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Allowance for Credit Losses - Loans - Amortized cost basis of collateral-dependent loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	$ 1,039,638	$ 1,038,271
Collateral Pledged [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	11,093	9,140
Other commercial real estate (non-owner occupied)
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	241,519	240,286
Other commercial real estate (non-owner occupied) | Collateral Pledged [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	10,411	8,780
Residential mortgages
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	179,297	174,670
Residential mortgages | Collateral Pledged [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	513	173
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	11
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	753,833	760,826
Commercial Portfolio Segment [Member] | Commercial real estate (owner occupied)
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	80,511	89,147
Commercial Portfolio Segment [Member] | Commercial real estate (owner occupied) | Collateral Pledged [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	158	187
Commercial Portfolio Segment [Member] | Other commercial real estate (non-owner occupied)
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	241,519	240,286
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	285,805	277,445
Consumer Portfolio Segment [Member] | Residential mortgages
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	179,297	174,670
Consumer Portfolio Segment [Member] | Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total loan	$ 106,508	$ 102,775

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

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