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Loans and Allowance for Credit Losses - Loans by Type as Percentage of Portfolio (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,545,640	$ 1,410,653	$ 1,189,782
Allowance for loan losses (Note 3)	$ (16,552)	$ (15,685)	(7,619)	$ (7,688)
Percentage of allowance for credit losses	1.07%	1.11%
Loans, net	$ 1,529,088	$ 1,394,968
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 48,221	$ 49,210	64,159
Percentage of loans	3.12%	5.39%
Allowance for loan losses (Note 3)	$ (90)	$ (94)	(144)	(448)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 228,256	$ 229,915	210,210
Percentage of loans	14.77%	17.67%
Allowance for loan losses (Note 3)	$ (2,260)	$ (2,216)	(1,361)	(1,454)
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 901,130	$ 786,921	630,953
Percentage of loans	58.30%	53.03%
Allowance for loan losses (Note 3)	$ (9,460)	$ (8,820)	(4,822)	(3,705)
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 29,412	$ 36,541	39,808
Percentage of loans	1.90%	3.35%
Allowance for loan losses (Note 3)	$ (733)	$ (823)	(310)	(290)
Construction Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 17,042	$ 20,936	14,736
Percentage of loans	1.10%	1.24%
Allowance for loan losses (Note 3)	$ (59)	$ (58)	(63)	(110)
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 281,701	$ 267,730	229,916
Percentage of loans	18.23%	19.32%
Allowance for loan losses (Note 3)	$ (3,890)	$ (3,644)	(906)	(671)
Loans to Other Financial Institutions [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 39,878	$ 19,400	0
Percentage of loans	2.58%	0.00%
Allowance for loan losses (Note 3)	$ (60)	$ (30)	$ 0	$ 0

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