Loans and Allowance for Credit Losses - Activity in the allowance for loan and lease losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 3,437	$ 3,273	$ 3,440	$ 3,222	$ 3,222
Provision (credit) for credit losses	145	(37)	151	26
Loans charged-off	(12)	(11)	(22)	(24)
Recoveries	6	2	7	3
Ending balance	3,576	3,227	3,576	3,227	3,440
Construction and Land loan
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Loans charged-off					(453)
1-4 residential & multi-family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Loans charged-off					(3)
Real estate \| Construction and Land loan
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	591	661	591	632	632
Provision (credit) for credit losses	(48)	(108)	(48)	(79)
Ending balance	543	553	543	553	591
Real estate \| Farmland loan
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	150	77	152	74	74
Provision (credit) for credit losses	105		103	3
Ending balance	255	77	255	77	152
Real estate \| 1-4 residential & multi-family
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,350	1,376	1,399	1,355	1,355
Provision (credit) for credit losses	65	60	16	84
Loans charged-off				(3)
Ending balance	1,415	1,436	1,415	1,436	1,399
Real estate \| Commercial real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	751	619	718	605	605
Provision (credit) for credit losses	19	19	52	33
Ending balance	770	638	770	638	718
Agriculture
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	1	1	1	1	1
Ending balance	1	1	1	1	1
Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	424	359	407	375	375
Provision (credit) for credit losses	7	(3)	24	(19)
Loans charged-off	(3)		(3)
Ending balance	428	356	428	356	407
Municipalities
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	99	93	102	83	83
Provision (credit) for credit losses	(2)	(1)	(5)	9
Ending balance	97	92	97	92	102
Consumer and other
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	71	87	70	97	97
Provision (credit) for credit losses	(1)	(4)	9	(5)
Loans charged-off	(9)	(11)	(19)	(21)
Recoveries	6	2	7	3
Ending balance	$ 67	$ 74	$ 67	$ 74	$ 70

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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+ References

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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