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Income Taxes Tax Reform (Textual) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Valuation Allowance [Line Items] |  |
Net tax benefit related to estimate of the provisions of the 2017 Tax Act | $ 54 |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | 7,818 |
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 2,958 | $ 754
Valuation Allowance, Deferred Tax Asset, Explanation of Change | 4,447 |
2017 Tax Cuts and Jobs Act [Member] |  |
Valuation Allowance [Line Items] |  |
Valuation Allowance, Deferred Tax Asset, Explanation of Change | 1,780 |
Transition Toll Tax [Member] |  |
Valuation Allowance [Line Items] |  |
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 1,935 |
Valuation Allowance, Deferred Tax Asset, Explanation of Change | 802 |
Federal statutory rate reduction from 35% to 21% [Member] |  |
Valuation Allowance [Line Items] |  |
Valuation Allowance, Deferred Tax Asset, Explanation of Change | $ 926 |

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