Goodwill and Intangible Assets (Amortization expense) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
|
| Amortization expense | ||||
| Amortization of intangible assets | $ 1,321 | $ 1,238 | $ 2,551 | $ 2,172 |
| Cost of revenue | ||||
| Amortization expense | ||||
| Amortization of intangible assets | 791 | 817 | 1,565 | 1,466 |
| Research and development | ||||
| Amortization expense | ||||
| Amortization of intangible assets | 47 | 50 | 95 | 90 |
| Sales and marketing | ||||
| Amortization expense | ||||
| Amortization of intangible assets | $ 483 | $ 371 | $ 891 | $ 616 |