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Purchased Loans - Aging of Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Past due and nonaccrual loans |  |
Total loans, gross | $ 9,773,049 | $ 9,693,463
Loans, net of unearned income | 9,769,377 | 9,689,638
Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Total loans, gross | 1,424,576 | 1,367,972
Loans, net of unearned income |  | 1,367,972
Real estate – construction: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 787,895 | 826,483
Loans, net of unearned income |  | 826,483
Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 2,846,301 | 2,866,613
Loans, net of unearned income |  | 2,866,613
Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 4,308,708 | 4,244,265
Loans, net of unearned income |  | 4,244,265
Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Total loans, gross | 317,218 | 302,430
Loans, net of unearned income |  | 384,305
Residential | Real estate – construction: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 289,000 | 289,050
Commercial | Real estate – construction: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 498,895 | 537,433
Primary | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 1,776,436 | 1,781,948
Home equity | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 563,726 | 573,540
Rental/investment | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 329,466 | 335,100
Land development | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 176,673 | 176,025
Land development | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 160,768 | 156,089
Owner-occupied | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 1,662,998 | 1,637,281
Non-owner occupied | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 2,484,942 | 2,450,895
Purchased loans |  |
Past due and nonaccrual loans |  |
Loans, net of unearned income | 1,966,973 | 2,101,664
Purchased loans | Accruing loans |  |
Past due and nonaccrual loans |  |
Current Loans | 1,928,351 | 2,075,422
Loans, net of unearned income | 1,947,883 | 2,094,626
Purchased loans | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Loans past due | 14,428 | 14,887
Purchased loans | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Loans past due | 5,104 | 4,317
Purchased loans | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current Loans | 8,911 | 2,250
Loans, net of unearned income | 19,090 | 7,038
Purchased loans | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Loans past due | 2,595 | 606
Purchased loans | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Loans past due | 7,584 | 4,182
Purchased loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Total loans, gross | 280,572 | 315,619
Purchased loans | Commercial, financial, agricultural | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 269,348 | 311,218
Total loans, gross | 274,616 | 314,105
Purchased loans | Commercial, financial, agricultural | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 2,284 | 1,889
Purchased loans | Commercial, financial, agricultural | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 2,984 | 998
Purchased loans | Commercial, financial, agricultural | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 3,585 | 268
Total loans, gross | 5,956 | 1,514
Purchased loans | Commercial, financial, agricultural | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 820 | 0
Purchased loans | Commercial, financial, agricultural | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 1,551 | 1,246
Purchased loans | Real estate – construction: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 42,829 | 51,582
Purchased loans | Real estate – construction: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 42,182 | 51,263
Total loans, gross | 42,829 | 51,582
Purchased loans | Real estate – construction: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 647 | 319
Purchased loans | Real estate – construction: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 | 0
Purchased loans | Real estate – construction: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 0 | 0
Total loans, gross | 0 | 0
Purchased loans | Real estate – construction: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 | 0
Purchased loans | Real estate – construction: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 | 0
Purchased loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 489,674 | 516,487
Purchased loans | Real estate – 1-4 family mortgage | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 474,980 | 503,826
Total loans, gross | 481,118 | 511,586
Purchased loans | Real estate – 1-4 family mortgage | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 5,727 | 5,516
Purchased loans | Real estate – 1-4 family mortgage | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 411 | 2,244
Purchased loans | Real estate – 1-4 family mortgage | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 2,090 | 1,534
Total loans, gross | 8,556 | 4,901
Purchased loans | Real estate – 1-4 family mortgage | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 1,492 | 605
Purchased loans | Real estate – 1-4 family mortgage | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 4,974 | 2,762
Purchased loans | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 1,066,536 | 1,115,389
Purchased loans | Real estate – commercial mortgage: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 1,058,128 | 1,110,570
Total loans, gross | 1,062,226 | 1,114,946
Purchased loans | Real estate – commercial mortgage: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 2,479 | 3,454
Purchased loans | Real estate – commercial mortgage: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 1,619 | 922
Purchased loans | Real estate – commercial mortgage: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 3,052 | 320
Total loans, gross | 4,310 | 443
Purchased loans | Real estate – commercial mortgage: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 272 | 0
Purchased loans | Real estate – commercial mortgage: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 986 | 123
Purchased loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Total loans, gross | 87,362 | 102,587
Purchased loans | Installment loans to individuals | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 83,713 | 98,545
Total loans, gross | 87,094 | 102,407
Purchased loans | Installment loans to individuals | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 3,291 | 3,709
Purchased loans | Installment loans to individuals | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 90 | 153
Purchased loans | Installment loans to individuals | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 184 | 128
Total loans, gross | 268 | 180
Purchased loans | Installment loans to individuals | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 11 | 1
Purchased loans | Installment loans to individuals | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 73 | 51
Purchased loans | Residential | Real estate – construction: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 11,449 | 16,407
Purchased loans | Residential | Real estate – construction: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 10,802 |
Total loans, gross | 11,449 |
Purchased loans | Residential | Real estate – construction: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 647 |
