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Income Tax, Components of Deferred Tax Asset and Liability (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Deferred Tax Assets, Gross [Abstract] |  |  |
Deferred Tax Asset, Allowance For Loan Loss | $ 1,411 | $ 1,102 |
Deferred Tax Asset, Bonus | 183 | 296 |
Deferred Tax Asset Right Of Use Liability | 204 | 198 |
Deferred Tax Assets, Other | 91 | 88 |
Deferred Tax Assets, Gross | 1,889 | 1,684 |
Deferred Tax Liabilities [Abstract] |  |  |
Deferred Tax Liabilities, Property, Plant and Equipment | 199 | 315 |
Deferred Tax Liabilities, Unrealized Gains on Available-for-Sale Securities, Gross | 2,548 | 690 |
Deferred Tax Liabilities, Originated Mortgage Servicing Rights | 334 | 326 |
Deferred Tax Liabilities, Right Of Use Asset | 198 | 197 |
Deferred Tax Liabilities, Other | 147 | 165 |
Deferred Income Tax Liabilities, Gross, Total | 3,426 | 1,693 |
Deferred Tax Assets (Liabilities), Net | $ (1,537) | $ (9) | $ 1,790

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