Loans (Average Balance and Interest Income of Loans Individually Evaluated for Impairment) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
With No Related Allowance Recorded:
Average Recorded Investment	$ 5,912	$ 4,097
Interest Income Recognized	101	133
Cash Basis Recognized	2	39
With An Allowance Recorded:
Average Recorded Investment	6,894	7,636
Interest Income Recognized	0	20
Cash Basis Recognized	2	9
Average Recorded Investment	12,806	11,733
Interest Income Recognized	101	153
Cash Basis Recognized	4	48
Acquired with Deteriorated Credit Quality
With No Related Allowance Recorded:
Average Recorded Investment	4,321	875
Interest Income Recognized	61	21
Cash Basis Recognized	3	0
With An Allowance Recorded:
Average Recorded Investment	1,766	151
Interest Income Recognized	0	29
Cash Basis Recognized	0	0
Commercial and Industrial Loans and Leases
With No Related Allowance Recorded:
Average Recorded Investment	1,175	1,164
Interest Income Recognized	19	53
Cash Basis Recognized	1	3
With An Allowance Recorded:
Average Recorded Investment	3,753	2,956
Interest Income Recognized	0	2
Cash Basis Recognized	1	9
Commercial Real Estate Loans
With No Related Allowance Recorded:
Average Recorded Investment	2,947	2,163
Interest Income Recognized	81	80
Cash Basis Recognized	1	36
With An Allowance Recorded:
Average Recorded Investment	3,141	4,680
Interest Income Recognized	0	18
Cash Basis Recognized	1	0
Agricultural Loans
With No Related Allowance Recorded:
Average Recorded Investment	1,790	770
Interest Income Recognized	1	0
Cash Basis Recognized	0	0
With An Allowance Recorded:
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Cash Basis Recognized	$ 0	$ 0

Financing Receivable, Impaired, Allowance Recorded [Abstract]

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Financing Receivable, Impaired, No Related Allowance Recorded [Abstract].

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No definition available.

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524

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Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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