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Loans and ALLL (Summary of recorded investment in loans by segments) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, ALLL	$ 911	$ 1,114
Collectively evaluated for impairment, ALLL	8,833	6,825
Total, ALLL	9,744	7,939	$ 8,375
Individually evaluated for impairment, Loans	27,936	28,191
Collectively evaluated for impairment, Loans	1,210,375	1,158,379
Total	1,238,311	1,186,570
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, ALLL	84	15
Collectively evaluated for impairment, ALLL	2,078	1,899
Total, ALLL	2,162	1,914	2,563
Individually evaluated for impairment, Loans	9,821	7,865
Collectively evaluated for impairment, Loans	746,865	693,076
Total	756,686	700,941
Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, ALLL	56	26
Collectively evaluated for impairment, ALLL	255	608
Total, ALLL	311	634	775
Individually evaluated for impairment, Loans	13,796	14,840
Collectively evaluated for impairment, Loans	86,665	102,080
Total	100,461	116,920
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, ALLL	771	1,073
Collectively evaluated for impairment, ALLL	592	974
Total, ALLL	1,363	2,047	1,992
Individually evaluated for impairment, Loans	4,319	5,486
Collectively evaluated for impairment, Loans	303,224	293,083
Total	307,543	298,569
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, ALLL	0	0
Collectively evaluated for impairment, ALLL	798	922
Total, ALLL	798	922	857
Individually evaluated for impairment, Loans	0	0
Collectively evaluated for impairment, Loans	73,621	70,140
Total	73,621	70,140
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment, ALLL	0	0
Collectively evaluated for impairment, ALLL	5,110	2,422
Total, ALLL	$ 5,110	$ 2,422	$ 2,188

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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