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Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 11,583,109 | $ 11,220,355
Noncovered Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 11,584,296 | 11,220,818
Unearned loan fees, net | (1,187) | (463)
Loans and Lease Receivable, Including Unearned Loan Fees | 11,583,109 | 11,220,355
Noncovered Loans | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 4,948,761 | 4,720,428
Noncovered Loans | Commercial - investor owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,824,200 | 2,607,755
Noncovered Loans | Commercial - owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,348,111 | 2,359,956
Noncovered Loans | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 859,827 | 892,563
Noncovered Loans | Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 364,516 | 358,923
Noncovered Loans | Total real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 6,396,654 | 6,219,197
Noncovered Loans | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 238,881 | $ 281,193

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