Goodwill and Intangible Assets (Amortization expense) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
|
| Amortization expense | ||
| Amortization of intangible assets | $ 1,230 | $ 934 |
| Cost of revenue | ||
| Amortization expense | ||
| Amortization of intangible assets | 774 | 649 |
| Research and development | ||
| Amortization expense | ||
| Amortization of intangible assets | 48 | 40 |
| Sales and marketing | ||
| Amortization expense | ||
| Amortization of intangible assets | $ 408 | $ 245 |