Defined Contribution Plan (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Defined Contribution Plan [Abstract] | |||
| Required time period for employees for profit sharing plan | 3 months | ||
| Maximum employer contribution as a percentage of employee contribution | 50.00% | ||
| Contribution expense recognized | $ 0.0 | $ 0.0 | $ 0.0 |
| Employer matching contribution amount | $ 1.1 | $ 0.9 | $ 0.7 |