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Loans - Summary of Portfolio Loans by Category (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 9,056,073 | $ 9,017,642
Portfolio loans, net |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 9,064,414 | 9,026,780
Unearned loan fees, net | (8,341) | (9,138)
Financing Receivable, Covered, after Allowance for Credit Loss, Total | 9,056,073 | 9,017,642
Portfolio loans, net | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 3,400,574 | 3,396,590
Financing Receivable, Covered, after Allowance for Credit Loss, Total | 3,398,723 | 3,392,375
Portfolio loans, net | Commercial - investor owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,184,126 | 2,141,143
Financing Receivable, Covered, after Allowance for Credit Loss, Total | 2,184,126 | 2,141,143
Portfolio loans, net | Commercial - owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,094,012 | 2,035,785
Financing Receivable, Covered, after Allowance for Credit Loss, Total | 2,094,012 | 2,035,785
Portfolio loans, net | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 702,630 | 734,073
Financing Receivable, Covered, after Allowance for Credit Loss, Total | 702,630 | 734,073
Portfolio loans, net | Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 432,639 | 454,052
Financing Receivable, Covered, after Allowance for Credit Loss, Total | 432,639 | 454,052
Portfolio loans, net | Total real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 5,413,407 | 5,365,053
Portfolio loans, net | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 250,433 | 265,137
Financing Receivable, Covered, after Allowance for Credit Loss, Total | $ 243,943 | $ 260,214

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