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Loans Receivable and Allowance for Credit Losses (Composition of the Loan Portfolio) (Details) - USD ($) | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 1,771,682,000 | $ 1,714,082,000 |  |
Deferred fees, net | (413,000) | (444,000) |  |
Total loans receivable | 1,771,269,000 | 1,713,638,000 |  |
Allowance for credit losses | (20,442,000) | (19,843,000) | $ (18,020,000) | $ (18,968,000)
Net loans receivable | $ 1,750,827,000 | $ 1,693,795,000 |  |
Percent of Loans | 100.00% | 100.00% |  |
Residential Real Estate Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 330,288,000 | $ 330,856,000 |  |
Allowance for credit losses | $ (1,015,000) | $ (1,146,000) | (1,197,000) | (1,351,000)
Percent of Loans | 18.60% | 19.30% |  |
Commercial Real Estate Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 731,156,000 | $ 716,875,000 |  |
Allowance for credit losses | $ (10,585,000) | $ (11,406,000) | (9,831,000) | (11,871,000)
Percent of Loans | 41.30% | 41.80% |  |
Agricultural Real Estate Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 63,213,000 | $ 63,488,000 |  |
Percent of Loans | 3.60% | 3.70% |  |
Construction Real Estate Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 58,226,000 | $ 53,020,000 |  |
Allowance for credit losses | $ (985,000) | $ (884,000) | (831,000) | (933,000)
Percent of Loans | 3.30% | 3.10% |  |
Commercial Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 233,479,000 | $ 211,991,000 |  |
Allowance for credit losses | $ (1,972,000) | $ (1,732,000) | (1,987,000) | (1,207,000)
Percent of Loans | 13.20% | 12.40% |  |
Other Agricultural Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 27,637,000 | $ 30,077,000 |  |
Percent of Loans | 1.50% | 1.70% |  |
Consumer Loans [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Total Loans | $ 327,683,000 | $ 307,775,000 |  |
Allowance for credit losses | $ (5,635,000) | $ (4,465,000) | $ (3,922,000) | $ (3,454,000)
Percent of Loans | 18.50% | 18.00% |  |

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