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Loans and ALLL (Summary of information pertaining to TDRs) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	4	11
Pre-Modification Recorded Investment	$ 2,969	$ 8,473
Post-Modification Recorded Investment	$ 2,969	$ 8,473
Commercial other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	5
Pre-Modification Recorded Investment	$ 2,871	$ 4,761
Post-Modification Recorded Investment	$ 2,871	$ 4,761
Agricultural other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	6
Pre-Modification Recorded Investment	$ 0	$ 3,712
Post-Modification Recorded Investment	$ 0	$ 3,712
Residential real estate senior liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0
Pre-Modification Recorded Investment	$ 98	$ 0
Post-Modification Recorded Investment	$ 98	$ 0
Below Market Interest Rate and Extension of Amortization Period [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	4
Pre-Modification Recorded Investment	$ 98	$ 1,572
Below Market Interest Rate and Extension of Amortization Period [Member] | Commercial other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	4
Pre-Modification Recorded Investment	$ 0	$ 1,572
Below Market Interest Rate and Extension of Amortization Period [Member] | Agricultural other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre-Modification Recorded Investment	$ 0	$ 0
Below Market Interest Rate and Extension of Amortization Period [Member] | Residential real estate senior liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	1	0
Pre-Modification Recorded Investment	$ 98	$ 0
Interest Rate Below Market Reduction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	7
Pre-Modification Recorded Investment	$ 2,871	$ 6,901
Interest Rate Below Market Reduction [Member] | Commercial other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	3	1
Pre-Modification Recorded Investment	$ 2,871	$ 3,189
Interest Rate Below Market Reduction [Member] | Agricultural other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	6
Pre-Modification Recorded Investment	$ 0	$ 3,712
Interest Rate Below Market Reduction [Member] | Residential real estate senior liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0
Pre-Modification Recorded Investment	$ 0	$ 0
Principal Forgiveness
Financing Receivable, Modifications [Line Items]
Number of Loans | loan	0	0

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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