Purchased loans | Residential | Real estate – construction: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Residential | Real estate – construction: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 0 |
Total loans, gross | 0 |
Purchased loans | Residential | Real estate – construction: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Residential | Real estate – construction: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Commercial | Real estate – construction: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 31,380 | 35,175
Purchased loans | Commercial | Real estate – construction: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 31,380 |
Total loans, gross | 31,380 |
Purchased loans | Commercial | Real estate – construction: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Commercial | Real estate – construction: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Commercial | Real estate – construction: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 0 |
Total loans, gross | 0 |
Purchased loans | Commercial | Real estate – construction: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Commercial | Real estate – construction: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Primary | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 309,549 | 332,729
Purchased loans | Primary | Real estate – 1-4 family mortgage | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 297,809 |
Total loans, gross | 303,628 |
Purchased loans | Primary | Real estate – 1-4 family mortgage | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 5,507 |
Purchased loans | Primary | Real estate – 1-4 family mortgage | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 312 |
Purchased loans | Primary | Real estate – 1-4 family mortgage | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 966 |
Total loans, gross | 5,921 |
Purchased loans | Primary | Real estate – 1-4 family mortgage | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 1,191 |
Purchased loans | Primary | Real estate – 1-4 family mortgage | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 3,764 |
Purchased loans | Home equity | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 114,463 | 117,275
Purchased loans | Home equity | Real estate – 1-4 family mortgage | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 112,902 |
Total loans, gross | 113,036 |
Purchased loans | Home equity | Real estate – 1-4 family mortgage | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 65 |
Purchased loans | Home equity | Real estate – 1-4 family mortgage | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 69 |
Purchased loans | Home equity | Real estate – 1-4 family mortgage | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 749 |
Total loans, gross | 1,427 |
Purchased loans | Home equity | Real estate – 1-4 family mortgage | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 200 |
Purchased loans | Home equity | Real estate – 1-4 family mortgage | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 478 |
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 44,222 | 43,169
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 43,214 |
Total loans, gross | 43,346 |
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 102 |
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 30 |
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 90 |
Total loans, gross | 876 |
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 54 |
Purchased loans | Rental/investment | Real estate – 1-4 family mortgage | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 732 |
Purchased loans | Land development | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 21,440 | 23,314
Purchased loans | Land development | Real estate – 1-4 family mortgage | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 21,055 |
Total loans, gross | 21,108 |
Purchased loans | Land development | Real estate – 1-4 family mortgage | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 53 |
Purchased loans | Land development | Real estate – 1-4 family mortgage | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Land development | Real estate – 1-4 family mortgage | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 285 |
Total loans, gross | 332 |
Purchased loans | Land development | Real estate – 1-4 family mortgage | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 47 |
Purchased loans | Land development | Real estate – 1-4 family mortgage | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Land development | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 38,074 |
Purchased loans | Land development | Real estate – commercial mortgage: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 36,980 |
Total loans, gross | 37,656 |
Purchased loans | Land development | Real estate – commercial mortgage: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 604 |
Purchased loans | Land development | Real estate – commercial mortgage: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 72 |
Purchased loans | Land development | Real estate – commercial mortgage: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 254 |
Total loans, gross | 418 |
Purchased loans | Land development | Real estate – commercial mortgage: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 0 |
Purchased loans | Land development | Real estate – commercial mortgage: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 164 |
Purchased loans | Owner-occupied | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 418,079 | 428,077
Purchased loans | Owner-occupied | Real estate – commercial mortgage: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 412,188 |
Total loans, gross | 415,041 |
Purchased loans | Owner-occupied | Real estate – commercial mortgage: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 1,356 |
Purchased loans | Owner-occupied | Real estate – commercial mortgage: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 1,497 |
Purchased loans | Owner-occupied | Real estate – commercial mortgage: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 2,652 |
Total loans, gross | 3,038 |
Purchased loans | Owner-occupied | Real estate – commercial mortgage: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 261 |
Purchased loans | Owner-occupied | Real estate – commercial mortgage: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 125 |
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: |  |
Past due and nonaccrual loans |  |
Total loans, gross | 610,383 | $ 647,308
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: | Accruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 608,960 |
Total loans, gross | 609,529 |
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: | Accruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 519 |
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: | Accruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 50 |
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: | Nonaccruing loans |  |
Past due and nonaccrual loans |  |
Current, gross | 146 |
Total loans, gross | 854 |
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: | Nonaccruing loans | 30-89 Days Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | 11 |
Purchased loans | Non-owner occupied | Real estate – commercial mortgage: | Nonaccruing loans | 90 Days or More Past Due |  |
Past due and nonaccrual loans |  |
Past due, gross | $ 697 |

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