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Loans and Allowance for Credit Losses - Loans by Type as Percentage of Portfolio (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 1,503,950 | $ 1,410,653 |  |  |  |
Allowance for credit loss | $ 16,490 | $ 15,685 | $ 16,152 | $ 14,872 | $ 14,582 | $ 7,619
Percentage of allowance for credit losses | 1.10% | 1.11% |  |  |  |
Loans, net | $ 1,487,460 | $ 1,394,968 |  |  |  |
Agricultural [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 49,147 | $ 49,210 |  |  |  |
Percentage of loans | 3.30% | 3.50% |  |  |  |
Percentage of increase decrease of loans | (0.10%) |  |  |  |  |
Allowance for credit loss | $ 110 | $ 94 | 112 | 83 | 78 | 144
Commercial and Industrial [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 229,232 | $ 229,915 |  |  |  |
Percentage of loans | 15.20% | 16.30% |  |  |  |
Percentage of increase decrease of loans | (0.30%) |  |  |  |  |
Allowance for credit loss | $ 2,470 | $ 2,216 | 2,161 | 2,523 | 2,896 | 1,361
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 862,773 | $ 786,921 |  |  |  |
Percentage of loans | 57.40% | 55.80% |  |  |  |
Percentage of increase decrease of loans | 9.60% |  |  |  |  |
Allowance for credit loss | $ 9,220 | $ 8,820 | 9,360 | 8,145 | 7,237 | 4,822
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 30,693 | $ 36,541 |  |  |  |
Percentage of loans | 2.00% | 2.60% |  |  |  |
Percentage of increase decrease of loans | (16.00%) |  |  |  |  |
Allowance for credit loss | $ 761 | $ 823 | 795 | 826 | 885 | 310
Construction Real Estate [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 14,555 | $ 20,936 |  |  |  |
Percentage of loans | 1.00% | 1.50% |  |  |  |
Percentage of increase decrease of loans | (30.50%) |  |  |  |  |
Allowance for credit loss | $ 36 | $ 58 | 49 | 51 | 70 | 63
Residential Portfolio Segment [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 279,058 | $ 267,730 |  |  |  |
Percentage of loans | 18.60% | 19.00% |  |  |  |
Percentage of increase decrease of loans | 4.20% |  |  |  |  |
Allowance for credit loss | $ 3,833 | $ 3,644 | 3,625 | 3,204 | 3,376 | 906
Loans To Other Financial Institutions [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans | $ 38,492 | $ 19,400 |  |  |  |
Percentage of loans | 2.60% | 1.40% |  |  |  |
Percentage of increase decrease of loans | 98.40% |  |  |  |  |
Allowance for credit loss | $ 60 | $ 30 | $ 50 | $ 40 | $ 40 | $ 0

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