Basis of Presentation - Prior Period Reclassifications (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Basis Of Presentation And Significant Accounting Policies [Line Items] | |||||
| General and administrative expense | $ 7,498 | $ 9,258 | $ 23,450 | $ 27,841 | |
| Product development expense | 4,652 | 6,936 | 15,614 | 20,543 | |
| Sales and marketing expense | 6,031 | 5,602 | 19,610 | 15,343 | |
| Cost of services | 5,370 | 9,597 | 19,887 | 29,296 | |
| Other income, net | (31) | 178 | 39,131 | 3,024 | |
| Property and equipment, net | $ 11,929 | $ 11,929 | $ 14,568 | ||
| Reclassification | |||||
| Basis Of Presentation And Significant Accounting Policies [Line Items] | |||||
| General and administrative expense | (600) | (2,400) | |||
| Product development expense | 400 | 1,600 | |||
| Sales and marketing expense | 200 | 500 | |||
| Cost of services | 100 | 200 | |||
| Depreciation | 600 | ||||
| Other income, net | (500) | ||||
| Property and equipment, net | $ (1,100) | $ (1,100) | |||