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Income Taxes Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Deferred Tax Assets, Gross [Abstract] |  |
Allowance for Loan Losses | $ 5,131 | $ 4,730
Pension and Deferred Compensation Plans | 2,764 | 2,595
Pension Liability Included in Accumulated Other Comprehensive Income | 3,450 | 2,475
Other | 342 | 357
Deferred Tax Assets, Unrealized Losses on Trading Securities | 1,259 | 426
Total Gross Deferred Tax Assets | 12,946 | 10,583
Valuation Allowance for Deferred Tax Assets | 0 | 0
Total Gross Deferred Tax Assets, Net of Valuation Allowance | 12,946 | 10,583
Deferred Tax Liabilities, Gross [Abstract] |  |
Pension Plans | 5,502 | 5,487
Depreciation | 1,149 | 955
Deferred Income | 3,003 | 2,779
Net Unrealized Gains on Equity Securities | 166 | 0
Goodwill | 3,546 | 3,566
Total Gross Deferred Tax Liabilities | $ 13,366 | $ 12,787

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