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Loans and Allowance for Credit Losses - Aging Analysis of Loans by Loan Category (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022
--- | --- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | $ 1,210,583 | $ 1,189,782 | $ 1,027,406
Loan 90 days and accruing |  | 0 | 0 |
Agricultural [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 55,995 | 64,159 | 61,618
Loan 90 days and accruing |  | 0 | 0 |
Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 217,063 | 210,210 | 198,914
Loan 90 days and accruing |  | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 38,891 | 39,808 | 36,151
Loan 90 days and accruing |  | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 648,202 | 630,953 | 537,252
Loan 90 days and accruing |  | 0 | 0 |
Construction Real Estate [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 13,939 | 14,736 | 15,669
Loan 90 days and accruing |  | 0 | 0 |
Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 236,493 | 229,916 | $ 177,802
Loan 90 days and accruing |  |  | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 2,860 | 721 |
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 174 |  |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 3 | 39 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 267 |  |
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 2,416 | 682 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 317 | 178 |
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 | 171 |
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 27 | 7 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 290 |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 153 | 842 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agricultural [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Real Estate [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 153 | 842 |
Financial Asset, Past Due [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 3,330 | 1,741 |
Financial Asset, Past Due [Member] | Agricultural [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Past Due [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 174 | 171 |
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 30 | 46 |
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 0 |  |
Financial Asset, Past Due [Member] | Construction Real Estate [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 267 |  |
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans | [1] | 2,859 | 1,524 |
Financial Asset, Not Past Due [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 1,207,253 | 1,188,041 |
Financial Asset, Not Past Due [Member] | Agricultural [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 55,995 | 64,159 |
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 216,889 | 210,039 |
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 38,861 | 39,762 |
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 648,202 | 630,953 |
Financial Asset, Not Past Due [Member] | Construction Real Estate [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | 13,672 | 14,736 |
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] |  |  |  |
Financing Receivable, Past Due [Line Items] |  |  |  |
Loans |  | $ 233,634 | $ 228,392 |
[1] | Includes nonaccrual loans.

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