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Loans and Allowance for Credit Losses - Loans by Type as Percentage of Portfolio (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Jun. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,503,950	$ 1,410,653
Allowance for credit loss	$ 16,490	$ 15,685	$ 16,152	$ 14,872	$ 14,582	$ 7,619
Percentage of allowance for credit losses	1.10%	1.11%
Loans, net	$ 1,487,460	$ 1,394,968
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 49,147	$ 49,210
Percentage of loans	3.30%	3.50%
Percentage of increase decrease of loans	(0.10%)
Allowance for credit loss	$ 110	$ 94	112	83	78	144
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 229,232	$ 229,915
Percentage of loans	15.20%	16.30%
Percentage of increase decrease of loans	(0.30%)
Allowance for credit loss	$ 2,470	$ 2,216	2,161	2,523	2,896	1,361
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 862,773	$ 786,921
Percentage of loans	57.40%	55.80%
Percentage of increase decrease of loans	9.60%
Allowance for credit loss	$ 9,220	$ 8,820	9,360	8,145	7,237	4,822
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 30,693	$ 36,541
Percentage of loans	2.00%	2.60%
Percentage of increase decrease of loans	(16.00%)
Allowance for credit loss	$ 761	$ 823	795	826	885	310
Construction Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 14,555	$ 20,936
Percentage of loans	1.00%	1.50%
Percentage of increase decrease of loans	(30.50%)
Allowance for credit loss	$ 36	$ 58	49	51	70	63
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 279,058	$ 267,730
Percentage of loans	18.60%	19.00%
Percentage of increase decrease of loans	4.20%
Allowance for credit loss	$ 3,833	$ 3,644	3,625	3,204	3,376	906
Loans To Other Financial Institutions [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 38,492	$ 19,400
Percentage of loans	2.60%	1.40%
Percentage of increase decrease of loans	98.40%
Allowance for credit loss	$ 60	$ 30	$ 50	$ 40	$ 40	$ 0

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