Stock-Based Compensation - Performance Restricted Stock Units (Details) - Performance Restricted Stock Units - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Number of Awards | ||
| Awards outstanding, beginning balance (in shares) | 59,623 | 0 |
| Issued (in shares) | 175,217 | 59,623 |
| Vested and restriction lapsed (in shares) | 0 | 0 |
| Forfeited (in shares) | 0 | 0 |
| Awards outstanding, ending balance (in shares) | 234,840 | 59,623 |
| Weighted Average Issue Price (in dollars per share) | ||
| Awards outstanding - beginning balance (in dollars per share) | $ 9.40 | $ 0.00 |
| Issued (in dollars per share) | 9.06 | 9.40 |
| Vested and restriction lapsed (in dollars per share) | 0.00 | 0.00 |
| Forfeited (in dollars per share) | 0.00 | 0.00 |
| Awards outstanding - ending balance (in dollars per share) | $ 9.15 | $ 9.40 |