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Loans - Schedule of Non-Purchased Loans and Leases (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Summary of loans |  |  |
Gross loans | $ 12,506,121 | $ 12,358,017 |
Unearned income | (5,596) | (6,787) |
Loans, net of unearned income | 12,500,525 | 12,351,230 | $ 11,766,425
Commercial, financial, agricultural |  |  |
Summary of loans |  |  |
Gross loans | 1,869,408 | 1,871,821 |
Loans, net of unearned income | 1,869,408 |  | 1,740,778
Lease financing |  |  |
Summary of loans |  |  |
Gross loans | 113,070 | 122,807 |
Loans, net of unearned income | 107,474 |  | 121,146
Real estate – construction: |  |  |
Summary of loans |  |  |
Gross loans | 1,243,535 | 1,333,397 |
Loans, net of unearned income | 1,243,535 |  | 1,424,352
Real estate – construction: | Residential |  |  |
Summary of loans |  |  |
Gross loans | 271,966 | 269,616 |
Real estate – construction: | Commercial |  |  |
Summary of loans |  |  |
Gross loans | 971,569 | 1,063,781 |
Real estate – 1-4 family mortgage: |  |  |
Summary of loans |  |  |
Gross loans | 3,429,286 | 3,439,919 |
Loans, net of unearned income | 3,429,286 |  | 3,278,980
Real estate – 1-4 family mortgage: | Primary |  |  |
Summary of loans |  |  |
Gross loans | 2,404,521 | 2,422,482 |
Real estate – 1-4 family mortgage: | Home equity |  |  |
Summary of loans |  |  |
Gross loans | 525,346 | 522,688 |
Real estate – 1-4 family mortgage: | Rental/investment |  |  |
Summary of loans |  |  |
Gross loans | 387,556 | 373,755 |
Real estate – 1-4 family mortgage: | Land development |  |  |
Summary of loans |  |  |
Gross loans | 111,863 | 120,994 |
Real estate – 1-4 family mortgage: | Land development |  |  |
Summary of loans |  |  |
Gross loans | 111,863 | 120,994 |
Real estate – commercial mortgage: |  |  |
Summary of loans |  |  |
Gross loans | 5,753,230 | 5,486,550 |
Loans, net of unearned income | 5,753,230 |  | 5,085,813
Real estate – commercial mortgage: | Owner-occupied |  |  |
Summary of loans |  |  |
Gross loans | 1,678,911 | 1,648,961 |
Real estate – commercial mortgage: | Non-owner occupied |  |  |
Summary of loans |  |  |
Gross loans | 3,970,881 | 3,733,174 |
Real estate – commercial mortgage: | Land development |  |  |
Summary of loans |  |  |
Gross loans | 103,438 | 104,415 |
Installment loans to individuals |  |  |
Summary of loans |  |  |
Gross loans | 97,592 | $ 103,523 |
Loans, net of unearned income | $ 97,592 |  | $ 115,356

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