Income Taxes (Schedule of unrecognized tax positions) (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |
| Balance at January 1 | $ 244 |
| Reductions for tax positions of prior years | (7) |
| Balance at December 31 | $ 237 |