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Loans and Allowance for Credit Losses - CECL (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Jan. 01, 2023	Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022		Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for (release of) credit losses on loans and unfunded commitments		$ 300		$ 300	$ 1,115		$ (1,000)
Liability for unfunded commitments		22,462	[1]	$ 15,505	22,462	[1]	$ 15,505	$ 22,236	$ 15,588	[1]	$ 15,353	$ 16,903
Unfunded Loan Commitment
Financing Receivable, Allowance for Credit Loss [Line Items]
Liability for unfunded commitments		$ 900			$ 900
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for (release of) credit losses on loans and unfunded commitments	$ 5,800
Liability for unfunded commitments	5,793								$ 5,793
Cumulative Effect, Period of Adoption, Adjustment | Unfunded Loan Commitment
Financing Receivable, Allowance for Credit Loss [Line Items]
Liability for unfunded commitments	$ 1,300
[1] amounts include the impacts of the January 1, 2023 adoption of ASU 2016-13. See Note 2 for details.See accompanying notes to the consolidated financial statements (unaudited)

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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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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
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. 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 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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