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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 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total | $ 11,028,492 | $ 10,884,118
Loans, including unearned loan fees | 112,317 | 77,569
Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 11,032,537 | 10,888,345
Loans, including unearned loan fees | 11,028,492 | 10,884,118
Unearned loan fees, net | (4,045) | (4,227)
Loans, before unearned loan fees, after allowance | 11,032,537 | 10,888,345
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,768,777 | 4,674,056
Loans, including unearned loan fees | 4,768,777 | 4,674,056
Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,448,674 | 2,452,402
Loans, including unearned loan fees | 2,448,674 | 2,452,402
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,349,292 | 2,344,117
Loans, including unearned loan fees | 2,349,292 | 2,344,117
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 820,249 | 760,122
Loans, including unearned loan fees | 820,249 | 760,122
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 366,934 | 371,995
Loans, including unearned loan fees | 366,934 | 371,995
Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 278,611 | 285,653
Loans, including unearned loan fees | 278,611 | 285,653
Total Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 78,478 | 60,676
Total Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 25,127 | 12,482
Total Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 20,052 | 20,300
Total Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 29,492 | 22,551
Total Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,648 | 2,678
Total Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,112 | 2,579
Total Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 47 | 86
30-89 Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 39,603 | 16,231
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 20,996 | 3,445
30-89 Days Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,657 | 1,905
30-89 Days Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 14,844 | 8,409
30-89 Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 973 | 770
30-89 Days Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,112 | 1,620
30-89 Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 21 | 82
90 or More Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 38,875 | 44,445
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,131 | 9,037
90 or More Days Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 18,395 | 18,395
90 or More Days Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 14,648 | 14,142
90 or More Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,675 | 1,908
90 or More Days Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 959
90 or More Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 26 | 4
Current | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans, before unearned loan fees | 10,954,059 | 10,827,669
Current | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,743,650 | 4,661,574
Current | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,428,622 | 2,432,102
Current | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,319,800 | 2,321,566
Current | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 817,601 | 757,444
Current | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 365,822 | 369,416
Current | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | $ 278,564 | $ 285,567

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