Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2017 |
Sep. 30, 2017 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Total equity based compensation expense | $ 3,825 | $ 9,420 |
| Restricted stock awards | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Total equity based compensation expense | 1,490 | 3,364 |
| Stock option awards | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Total equity based compensation expense | 2,104 | 5,825 |
| Performance stock units | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Total equity based compensation expense | $ 231 | $ 231 |