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Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Deferred Tax Assets: |  |
Net Unrealized Losses on Securities Available-for-Sale Included in Accumulated Other Comprehensive Income | $ 11,003 | $ 16,914
Allowance for Credit Losses | 8,475 | 8,199
Lease liabilities | 2,635 | 2,821
Pension and Deferred Compensation Plans | 3,708 | 3,571
Pension Liability Included in Accumulated Other Comprehensive Income | 1,210 | 1,692
Historic Tax Credit | 363 | 749
Other | 781 | 745
Total Gross Deferred Tax Assets | 28,175 | 34,691
Valuation Allowance for Deferred Tax Assets | 0 | 0
Total Gross Deferred Tax Assets, Net of Valuation Allowance | 28,175 | 34,691
Deferred Tax Liabilities: |  |
Pension Plans | 5,489 | 5,606
Depreciation | 5,094 | 3,165
ROU assets | 2,426 | 2,646
Deferred Income | 3,905 | 3,266
Net Unrealized Gains on Equity Securities | 207 | 272
Goodwill | 3,379 | 3,416
Gain on Cash Flow Hedge Agreements Included in Accumulated Other Comprehensive Income | 590 | 1,404
Total Gross Deferred Tax Liabilities | 21,090 | 19,775
Deferred Tax Asset, Net | $ 7,085 | $ 14,916

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