Goodwill - Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Goodwill [Roll Forward] | ||
| Goodwill balance, beginning of year | $ 38,019 | $ 20,317 |
| Goodwill balance, end of year | 311,865 | 38,019 |
| 6 River Systems, Inc. | ||
| Goodwill [Roll Forward] | ||
| Increase related to acquisitions | 264,527 | 0 |
| Tictail, Inc. | ||
| Goodwill [Roll Forward] | ||
| Increase related to acquisitions | 0 | 15,125 |
| Other acquisitions | ||
| Goodwill [Roll Forward] | ||
| Increase related to acquisitions | $ 9,319 | $ 2,577 |