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Nature of Banking Activities and Significant Accounting Policies (Narrative) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Jun. 21, 2023 | May 16, 2023
Property Plant And Equipment [Line Items] |  |  |  |
Ownership percentage in subsidiaries | 100.00% |  |  |
Accrued interest receivable | $ 4,600,000 | $ 3,500,000 |  |
Sale of Non Mortgage Loans | $ 59,600,000 |  |  |
Limit of the estimated appraised value of the furnished home | 80.00% |  |  |
Reserve credit losses for Unfunded Commitments | $ 479,000 | $ 65,000 |  |
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method | 2,500,000 |  |  |
initial adjustment for the adoption of credit losses for Unfunded Commitments | 406,000 |  |  |
Provision for Other Credit Losses | $ 8,000 |  |  |
Stock incentive plan, authorized common stock |  |  |  | 250,000
"More likely than not" threshold | 50.00% |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 0 | 0 |  |
Number of shares of common stock able to be repurchased |  |  | 150,000 |
Shares repurchase and Moved | 8,531 | 4,442 |  |
Stock Repurchased and Retired During Period, Value | $ 35.34 | $ 34.79 |  |
Maximum numbers of shares that may yet be purchased under plan | 145,059 |  |  |
Derivatives used in Net Investment Hedge, Net of Tax | $ 2,000,000 |  |  |
Building [Member] | Minimum |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Estimated useful lives | 10 years |  |  |
Building [Member] | Maximum |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Estimated useful lives | 39 years |  |  |
Furniture and equipment [Member] | Minimum |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Estimated useful lives | 3 years |  |  |
Furniture and equipment [Member] | Maximum |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Estimated useful lives | 10 years |  |  |

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