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Stock-Based Compensation - Additional Information (Detail)
$ in Millions
3 Months Ended
Apr. 30, 2016
USD ($)
shares
May. 02, 2015
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock unit vesting and settlement ratio to common shares 1  
Restricted-Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested restricted stock units | $ $ 9.5  
Weighted average period to recognize the total unrecognized compensation cost 1 year 11 months 22 days  
Time-based Restricted Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted-stock awards/units granted in period 169,000  
Performance-based Restricted Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted-stock awards/units granted in period 126,000  
Restricted stock units vesting period, years 3 years  
Restricted stock units required employee service period, years 3 years  
2010 Equity and Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Issuance of common stock shares 6,076,001  
2010 Equity and Incentive Plan [Member] | Restricted-Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted-stock awards/units granted in period 295,148 562,630
Restricted-stock awards/units with an aggregate grant-date fair value | $ $ 5.8 $ 9.1
Non-Employee Director [Member] | Restricted-Stock Units [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units vesting period, years 1 year