Loans and Allowance for Credit Losses - Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	$ 6,492	$ 7,076
Nonaccrual With No ACL	6,100	7,014
Government guarantees
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,455	646
Nonaccrual With No ACL	1,455	646
Net of government guarantees
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	5,037	6,430
Nonaccrual With No ACL	4,645	6,368
Commercial & industrial loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	4,254	3,294
Nonaccrual With No ACL	4,056	3,287
Commercial real estate \| Owner occupied properties
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	306	1,457
Nonaccrual With No ACL	271	1,457
Commercial real estate \| Non-owner occupied and multifamily properties
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	0	274
Nonaccrual With No ACL	0	274
Residential real estate \| 1-4 family residential properties secured by first liens
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	53	151
Nonaccrual With No ACL	0	144
Residential real estate \| 1-4 family residential properties secured by junior liens and revolving secured by 1-4 family first liens
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	225	246
Nonaccrual With No ACL	119	198
Residential real estate \| 1-4 family residential construction loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	109	109
Nonaccrual With No ACL	109	109
Other construction, land development and raw land loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual	1,545	1,545
Nonaccrual With No ACL	$ 1,545	$ 1,545

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. 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 16
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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