Benefit Plans (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Compensation and Retirement Disclosure [Abstract] | |||
| Employer match of employee contribution of the first 6% of the participant's contribution (as a percent) | 100.00% | ||
| Percentage of eligible compensation, matched by employer | 6.00% | ||
| Vesting schedule for employer's matching funds | 3 years | ||
| Matching contributions made by the subsidiary during the year | $ 0.9 | $ 0.7 | $ 0.7 |