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Loans - Recorded Investment in Nonperforming Loans by Category (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | $ 11,079,892 | $ 10,884,118
Non-Covered Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual | 28,149 | 43,181
Loans over 90 days past due and still accruing interest | 227 | 547
Total nonperforming loans | 28,376 | 43,728
Loans, including unearned loan fees | 11,081,653 | 10,888,345
Nonaccrual loans with no allowance | 5,400 | 36,078
Non-Covered Loans | Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 18,295 | 26,426
Non-Covered Loans | Residential Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 482 | 5,202
Non-Covered Loans | Blanket Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 736 | 2,175
Non-Covered Loans | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 3,733 | 3,445
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual | 6,648 | 7,641
Loans over 90 days past due and still accruing interest | 227 | 115
Total nonperforming loans | 6,875 | 7,756
Loans, including unearned loan fees | 4,631,613 | 4,674,056
Nonaccrual loans with no allowance | 296 | 6,179
Non-Covered Loans | Commercial and industrial | Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 296 | 527
Non-Covered Loans | Commercial and industrial | Residential Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 0 | 1,864
Non-Covered Loans | Commercial and industrial | Blanket Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 0 | 344
Non-Covered Loans | Commercial and industrial | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 3,733 | 3,445
Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual | 14,284 | 20,404
Loans over 90 days past due and still accruing interest | 0 | 0
Total nonperforming loans | 14,284 | 20,404
Loans, including unearned loan fees | 2,526,696 | 2,452,402
Nonaccrual loans with no allowance | 0 | 19,466
Non-Covered Loans | Commercial - investor owned | Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 14,284 | 19,467
Non-Covered Loans | Commercial - investor owned | Residential Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 0 | 0
Non-Covered Loans | Commercial - investor owned | Blanket Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 0 | 0
Non-Covered Loans | Commercial - investor owned | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 0 | 0
Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual | 6,432 | 12,972
Loans over 90 days past due and still accruing interest | 0 | 363
Total nonperforming loans | 6,432 | 13,335
Loans, including unearned loan fees | 2,381,636 | 2,344,117
Nonaccrual loans with no allowance | 4,577 | 9,010
Non-Covered Loans | Commercial - owner occupied | Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 3,715 | 5,904
Non-Covered Loans | Commercial - owner occupied | Residential Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 482 | 1,638
Non-Covered Loans | Commercial - owner occupied | Blanket Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 736 | 1,831
Non-Covered Loans | Commercial - owner occupied | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees | 0 | 0
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual | 527 | 1,205
Loans over 90 days past due and still accruing interest | 0 | 64
Total nonperforming loans | 527 | 1,269
Loans, including unearned loan fees | 896,768 | 760,122
Nonaccrual loans with no allowance | 527 | 464
Non-Covered Loans | Construction and land development | Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 528
Non-Covered Loans | Construction and land development | Residential Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 741
Non-Covered Loans | Construction and land development | Blanket Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 0
Non-Covered Loans | Construction and land development | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 0
Non-Covered Loans | Residential |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual | 258 | 959
Loans over 90 days past due and still accruing interest | 0 | 0
Total nonperforming loans | 258 | 959
Loans, including unearned loan fees | 354,888 | 371,995
Nonaccrual loans with no allowance | 0 | 959
Non-Covered Loans | Residential | Commercial Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 0
Non-Covered Loans | Residential | Residential Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 959
Non-Covered Loans | Residential | Blanket Lien |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 0
Non-Covered Loans | Residential | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Loans, including unearned loan fees |  | 0
Non-Covered Loans | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Nonaccrual |  | 0
Loans over 90 days past due and still accruing interest |  | 5
Total nonperforming loans |  | 5
Loans, including unearned loan fees | $ 290,052 | 285,653
Nonaccrual loans with no allowance |  | $ 0

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