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Loans Receivable and Allowance for Credit Losses (Summary of Loan Concentrations by Industry) (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 1,815,138,000 | $ 1,714,082,000
Commercial Real Estate Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | 737,533,000 | 716,875,000
Commercial Real Estate Loans [Member] | Loans Receivable [Member] | Commercial Rentals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 169,560,000 |
Percent of Loans Outstanding | 9.38% |
Residential Real Estate Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 339,997,000 | 330,856,000
Residential Real Estate Loans [Member] | Loans Receivable [Member] | Residential Rentals [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 116,554,000 |
Percent of Loans Outstanding | 6.45% |
Consumer Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 346,897,000 | 307,775,000
Consumer Loans [Member] | Loans Receivable [Member] | Hotels/Motels [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 121,907,000 |
Percent of Loans Outstanding | 6.74% |
Consumer Loans [Member] | Loans Receivable [Member] | Dairy Cattle/Milk Product [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 43,253,000 |
Percent of Loans Outstanding | 2.39% |
Consumer Loans [Member] | Loans Receivable [Member] | Fuel/Gas Stations [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 48,924,000 |
Percent of Loans Outstanding | 2.71% |
Consumer Loans [Member] | Loans Receivable [Member] | Government Support [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 30,283,000 |
Percent of Loans Outstanding | 1.68% |
Consumer Loans [Member] | Loans Receivable [Member] | Mobile Home Park [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 21,723,000 |
Percent of Loans Outstanding | 1.20% |
Consumer Loans [Member] | Loans Receivable [Member] | Wineries [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 20,542,000 |
Percent of Loans Outstanding | 1.14% |
Consumer Loans [Member] | Loans Receivable [Member] | Camps [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 23,336,000 |
Percent of Loans Outstanding | 1.29% |
Consumer Loans [Member] | Loans Receivable [Member] | Resorts [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 38,294,000 |
Percent of Loans Outstanding | 2.12% |
Construction Real Estate Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 80,311,000 | $ 53,020,000
Construction Real Estate Loans [Member] | Loans Receivable [Member] | Builders/Contractors [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Outstanding Loans | $ 36,702,000 |
Percent of Loans Outstanding | 2.03% |

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