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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total | $ 11,079,892 | $ 10,884,118
Loans, including unearned loan fees | 10,940,114 | 10,749,347
Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 11,081,653 | 10,888,345
Loans, including unearned loan fees | 11,079,892 | 10,884,118
Unearned loan fees, net | (1,761) | (4,227)
Loans, before unearned loan fees, after allowance | 11,081,653 | 10,888,345
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,631,613 | 4,674,056
Loans, including unearned loan fees | 4,631,613 | 4,674,056
Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,526,696 | 2,452,402
Loans, including unearned loan fees | 2,526,696 | 2,452,402
Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,381,636 | 2,344,117
Loans, including unearned loan fees | 2,381,636 | 2,344,117
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 896,768 | 760,122
Loans, including unearned loan fees | 896,768 | 760,122
Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 354,888 | 371,995
Loans, including unearned loan fees | 354,888 | 371,995
Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 290,052 | 285,653
Loans, including unearned loan fees | 290,052 | 285,653
Total Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 59,737 | 60,676
Total Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 10,714 | 12,482
Total Past Due | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 14,557 | 20,300
Total Past Due | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 25,707 | 22,551
Total Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,907 | 2,678
Total Past Due | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 6,852 | 2,579
Total Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 86
30-89 Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 31,439 | 16,231
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 8,262 | 3,445
30-89 Days Past Due | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 273 | 1,905
30-89 Days Past Due | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 16,310 | 8,409
30-89 Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 770
30-89 Days Past Due | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 6,594 | 1,620
30-89 Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 82
90 or More Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 28,298 | 44,445
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,452 | 9,037
90 or More Days Past Due | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 14,284 | 18,395
90 or More Days Past Due | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 9,397 | 14,142
90 or More Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,907 | 1,908
90 or More Days Past Due | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 258 | 959
90 or More Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 4
Current | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 11,021,916 | 10,827,669
Current | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,620,899 | 4,661,574
Current | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,512,139 | 2,432,102
Current | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,355,929 | 2,321,566
Current | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 894,861 | 757,444
Current | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 348,036 | 369,416
Current | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | $ 290,052 | $ 285,567

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