Share-Based Compensation - Black Scholes Assumptions (Details) - Employee Stock Option |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected dividend yield | 0.00% | 0.00% | 0.00% |
| Risk-free interest rate, minimum | 1.50% | 1.90% | 0.90% |
| Risk-free interest rate, maximum | 2.00% | 2.20% | 2.10% |
| Expected volatility | 50.00% | 50.00% | 50.00% |
| Expected term | 6 years 3 months | ||
| Forfeitures | 5.68% | 5.68% | 5.68% |
| Minimum | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected term | 6 years 3 months | 5 years 9 months 26 days | |
| Maximum | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected term | 7 years 6 months | 8 years 9 months 26 days | |