Share-Based Compensation - Valuation Assumptions used for Fair Value of Stock Options (Details) - Stock Option [Member] |
9 Months Ended | |
|---|---|---|
Oct. 28, 2017 |
Oct. 29, 2016 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk-free interest rate (as a percent) | 2.27% | 1.60% |
| Price volatility (as a percent) | 45.53% | 43.15% |
| Expected term | 6 years 1 month 6 days | 6 years 6 months 15 days |
| Dividend yield | 0.00% | 0.00% |