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Loans and ACL (Summary of recorded investment in loans by segments) (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL		$ 451,000
Collectively evaluated for impairment, ALLL		9,399,000
Financing Receivable, Allowance for Credit Loss	$ 12,640,000	9,850,000	$ 9,204,000	$ 9,103,000
Individually evaluated for impairment, Loans		22,018,000
Collectively evaluated for impairment, Loans		1,242,155,000
Total		1,264,173,000
Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	451,000
Individually evaluated for impairment, Loans	280,000	22,018,000
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	817,000	860,000	1,245,000	1,740,000
Total		744,440,000
Commercial [Member] | Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	0
Individually evaluated for impairment, Loans	0	0
Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated for impairment, ALLL		577,000
Financing Receivable, Allowance for Credit Loss	265,000	577,000	383,000	289,000
Collectively evaluated for impairment, Loans		94,050,000
Total		104,985,000
Agricultural [Member] | Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	0
Individually evaluated for impairment, Loans	199,000	10,935,000
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated for impairment, ALLL		178,000
Financing Receivable, Allowance for Credit Loss		617,000	725,000	747,000
Collectively evaluated for impairment, Loans		333,953,000
Total		336,694,000
Total Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Collectively evaluated for impairment, ALLL		961,000
Financing Receivable, Allowance for Credit Loss	1,409,000	961,000	708,000	908,000
Collectively evaluated for impairment, Loans		78,054,000
Total		78,054,000
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL		0
Collectively evaluated for impairment, ALLL		6,374,000
Financing Receivable, Allowance for Credit Loss	0	6,374,000	$ 6,143,000	$ 5,419,000
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	4,113,000	617,000
Residential Real Estate | Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	439,000
Individually evaluated for impairment, Loans	81,000	2,741,000
Consumer Loan | Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	0
Individually evaluated for impairment, Loans	0	0
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	6,036,000	461,000
Commercial Real Estate | Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	12,000
Individually evaluated for impairment, Loans	$ 0
Commercial and Commercial Real Estate Portfolio Segment
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL		12,000
Collectively evaluated for impairment, ALLL		1,309,000
Financing Receivable, Allowance for Credit Loss		1,321,000
Collectively evaluated for impairment, Loans		736,098,000
Total		744,440,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total		566,012,000
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, Loans		$ 8,342,000

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