Share-Based Compensation - Unrecognized Compensation Expense and Period for Recognition (Details) - Aug. 01, 2015 - USD ($) $ in Millions |
Total |
|---|---|
| Stock Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unrecognized share-based compensation expense | $ 4.6 |
| Period for recognition | 1 year 6 months 1 day |
| Restricted Stock Units and Restricted Stock [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unrecognized share-based compensation expense | $ 27.1 |
| Period for recognition | 2 years 1 month 2 days |