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Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 11,028,492 | $ 10,884,118
Noncovered Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 11,032,537 | 10,888,345
Unearned loan fees, net | (4,045) | (4,227)
Loans and Lease Receivable, Including Unearned Loan Fees | 11,028,492 | 10,884,118
Noncovered Loans | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 4,768,777 | 4,674,056
Noncovered Loans | Commercial - investor owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,448,674 | 2,452,402
Noncovered Loans | Commercial - owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,349,292 | 2,344,117
Noncovered Loans | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 820,249 | 760,122
Noncovered Loans | Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 366,934 | 371,995
Noncovered Loans | Total real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 5,985,149 | 5,928,636
Noncovered Loans | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 278,611 | $ 285,653

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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B Reference 3: 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 + Details
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- Definition Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481598/310-20-45-1 + Details
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