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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, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 5,655,759	$ 5,633,562
Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	3,894,661	3,886,972
Commercial | Real Estate Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	2,465,488	$ 2,416,294
Commercial | Real Estate Loan | Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	793,289
Commercial | Real Estate Loan | Shopping Centers and Malls | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	248,182
Commercial | Real Estate Loan | Industrial and Warehouse | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	225,889
Commercial | Real Estate Loan | Hotels and Motels | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	212,145
Commercial | Real Estate Loan | Skilled Nursing Facility | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	163,030
Commercial | Real Estate Loan | Office | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	149,736
Commercial | Real Estate Loan | Retail | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	116,988
Commercial | Real Estate Loan | Assisted Living Facility | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	115,860
Commercial | Real Estate Loan | Medical Office | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	96,539
Commercial | Real Estate Loan | Other Property Types | Non Owner Occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 343,830

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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 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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