Loans, Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Recorded Investment
With no related allowance recorded	$ 11,977		$ 12,727
With an allowance recorded	1,386		3,134
Total	13,363		15,861
Unpaid Principal Balance
With no related allowance recorded	13,376		14,679
With an allowance recorded	1,387		3,286
Total	14,763		17,965
Related Allowance
With an allowance recorded	34		295
Average Recorded Investment
With no related allowance recorded	14,033	$ 23,338
With an allowance recorded	1,278	1,147
Total	15,311	24,485
Interest Income Recognized
With no related allowance recorded	707	262
With an allowance recorded	17	24
Total	724	286
Cash basis interest expense on impaired loans	10,000	0
Commercial and industrial [Member]
Recorded Investment
With no related allowance recorded	562		711
With an allowance recorded	956		230
Total	1,518		941
Unpaid Principal Balance
With no related allowance recorded	862		1,253
With an allowance recorded	956		235
Total	1,818		1,488
Related Allowance
With an allowance recorded	22		6
Average Recorded Investment
With no related allowance recorded	637	767
With an allowance recorded	839	259
Total	1,476	1,026
Interest Income Recognized
With no related allowance recorded	264	7
With an allowance recorded	10	4
Total	274	11
Commercial, secured by real estate [Member]
Recorded Investment
With no related allowance recorded	7,951		8,625
With an allowance recorded	94		2,338
Total	8,045		10,963
Unpaid Principal Balance
With no related allowance recorded	8,459		9,373
With an allowance recorded	95		2,485
Total	8,554		11,858
Related Allowance
With an allowance recorded	0		272
Average Recorded Investment
With no related allowance recorded	9,823	18,302
With an allowance recorded	95	244
Total	9,918	18,546
Interest Income Recognized
With no related allowance recorded	344	199
With an allowance recorded	2	12
Total	346	211
Residential real estate [Member]
Recorded Investment
With no related allowance recorded	3,185		3,118
With an allowance recorded	332		549
Total	3,517		3,667
Unpaid Principal Balance
With no related allowance recorded	3,655		3,651
With an allowance recorded	332		549
Total	3,987		4,200
Related Allowance
With an allowance recorded	12		17
Average Recorded Investment
With no related allowance recorded	3,289	3,916
With an allowance recorded	339	622
Total	3,628	4,538
Interest Income Recognized
With no related allowance recorded	92	47
With an allowance recorded	5	8
Total	97	55
Consumer [Member]
Recorded Investment
With no related allowance recorded	9		10
With an allowance recorded	4		17
Total	13		27
Unpaid Principal Balance
With no related allowance recorded	9		10
With an allowance recorded	4		17
Total	13		27
Related Allowance
With an allowance recorded	0		0
Average Recorded Investment
With no related allowance recorded	18	13
With an allowance recorded	5	22
Total	23	35
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	0	0
Total	0	0
Agricultural [Member]
Recorded Investment
With no related allowance recorded	0		0
With an allowance recorded	0		0
Total	0		0
Unpaid Principal Balance
With no related allowance recorded	0		0
With an allowance recorded	0		0
Total	0		0
Related Allowance
With an allowance recorded	0		0
Average Recorded Investment
With no related allowance recorded	0	0
With an allowance recorded	0	0
Total	0	0
Interest Income Recognized
With no related allowance recorded	0	0
With an allowance recorded	0	0
Total	0	0
Other [Member]
Recorded Investment
With no related allowance recorded	270		263
With an allowance recorded	0		0
Total	270		263
Unpaid Principal Balance
With no related allowance recorded	391		392
With an allowance recorded	0		0
Total	391		392
Related Allowance
With an allowance recorded	0		$ 0
Average Recorded Investment
With no related allowance recorded	266	340
With an allowance recorded	0	0
Total	266	340
Interest Income Recognized
With no related allowance recorded	7	9
With an allowance recorded	0	0
Total	$ 7	$ 9