Loans and Allowance for Credit Losses on Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	$ 4,940	$ 3,916
Nonaccrual Loans with ACL	791	714
ACL on Nonaccrual Loans	303	264
Collateral Dependent Nonaccrual Loans	4,889	3,891
ACL on Collateral Dependent Nonaccrual Loans	277	264
Loans guaranteed by US government agency
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	0	0
Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	4,387	3,823
Nonaccrual Loans with ACL	740	689
ACL on Nonaccrual Loans	277	264
Collateral Dependent Nonaccrual Loans	4,387	3,823
ACL on Collateral Dependent Nonaccrual Loans	277	264
Commercial real estate \| Commercial property
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	932	958
Nonaccrual Loans with ACL	0	0
ACL on Nonaccrual Loans	0	0
Collateral Dependent Nonaccrual Loans	932	958
ACL on Collateral Dependent Nonaccrual Loans	0	0
Commercial real estate \| Business property
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	3,455	2,865
Nonaccrual Loans with ACL	740	689
ACL on Nonaccrual Loans	277	264
Collateral Dependent Nonaccrual Loans	3,455	2,865
ACL on Collateral Dependent Nonaccrual Loans	277	264
Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	111	68
Nonaccrual Loans with ACL	45	0
ACL on Nonaccrual Loans	26	0
Collateral Dependent Nonaccrual Loans	66	68
ACL on Collateral Dependent Nonaccrual Loans	0	0
Consumer
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	442	25
Nonaccrual Loans with ACL	6	25
ACL on Nonaccrual Loans	0	0
Collateral Dependent Nonaccrual Loans	436	0
ACL on Collateral Dependent Nonaccrual Loans	0	0
Consumer \| Residential mortgage
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	436
Nonaccrual Loans with ACL	0
ACL on Nonaccrual Loans	0
Collateral Dependent Nonaccrual Loans	436
ACL on Collateral Dependent Nonaccrual Loans	0
Consumer \| Other consumer
Financing Receivable, Nonaccrual [Line Items]
Total Nonaccrual Loans	6	25
Nonaccrual Loans with ACL	6	25
ACL on Nonaccrual Loans	0	0
Collateral Dependent Nonaccrual Loans	0	0
ACL on Collateral Dependent Nonaccrual Loans	$ 0	$ 0

Financing Receivable, Excluding Accrued Interest, Nonaccrual, Allowance for Credit Loss

No definition available.

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- Definition

Financing Receivable, Excluding Accrued Interest, Nonaccrual, Allowance for Credit Loss, Collateral Dependent

+ References

No definition available.

+ Details

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- Definition

Financing Receivable, Excluding Accrued Interest, Nonaccrual With Allowance For Credit Losses

+ References

No definition available.

+ Details

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- Definition

Financing Receivable, Excluding Accrued Interest, Nonaccrual With Allowance For Credit Losses, Collateral Dependent

+ References

No definition available.

+ Details

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. 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 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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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
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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