the original authorization     13,169    
Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum shares of common stock award 3,500,000        
Options issued to employees, Vested term 4 years        
Options exercise prices, Upper limit     $ 25.52    
Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options issued to employees, Vested term 3 years        
Options exercise prices, Lower limit     $ 1.11    
Chief Executive Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation accelerated expense     $ 600,000