Share-Based Compensation - Unrecognized Compensation Expense and Period for Recognition (Details) $ in Millions |
9 Months Ended |
|---|---|
|
Oct. 29, 2016
USD ($)
| |
| Stock Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unrecognized share-based compensation expense | $ 2.8 |
| Period for recognition | 1 year 7 months 20 days |
| Restricted Stock Units and Restricted Stock [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unrecognized share-based compensation expense | $ 22.3 |
| Period for recognition | 1 year 8 months 26 days |