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Allowance for Credit Losses - Loans - Additional information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (Credit)	$ 218,000	$ 500,000	$ 553,000	$ (225,000)
Provision (credit) for credit losses	$ 189,000	500,000	1,411,000	(225,000)
Net loan charge-offs			$ 187,000	$ 1,500,000
Percentage of charge-offs			0.03%	0.21%
Net unfavorable shift			$ 778,000
Percentage Of Allowance For Total Loans	1.23%		1.23%		1.08%
Evaluated for impairment	$ 150,000		$ 150,000
Percentage of coverage on non-performing assets	199.00%		199.00%		207.00%
Percentage of general reserve	69.00%
Percentage of quantitative reserve	31.00%
Non-performing assets	$ 5,918,000		$ 5,918,000
Non-performing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing assets as a percent of loans	0.62%		0.62%
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-performing assets					$ 9,000
Consumer and Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum aggregate balances for commercial loan relationship under structure loan rating process.	$ 250,000		$ 250,000
Pass
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	2,000,000		2,000,000
Special Mention
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	250,000		250,000
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	250,000		250,000
Doubtful
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum individual loan balance requiring quarterly review	100,000		100,000
Commercial | Commercial.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (Credit)		(406,000)		$ (247,000)
Minimum aggregate balances for commercial loan relationship under structure loan rating process.	1,000,000		$ 1,000,000
Commercial | Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Minimum percent of portfolio to be reviewed			25.00%
Minimum aggregate balances for commercial loan relationship under structure loan rating process.	1,000,000		$ 1,000,000
Consumer. | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (Credit)	23,000	$ 1,000	440,000	$ 38,000
Non-performing assets	$ 697,000		$ 697,000

X

- Definition

The percentage of after recoveries, of loans and leases that have been written-off.

+ References

No definition available.

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Threshold amount for evaluation of impairment of financing receivable.

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- Definition

Amount of minimum aggregate balances for commercial loan relationship under structure loan rating process.

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- Definition

The amount of net unfavorable shift.

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Percentage of general reserve represented by qualitative adjustment.

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Percentage of general reserve represented by quantitative adjustment.

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- Definition

Percentage of allowance for credit loss to nonaccrual financing receivable.

+ References

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

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- Definition

Percentage of allowance for credit loss to total financing receivable outstanding.

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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.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
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-Section 50
-Paragraph 13
-Publisher FASB
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- Definition

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

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Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

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- Definition

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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