Stock-based Compensation - Management Unit Awards - Additional Disclosures (Details) - Management Unit Awards - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Stock-based Compensation | ||
| Weighted average grant date fair value (in dollars per share) | $ 15.00 | $ 15.00 |
| Unrecognized expenses | $ 0.9 | |
| Weighted-average remaining recognition period (in years) | 1 year 3 months 18 days | |