Share-Based Compensation - Unrecognized Compensation Expense and Period for Recognition (Details) $ in Millions |
9 Months Ended |
|---|---|
|
Nov. 03, 2018
USD ($)
| |
| Restricted Stock Units (RSUs) [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unrecognized share-based compensation expense | $ 23.0 |
| Period for recognition | 1 year 8 months 26 days |
| Stock Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unrecognized share-based compensation expense | $ 1.5 |
| Period for recognition | 1 year 4 months 20 days |