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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, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | $ 11,583,109 | $ 11,220,355
Loans, including unearned loan fees | 11,434,255 | 11,082,405
Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 11,584,296 | 11,220,818
Loans, including unearned loan fees | 11,583,109 | 11,220,355
Unearned loan fees, net | (1,187) | (463)
Loans, before unearned loan fees, after allowance | 11,584,296 | 11,220,818
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 4,948,761 | 4,720,428
Loans, including unearned loan fees | 4,948,761 | 4,720,428
Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 2,824,200 | 2,607,755
Loans, including unearned loan fees | 2,824,200 | 2,607,755
Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 2,348,111 | 2,359,956
Loans, including unearned loan fees | 2,348,111 | 2,359,956
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 859,827 | 892,563
Loans, including unearned loan fees | 859,827 | 892,563
Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 364,516 | 358,923
Loans, including unearned loan fees | 364,516 | 358,923
Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 238,881 | 281,193
Loans, including unearned loan fees | 238,881 | 281,193
Total Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 159,526 | 67,874
Total Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 30,333 | 14,176
Total Past Due | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 82,283 | 15,710
Total Past Due | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 33,665 | 29,133
Total Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 2,459 | 5,721
Total Past Due | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 10,736 | 3,091
Total Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 50 | 43
30-89 Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 20,106 | 16,835
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 6,358 | 1,948
30-89 Days Past Due | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 5,080 | 1,377
30-89 Days Past Due | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 5,561 | 10,542
30-89 Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 1,005 | 101
30-89 Days Past Due | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 2,085 | 2,833
30-89 Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 17 | 34
90 or More Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 139,420 | 51,039
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 23,975 | 12,228
90 or More Days Past Due | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 77,203 | 14,333
90 or More Days Past Due | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 28,104 | 18,591
90 or More Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 1,454 | 5,620
90 or More Days Past Due | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 8,651 | 258
90 or More Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 33 | 9
Current | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 11,424,770 | 11,152,944
Current | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 4,918,428 | 4,706,252
Current | Non-Covered Loans | Commercial - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 2,741,917 | 2,592,045
Current | Non-Covered Loans | Commercial - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 2,314,446 | 2,330,823
Current | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 857,368 | 886,842
Current | Non-Covered Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | 353,780 | 355,832
Current | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, including unearned loan fees | $ 238,831 | $ 281,150

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