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Loans and ALLL (Summary of recorded investment in loans by segments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	$ 1,380	$ 911
Collectively evaluated for impairment, ALLL	7,891	8,833
Total, ALLL	9,271	9,744	$ 8,697	$ 7,939
Individually evaluated for impairment, Loans	33,895	27,936
Collectively evaluated for impairment, Loans	1,162,023	1,210,375
Total	1,195,918	1,238,311
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	587	84
Collectively evaluated for impairment, ALLL	1,112	2,078
Total, ALLL	1,699	2,162	2,375	1,914
Individually evaluated for impairment, Loans	14,300	9,821
Collectively evaluated for impairment, Loans	711,240	746,865
Total	725,540	756,686
Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	25	56
Collectively evaluated for impairment, ALLL	205	255
Total, ALLL	230	311	490	634
Individually evaluated for impairment, Loans	15,459	13,796
Collectively evaluated for impairment, Loans	76,170	86,665
Total	91,629	100,461
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	768	771
Collectively evaluated for impairment, ALLL	395	592
Total, ALLL	1,163	1,363	1,717	2,047
Individually evaluated for impairment, Loans	4,136	4,319
Collectively evaluated for impairment, Loans	301,773	303,224
Total	305,909	307,543
Total Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	0
Collectively evaluated for impairment, ALLL	956	798
Total, ALLL	956	798	961	922
Individually evaluated for impairment, Loans	0	0
Collectively evaluated for impairment, Loans	72,840	73,621
Total	72,840	73,621
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0	0
Collectively evaluated for impairment, ALLL	5,223	5,110
Total, ALLL	$ 5,223	$ 5,110	$ 3,154	$ 2,422

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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