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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Analysis of Past-Due Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 19,997,871 | $ 19,855,253
Loans 90 Days or More Past Due and Still Accruing | 15,792 | 17,865
Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 247,959 | 273,465
Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 69,953 | 95,203
Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 29,366 | 34,637
Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 148,640 | 143,625
Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 19,749,912 | 19,581,788
Commercial, financial and agricultural |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,722,180 | 2,679,403
Loans 90 Days or More Past Due and Still Accruing | 3,969 | 3,267
Commercial, financial and agricultural | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 30,990 | 33,302
Commercial, financial and agricultural | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 12,302 | 16,219
Commercial, financial and agricultural | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,307 | 5,451
Commercial, financial and agricultural | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 13,381 | 11,632
Commercial, financial and agricultural | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,691,190 | 2,646,101
Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 349,775 | 384,037
Loans 90 Days or More Past Due and Still Accruing | 409 | 472
Consumer | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 8,781 | 6,443
Consumer | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,314 | 2,539
Consumer | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,835 | 3,163
Consumer | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 632 | 741
Consumer | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 340,994 | 377,594
Indirect automobile |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 83,466 | 108,648
Loans 90 Days or More Past Due and Still Accruing |  | 0
Indirect automobile | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 469 | 810
Indirect automobile | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 190 | 466
Indirect automobile | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 122 | 77
Indirect automobile | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 157 | 267
Indirect automobile | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 82,997 | 107,838
Mortgage warehouse |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 958,418 | 1,038,924
Loans 90 Days or More Past Due and Still Accruing | 0 | 0
Mortgage warehouse | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Mortgage warehouse | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Mortgage warehouse | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Mortgage warehouse | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Mortgage warehouse | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 958,418 | 1,038,924
Municipal |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 505,515 | 509,151
Loans 90 Days or More Past Due and Still Accruing | 0 | 0
Municipal | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Municipal | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Municipal | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Municipal | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 0
Municipal | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 505,515 | 509,151
Premium finance |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 947,257 | 1,023,479
Loans 90 Days or More Past Due and Still Accruing | 11,414 | 13,626
Premium finance | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 27,438 | 38,105
Premium finance | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 9,922 | 13,859
Premium finance | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 6,102 | 10,620
Premium finance | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 11,414 | 13,626
Premium finance | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 919,819 | 985,374
Real estate – construction and development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,144,605 | 2,086,438
Loans 90 Days or More Past Due and Still Accruing | 0 | 500
Real estate – construction and development | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,190 | 30,162
Real estate – construction and development | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,727 | 25,367
Real estate – construction and development | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 0 | 3,829
Real estate – construction and development | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 463 | 966
Real estate – construction and development | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 2,142,415 | 2,056,276
Real estate – commercial and farmland |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 7,721,732 | 7,604,867
Loans 90 Days or More Past Due and Still Accruing | 0 | 0
Real estate – commercial and farmland | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 23,411 | 12,129
Real estate – commercial and farmland | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 6,723 | 1,738
Real estate – commercial and farmland | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,801 | 168
Real estate – commercial and farmland | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 10,887 | 10,223
Real estate – commercial and farmland | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 7,698,321 | 7,592,738
Real estate – residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 4,564,923 | 4,420,306
Loans 90 Days or More Past Due and Still Accruing | 0 | 0
Real estate – residential | Total Loans Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 154,680 | 152,514
Real estate – residential | Loans 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 33,775 | 35,015
Real estate – residential | Loans 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 9,199 | 11,329
Real estate – residential | Loans 90 or More Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 111,706 | 106,170
Real estate – residential | Current Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 4,410,243 | $ 4,267,792

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