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Loans - Schedule of Non-Purchased Loans and Leases (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022
--- | --- | --- | ---
Summary of loans |  |  |
Gross loans | $ 12,175,234 | $ 11,585,458 |
Unearned income | (7,211) | (7,154) |
Loans, net of unearned income | 12,168,023 | 11,578,304 | $ 11,105,004
Commercial, financial, agricultural |  |  |
Summary of loans |  |  |
Gross loans | 1,819,891 | 1,673,883 |
Loans, net of unearned income | 1,819,891 |  | 1,513,091
Lease financing |  |  |
Summary of loans |  |  |
Gross loans | 127,935 | 122,167 |
Loans, net of unearned income | 120,724 |  | 103,357
Real estate – construction: |  |  |
Summary of loans |  |  |
Gross loans | 1,407,364 | 1,330,337 |
Loans, net of unearned income | 1,407,364 |  | 1,215,056
Real estate – construction: | Residential |  |  |
Summary of loans |  |  |
Gross loans | 300,238 | 355,500 |
Real estate – construction: | Commercial |  |  |
Summary of loans |  |  |
Gross loans | 1,107,126 | 974,837 |
Real estate – 1-4 family mortgage: |  |  |
Summary of loans |  |  |
Gross loans | 3,398,876 | 3,216,263 |
Loans, net of unearned income | 3,398,876 |  | 3,127,889
Real estate – 1-4 family mortgage: | Primary |  |  |
Summary of loans |  |  |
Gross loans | 2,405,703 | 2,222,856 |
Real estate – 1-4 family mortgage: | Home equity |  |  |
Summary of loans |  |  |
Gross loans | 509,394 | 501,906 |
Real estate – 1-4 family mortgage: | Rental/investment |  |  |
Summary of loans |  |  |
Gross loans | 353,613 | 334,382 |
Real estate – 1-4 family mortgage: | Land development |  |  |
Summary of loans |  |  |
Gross loans | 130,166 | 157,119 |
Real estate – 1-4 family mortgage: | Land development |  |  |
Summary of loans |  |  |
Gross loans | 130,166 | 157,119 |
Real estate – commercial mortgage: |  |  |
Summary of loans |  |  |
Gross loans | 5,313,166 | 5,118,063 |
Loans, net of unearned income | 5,313,166 |  | 5,016,665
Real estate – commercial mortgage: | Owner-occupied |  |  |
Summary of loans |  |  |
Gross loans | 1,588,174 | 1,539,296 |
Real estate – commercial mortgage: | Non-owner occupied |  |  |
Summary of loans |  |  |
Gross loans | 3,610,578 | 3,452,910 |
Real estate – commercial mortgage: | Land development |  |  |
Summary of loans |  |  |
Gross loans | 114,414 | 125,857 |
Installment loans to individuals |  |  |
Summary of loans |  |  |
Gross loans | 108,002 | $ 124,745 |
Loans, net of unearned income | $ 108,002 |  | $ 128,946

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