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Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Summary of loans, by loan type |  |
Total loans | $ 7,896,899 | $ 7,430,603
Commercial, financial and agricultural |  |
Summary of loans, by loan type |  |
Total loans | 4,637,170 | 4,373,373
Real estate - mortgage |  |
Summary of loans, by loan type |  |
Total loans | 907,615 | 865,994
Obligations of states and political subdivisions |  |
Summary of loans, by loan type |  |
Total loans | 2,126,302 | 1,989,669
Consumer |  |
Summary of loans, by loan type |  |
Total loans | 44,767 | 41,592
Foreign. |  |
Summary of loans, by loan type |  |
Total loans | $ 181,045 | $ 159,975

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