Loans, Major Classifications of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	$ 1,394,830	$ 1,401,278
Allowance for loan losses	7,858	5,646	$ 5,530	$ 5,506
Total	1,386,972	1,395,632
Loans and Leases Receivable, Net of Deferred Income	1,394,830	1,401,278
Loans and Leases Receivable, Deferred Income	865	980
Commercial and industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	124,354	120,327
Allowance for loan losses	1,047	1,300	1,297	1,095
Loans and Leases Receivable, Net of Deferred Income	124,354	120,327
Commercial, secured by real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	930,506	936,255
Allowance for loan losses	4,927	3,609	3,494	3,607
Loans and Leases Receivable, Net of Deferred Income	930,506	936,255
Residential real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	303,610	306,128
Allowance for loan losses	1,351	624	639	665
Loans and Leases Receivable, Net of Deferred Income	303,610	306,128
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	28,745	28,414
Allowance for loan losses	526	86	73	105
Loans and Leases Receivable, Net of Deferred Income	28,745	28,414
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	7,553	10,073
Allowance for loan losses	7	22	18	30
Loans and Leases Receivable, Net of Deferred Income	7,553	10,073
Other loans, including deposit overdrafts [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans gross	62	81
Allowance for loan losses	0	5	$ 9	$ 4
Loans and Leases Receivable, Net of Deferred Income	$ 62	$ 81