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Loans and ALLL (Summary of recorded investment in loans by segments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	$ 583		$ 911
Collectively evaluated for impairment, ALLL	8,510		8,833
Total, ALLL	9,093	$ 9,360	9,744	$ 9,506	$ 8,877	$ 7,939
Individually evaluated for impairment, Loans	29,668		27,936
Collectively evaluated for impairment, Loans	1,218,890		1,210,375
Total	1,248,558		1,238,311
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	21		84
Collectively evaluated for impairment, ALLL	1,510		2,078
Total, ALLL	1,531	2,311	2,162	1,945	2,121	1,914
Individually evaluated for impairment, Loans	11,563		9,821
Collectively evaluated for impairment, Loans	746,430		746,865
Total	757,993		756,686
Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0		56
Collectively evaluated for impairment, ALLL	466		255
Total, ALLL	466	248	311	342	356	634
Individually evaluated for impairment, Loans	14,623		13,796
Collectively evaluated for impairment, Loans	79,159		86,665
Total	93,782		100,461
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	562		771
Collectively evaluated for impairment, ALLL	195		592
Total, ALLL	757	954	1,363	1,306	1,193	2,047
Individually evaluated for impairment, Loans	3,482		4,319
Collectively evaluated for impairment, Loans	318,138		303,224
Total	321,620		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	849		798
Total, ALLL	849	938	798	855	825	922
Individually evaluated for impairment, Loans	0		0
Collectively evaluated for impairment, Loans	75,163		73,621
Total	75,163		73,621
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0		0
Collectively evaluated for impairment, ALLL	5,490		5,110
Total, ALLL	$ 5,490	$ 4,909	$ 5,110	$ 5,058	$ 4,382	$ 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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