Goodwill and Intangible Assets (Goodwill) (Details) $ in Thousands |
6 Months Ended |
|---|---|
|
Jun. 30, 2018
USD ($)
| |
| Business Combination - Goodwill | |
| Balance at beginning of the period | $ 21,867 |
| Measurement period adjustments | (37) |
| Foreign currency translation adjustment | (158) |
| Balance at end of the period | $ 21,672 |