Stock-Based Compensation - Assumptions Used For Stock Options (Details) - Stock option awards |
9 Months Ended |
|---|---|
|
Sep. 30, 2017
$ / shares
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Weighted average grant date fair value per share (in dollars per share) | $ 7.15 |
| Expected term (in years) | 6 years |
| Expected stock volatility | 38.10% |
| Dividend yield | 0.00% |
| Risk-free interest rate | 2.00% |