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Loans and Allowance for Credit Losses - Aging Analysis of Loans by Loan Category (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | $ 1,418,590 | $ 1,410,653
Loans, 90 Days Past Due and Accruing |  | 0 | 0
Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 41,950 | 49,210
Loans, 90 Days Past Due and Accruing |  | 0 | 0
Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 231,222 | 229,915
Loans, 90 Days Past Due and Accruing |  | 0 | 0
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 34,268 | 36,541
Loans, 90 Days Past Due and Accruing |  | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 794,705 | 786,921
Loans, 90 Days Past Due and Accruing |  | 0 | 0
Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 17,890 | 20,936
Loans, 90 Days Past Due and Accruing |  | 0 | 0
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 268,523 | 267,730
Loans, 90 Days Past Due and Accruing |  |  | 0
Loans To Other Financial Institutions [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 30,032 | 19,400
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 1,077 | 959
Financial Asset, 30 to 59 Days Past Due [Member] | Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 31 | 31
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 173 | 173
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 873 | 755
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 864 | 551
Financial Asset, 60 to 89 Days Past Due [Member] | Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 94 | 2
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 770 | 549
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 130 | 871
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 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 | 1
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 4 | 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 | 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 | 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] | 126 | 870
Financial Asset, Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 2,071 | 2,381
Financial Asset, Past Due [Member] | Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, Past Due [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 1
Financial Asset, Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 129 | 33
Financial Asset, Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 173 | 173
Financial Asset, Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 0 | 0
Financial Asset, Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans | [1] | 1,769 | 2,174
Financial Asset, Not Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 1,416,519 | 1,408,272
Financial Asset, Not Past Due [Member] | Agricultural [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 41,950 | 49,210
Financial Asset, Not Past Due [Member] | Commercial and Industrial [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 231,222 | 229,914
Financial Asset, Not Past Due [Member] | Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 34,139 | 36,508
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 794,532 | 786,748
Financial Asset, Not Past Due [Member] | Construction Real Estate [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 17,890 | 20,936
Financial Asset, Not Past Due [Member] | Residential Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | 266,754 | 265,556
Financial Asset, Not Past Due [Member] | Loans To Other Financial Institutions [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans |  | $ 30,032 | $ 19,400
[1] | Includes nonaccrual loans.

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