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Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 9,354,987 | $ 9,017,642
Portfolio loans, net |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 9,361,916 | 9,026,780
Unearned loan fees, net | (6,929) | (9,138)
Loans, including unearned loan fees | 9,354,987 | 9,017,642
Portfolio loans, net | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 3,710,012 | 3,396,590
Loans, including unearned loan fees | 3,709,893 | 3,392,375
Portfolio loans, net | Commercial - investor owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,286,458 | 2,141,143
Loans, including unearned loan fees | 2,286,458 | 2,141,143
Portfolio loans, net | Commercial - owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,152,189 | 2,035,785
Loans, including unearned loan fees | 2,152,189 | 2,035,785
Portfolio loans, net | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 583,649 | 734,073
Loans, including unearned loan fees | 583,649 | 734,073
Portfolio loans, net | Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 397,450 | 454,052
Loans, including unearned loan fees | 397,450 | 454,052
Portfolio loans, net | Total real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 5,419,746 | 5,365,053
Portfolio loans, net | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 232,158 | 265,137
Loans, including unearned loan fees | $ 225,348 | $ 260,214

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