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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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- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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