Goodwill and Intangible Assets (Amortization) (Details) - USD ($) $ in Thousands |
Mar. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Amortization of finite-lived intangible assets | ||
| Remainder of 2018 | $ 4,124 | |
| 2019 | 5,514 | |
| 2020 | 4,598 | |
| 2021 | 2,254 | |
| 2022 | 2,093 | |
| Thereafter | 6,044 | |
| Intangible assets, net | $ 24,627 | $ 26,081 |