Goodwill and Intangible Assets (Goodwill) (Details) $ in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
USD ($)
| |
| Business Combination - Goodwill | |
| Balance at beginning of the period | $ 21,867 |
| Foreign currency translation adjustment | 39 |
| Balance at end of the period | $ 21,828 |