Stock-Based Compensation - Assumptions Used For Performance Shares (Details) - Performance stock units |
9 Months Ended |
|---|---|
|
Sep. 30, 2017
simulation
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of simulations | 1,000,000 |
| Expected stock volatility | 41.60% |
| Dividend yield | 0.00% |
| Risk-free interest rate | 1.50% |