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Loans and Allowance for Credit Losses - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) category	Jun. 30, 2023 loan	Jun. 30, 2023 property	Jun. 30, 2023 component	Dec. 31, 2022 USD ($)
Financing Receivable, Impaired [Line Items]
Foreclosed properties held	$ 0.9
Number of points in internal risk rating system | category	9
Number of categories in internal risk rating system considered as not criticized | category	6
Commercial relationship credit review threshold amount	$ 1.0
Commercial relationship credit review threshold amount, independent external review	$ 3.0
Past due period before loans placed in non-accrual status	90 days
Recent loan payment history before removal from non-accrual status	6 months
Allowance for loan losses, number of evaluation components | component				2
Impaired loans, related reserves	$ 0.0				$ 0.1
Liability for unfunded commitments	1.4				$ 0.5
Residential real estate
Financing Receivable, Impaired [Line Items]
Foreclosed properties held	$ 0.8
Increase (decrease) in impaired loans (as a percentage)	89.00%
Number foreclosed properties held		2,000,000	2
Investment in loans in the process of foreclosure	$ 0.2
Residential real estate | Other Loan Relationships
Financing Receivable, Impaired [Line Items]
Foreclosed properties held	$ 0.1
Increase (decrease) in impaired loans (as a percentage)	11.00%
Total commercial
Financing Receivable, Impaired [Line Items]
Number foreclosed properties held | loan		2

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The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

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