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Loans and Allowance for Credit Losses - Aging Analysis of Loans by Loan Category (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | $ 1,264,228 | $ 1,189,782
Loan 90 days and accruing |  | 0 | 0
Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 40,684 | 64,159
Loan 90 days and accruing |  | 0 | 0
Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 224,191 | 210,210
Loan 90 days and accruing |  | 0 | 0
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 38,614 | 39,808
Loan 90 days and accruing |  | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 657,549 | 630,953
Loan 90 days and accruing |  | 0 | 0
Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 16,734 | 14,736
Loan 90 days and accruing |  | 0 | 0
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 247,618 | 229,916
Loan 90 days and accruing |  |  | 0
Loans To Other Financial Institutions [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 38,838 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 1,349 | 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] | 61 |
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 5 | 39
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 1,059 |
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 224 | 682
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 913 | 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] | 132 | 171
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 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] | 128 |
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 653 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 560 | 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] | 560 | 842
Financial Asset, Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 2,822 | 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] | 193 | 171
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 5 | 46
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 1,059 |
Financial Asset, Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 128 |
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 1,437 | 1,524
Financial Asset, Not Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 1,261,406 | 1,188,041
Financial Asset, Not Past Due [Member] | Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 40,684 | 64,159
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 223,998 | 210,039
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 38,609 | 39,762
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 656,490 | 630,953
Financial Asset, Not Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 16,606 | 14,736
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 246,181 | $ 228,392
Financial Asset, Not Past Due [Member] | Loans To Other Financial Institutions [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | $ 38,838 |
[1] | Includes nonaccrual loans.

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