Loans and Allowance for Credit Losses on Loans - Modified loans (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023 USD ($) item loan	Jun. 30, 2023 USD ($) item
Loan portfolio past due loans
Number of loans modified for borrowers \| loan	0
Number of modified loans defaulted during the period \| item	0	0
Total Past Due
Loan portfolio past due loans
Modified loans	$ 3,778	$ 3,778
Greater Than 90 Days
Loan portfolio past due loans
Modified loans	3,778	3,778
Payment Delay
Loan portfolio past due loans
Modified loans	3,778	$ 3,778
Commercial and commercial real estate
Loan portfolio past due loans
Weighted average term increase from modification		3 months
Commercial and commercial real estate \| Total Past Due
Loan portfolio past due loans
Modified loans	3,778	$ 3,778
Commercial and commercial real estate \| Greater Than 90 Days
Loan portfolio past due loans
Modified loans	3,778	3,778
Commercial and commercial real estate \| Payment Delay
Loan portfolio past due loans
Modified loans	$ 3,778	$ 3,778

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- Definition

Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-34

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- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
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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/2009/role/commonPracticeRef
-Topic 326
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-Name Accounting Standards Codification
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