Loans - Internal Credit Assessment (Details) - USD ($)	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccural, interest income	$ 100,000	$ 200,000
Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual Loans	5,885,000		$ 7,450,000
Total Loans 90 Days or More Past Due and Accruing	0		79,000
Nonaccrual Loans with no Allowance for Credit Losses	3,164,000		5,401,000
Commercial Portfolio Segment \| Commercial and industrial \| Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual Loans	0		51,000
Total Loans 90 Days or More Past Due and Accruing	0		0
Nonaccrual Loans with no Allowance for Credit Losses	0		0
Commercial Portfolio Segment \| Owner-occupied commercial real estate \| Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual Loans	0		1,570,000
Total Loans 90 Days or More Past Due and Accruing	0		0
Nonaccrual Loans with no Allowance for Credit Losses	0		1,570,000
Commercial Portfolio Segment \| Small business lending \| Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual Loans	4,442,000		4,764,000
Total Loans 90 Days or More Past Due and Accruing	0		0
Nonaccrual Loans with no Allowance for Credit Losses	1,721,000		2,766,000
Consumer Portfolio \| Residential mortgage \| Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual Loans	1,354,000		1,048,000
Total Loans 90 Days or More Past Due and Accruing	0		79,000
Nonaccrual Loans with no Allowance for Credit Losses	1,354,000		1,048,000
Consumer Portfolio \| Other consumer loans \| Nonaccrual
Financing Receivable, Credit Quality Indicator [Line Items]
Nonaccrual Loans	89,000		17,000
Total Loans 90 Days or More Past Due and Accruing	0		0
Nonaccrual Loans with no Allowance for Credit Losses	$ 89,000		$ 17,000

Amortized cost excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

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-Topic 326
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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