Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||
| Stock-based compensation expense | $ 351 | $ 296 | $ 1,075 | $ 762 |