Summary of Significant Accounting Policies - Property and Equipment, Net (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2015 | |
| Computer Equipment | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 3 years |
| Furniture and Fixtures | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 5 years |
| Building | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 40 years |