Income Taxes (Narrative) (Details) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Income Tax Disclosure [Abstract] | ||||
| Impact related to uncertain tax positions from the results of operations | $ 0 | $ 0 | $ 0 | |
| Interest expense or penalties related to unrecognized tax benefits | $ 0 | |||