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Stock-Based Compensation - Additional Information (Detail)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 29, 2016
USD ($)
shares
Oct. 31, 2015
USD ($)
shares
Oct. 29, 2016
USD ($)
shares
Oct. 31, 2015
USD ($)
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 | $ $ 7.5   $ 7.5  
Weighted average period to recognize the total unrecognized compensation cost     1 year 7 months  
Time-based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted-stock awards/units granted in period     234,000  
Performance-based Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted-stock awards/units granted in period     180,000  
Restricted stock units vesting 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   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 11,325 4,533 413,457 603,164
Restricted-stock awards/units with an aggregate grant-date fair value | $ $ 0.2 $ 0.1 $ 7.6 $ 9.6
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