Employee Benefit Plans - Restricted Stock Activity (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Employee Benefit Plans | |||
| Compensation cost | $ 9,000 | $ 7,500 | $ 3,600 |
| Restricted stock | |||
| Employee Benefit Plans | |||
| Compensation cost | 88 | 118 | 84 |
| Unrecognized compensation cost | $ 43 | $ 132 | $ 265 |
| Period for recognition | 3 years | ||
| Shares | |||
| Unvested restricted stock, beginning balance (in shares) | 204,444 | ||
| Vested (in shares) | (191,111) | ||
| Unvested restricted stock, end balance (in shares) | 13,333 | 204,444 | |
| Aggregate Intrinsic Value | |||
| Unvested restricted stock aggregate intrinsic value | $ 16 | ||
| Restricted stock | Minimum | |||
| Employee Benefit Plans | |||
| Vesting period | 1 year | ||
| Restricted stock | Maximum | |||
| Employee Benefit Plans | |||
| Vesting period | 3 years | ||