Stock-based Compensation - Performance Unit Awards - General Information (Details) - Performance Unit Awards $ / shares in Units, $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
$ / shares
| |
| Stock-based Compensation | |
| Performance period (in years) | 3 years |
| Estimated final value upon vesting | $ | $ 1.3 |
| Fair value | $ | $ 1.2 |
| Minimum | |
| Stock-based Compensation | |
| Vested (in dollars per share) | $ / shares | $ 0.00 |
| Maximum | |
| Stock-based Compensation | |
| Vested (in dollars per share) | $ / shares | $ 200.00 |