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Income Tax, Components of Deferred Tax Asset and Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Deferred Tax Assets, Gross [Abstract] |  |  |
Deferred Tax Asset, Allowance For Loan Loss | $ 1,195 | $ 1,713 |
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross | 190 | 414 |
Deferred Tax Assets, Other Real Estate Owned Write-downs | 0 | 0 |
Deferred Tax Assets, Tax Credit Carryforwards, Other | 0 | 0 |
Deferred Tax Assets, Other | 216 | 316 |
Deferred Tax Assets, Gross | 1,601 | 2,443 |
Deferred Tax Liabilities [Abstract] |  |  |
Deferred Tax Liabilities, Property, Plant and Equipment | 241 | 205 |
Deferred Tax Liabilities, Unrealized Gains on Available-for-Sale Securities, Gross | 0 | 0 |
Deferred Tax Liabilities, Originated Mortgage Servicing Rights | 413 | 721 |
Deferred Tax Liabilities, Other | 158 | 237 |
Deferred Income Tax Liabilities, Gross, Total | 812 | 1,163 |
Deferred Tax Assets (Liabilities), Net | $ 789 | $ 1,280 | $ 195

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