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Loans and Allowance for Credit Losses - Loans by Type as Percentage of Portfolio (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022 | Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 1,264,228 | $ 1,189,782 |  |  |  |
Allowance for loan losses (Note 3) | $ 14,582 | $ 7,619 | $ 15,065 | $ 7,416 | $ 7,601 | $ 7,688
Percentage of allowance for credit losses | 1.15% | 0.64% |  |  |  |
Loans, net | $ 1,249,646 | $ 1,182,163 |  |  |  |
Agricultural [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 40,684 | $ 64,159 |  |  |  |
Percentage of loans | 3.22% | 5.39% |  |  |  |
Percentage of increase decrease of loans | (36.59%) |  |  |  |  |
Allowance for loan losses (Note 3) | $ 78 | $ 144 | 136 | 132 | 387 | 448
Commercial and Industrial [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 224,191 | $ 210,210 |  |  |  |
Percentage of loans | 17.73% | 17.67% |  |  |  |
Percentage of increase decrease of loans | 6.65% |  |  |  |  |
Allowance for loan losses (Note 3) | $ 2,896 | $ 1,361 | 3,020 | 1,613 | 1,752 | 1,454
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 657,549 | $ 630,953 |  |  |  |
Percentage of loans | 52.01% | 53.03% |  |  |  |
Percentage of increase decrease of loans | 4.22% |  |  |  |  |
Allowance for loan losses (Note 3) | $ 7,237 | $ 4,822 | 7,837 | 4,224 | 3,690 | 3,705
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 38,614 | $ 39,808 |  |  |  |
Percentage of loans | 3.05% | 3.35% |  |  |  |
Percentage of increase decrease of loans | (3.00%) |  |  |  |  |
Allowance for loan losses (Note 3) | $ 885 | $ 310 | 913 | 309 | 304 | 290
Construction Real Estate [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 16,734 | $ 14,736 |  |  |  |
Percentage of loans | 1.32% | 1.24% |  |  |  |
Percentage of increase decrease of loans | 13.56% |  |  |  |  |
Allowance for loan losses (Note 3) | $ 70 | $ 63 | 72 | 45 | 37 | 110
Residential Portfolio Segment [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 247,618 | $ 229,916 |  |  |  |
Percentage of loans | 19.59% | 19.32% |  |  |  |
Percentage of increase decrease of loans | 7.70% |  |  |  |  |
Allowance for loan losses (Note 3) | $ 3,376 | $ 906 | $ 3,087 | $ 691 | $ 589 | $ 671
Loans To Other Financial Institutions [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Loans (Note 3) | $ 38,838 |  |  |  |  |
Percentage of loans | 3.07% | 0.00% |  |  |  |
Percentage of increase decrease of loans | 100.00% |  |  |  |  |
Allowance for loan losses (Note 3) | $ 40 |  |  |  |  |

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