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Loans and Allowance for Credit Losses - Summary of Gross Commercial Real Estate Loans By Property Type (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 5,852,630	$ 5,710,312
Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,988,060	3,906,596
Commercial | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,451,529	2,442,627
Commercial | Real Estate Loan | Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	752,039	782,231
Commercial | Real Estate Loan | Shopping Centers and Malls | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	227,733	244,000
Commercial | Real Estate Loan | Industrial and Warehouse | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	230,346	218,175
Commercial | Real Estate Loan | Hotels and Motels | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	217,804	206,425
Commercial | Real Estate Loan | Skilled Nursing Facility | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	171,800	172,834
Commercial | Real Estate Loan | Office | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	162,594	145,006
Commercial | Real Estate Loan | Assisted Living Facility | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	139,043	119,416
Commercial | Real Estate Loan | Retail | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	111,357	110,850
Commercial | Real Estate Loan | RV Parks and Campgrounds | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	107,396	84,346
Commercial | Real Estate Loan | Medical Office | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	75,390	88,532
Commercial | Real Estate Loan | Other Property Types | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 256,027	$ 270,812

X

- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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- Definition

Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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