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Loans and ALLL (Summary of recorded investment in loans by segments) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	$ 950		$ 1,114
Collectively evaluated for impairment, ALLL	7,927		6,825
Total, ALLL	8,877	$ 8,697	7,939	$ 8,037	$ 8,398	$ 8,375
Individually evaluated for impairment, Loans	26,352		28,191
Collectively evaluated for impairment, Loans	1,258,033		1,158,379
Total	1,284,385		1,186,570
Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	63		15
Collectively evaluated for impairment, ALLL	2,058		1,899
Total, ALLL	2,121	2,375	1,914	2,080	2,248	2,563
Individually evaluated for impairment, Loans	8,235		7,865
Collectively evaluated for impairment, Loans	791,397		693,076
Total	799,632		700,941
Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	63		26
Collectively evaluated for impairment, ALLL	293		608
Total, ALLL	356	490	634	612	775	775
Individually evaluated for impairment, Loans	13,191		14,840
Collectively evaluated for impairment, Loans	89,971		102,080
Total	103,162		116,920
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	824		1,073
Collectively evaluated for impairment, ALLL	369		974
Total, ALLL	1,193	1,717	2,047	1,882	2,305	1,992
Individually evaluated for impairment, Loans	4,926		5,486
Collectively evaluated for impairment, Loans	303,000		293,083
Total	307,926		298,569
Total Consumer [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0		0
Collectively evaluated for impairment, ALLL	825		922
Total, ALLL	825	961	922	927	891	857
Individually evaluated for impairment, Loans	0		0
Collectively evaluated for impairment, Loans	73,665		70,140
Total	73,665		70,140
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment, ALLL	0		0
Collectively evaluated for impairment, ALLL	4,382		2,422
Total, ALLL	$ 4,382	$ 3,154	$ 2,422	$ 2,536	$ 2,179	$ 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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