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Non Purchased Loans - Aging of Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Past due and nonaccrual loans |  |
Total loans, gross | $ 9,057,522 | $ 9,086,256
Unearned income | (2,868) | (3,127)
Loans, net of unearned income | 9,054,654 | 9,083,129
Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Total loans, gross | 1,305,076 | 1,295,912
Loans, net of unearned income | 1,305,076 | 1,295,912
Lease financing |  |
Past due and nonaccrual loans |  |
Total loans, gross | 62,026 | 64,992
Real estate – construction |  |
Past due and nonaccrual loans |  |
Total loans, gross | 781,531 | 740,668
Loans, net of unearned income | 781,531 | 740,668
Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 2,765,472 | 2,795,343
Loans, net of unearned income | 2,765,472 | 2,795,343
Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 4,017,969 | 4,051,509
Loans, net of unearned income | 4,017,969 | 4,051,509
Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Total loans, gross | 125,448 | 137,832
Loans, net of unearned income | 184,606 | 199,697
Non purchased loans and leases |  |
Past due and nonaccrual loans |  |
Total loans, gross | 6,707,156 | 6,392,839
Unearned income | (2,868) | (3,127)
Loans, net of unearned income | 6,704,288 | 6,389,712
Non purchased loans and leases | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Total loans, gross | 930,598 | 875,649
Non purchased loans and leases | Lease financing |  |
Past due and nonaccrual loans |  |
Total loans, gross | 62,026 | 64,992
Non purchased loans and leases | Real estate – construction |  |
Past due and nonaccrual loans |  |
Total loans, gross | 716,129 | 635,519
Non purchased loans and leases | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 2,160,617 | 2,087,890
Non purchased loans and leases | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Total loans, gross | 2,741,402 | 2,628,365
Non purchased loans and leases | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Total loans, gross | 96,384 | 100,424
Non purchased loans and leases | Accruing Loans |  |
Past due and nonaccrual loans |  |
Current Loans | 6,671,187 | 6,359,292
Unearned income | (2,868) | (3,127)
Loans, net of unearned income | 6,690,020 | 6,379,494
Non purchased loans and leases | Accruing Loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Current Loans | 922,972 | 870,457
Total loans, gross | 925,072 | 874,121
Non purchased loans and leases | Accruing Loans | Lease financing |  |
Past due and nonaccrual loans |  |
Current Loans | 61,486 | 64,296
Total loans, gross | 61,956 | 64,992
Non purchased loans and leases | Accruing Loans | Real estate – construction |  |
Past due and nonaccrual loans |  |
Current Loans | 713,563 | 634,632
Total loans, gross | 716,129 | 635,519
Non purchased loans and leases | Accruing Loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Current Loans | 2,146,622 | 2,071,401
Total loans, gross | 2,156,228 | 2,083,930
Non purchased loans and leases | Accruing Loans | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Current Loans | 2,733,595 | 2,621,902
Total loans, gross | 2,737,208 | 2,623,795
Non purchased loans and leases | Accruing Loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Current Loans | 95,817 | 99,731
Total loans, gross | 96,295 | 100,264
Non purchased loans and leases | Nonaccruing Loans |  |
Past due and nonaccrual loans |  |
Current Loans | 3,603 | 2,814
Unearned income | 0 | 0
Loans, net of unearned income | 14,268 | 10,218
Non purchased loans and leases | Nonaccruing Loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Current Loans | 452 | 172
Total loans, gross | 5,526 | 1,528
Non purchased loans and leases | Nonaccruing Loans | Lease financing |  |
Past due and nonaccrual loans |  |
Current Loans | 0 | 0
Total loans, gross | 70 | 0
Non purchased loans and leases | Nonaccruing Loans | Real estate – construction |  |
Past due and nonaccrual loans |  |
Current Loans | 0 | 0
Total loans, gross | 0 | 0
Non purchased loans and leases | Nonaccruing Loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Current Loans | 1,368 | 1,046
Total loans, gross | 4,389 | 3,960
Non purchased loans and leases | Nonaccruing Loans | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Current Loans | 1,783 | 1,596
Total loans, gross | 4,194 | 4,570
Non purchased loans and leases | Nonaccruing Loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Current Loans | 0 | 0
Total loans, gross | 89 | 160
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans |  |
Past due and nonaccrual loans |  |
Loans past due | 14,658 | 17,517
Unearned income | 0 | 0
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Loans past due | 1,945 | 3,397
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Lease financing |  |
Past due and nonaccrual loans |  |
Loans past due | 470 | 607
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Real estate – construction |  |
Past due and nonaccrual loans |  |
Loans past due | 2,566 | 887
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 6,398 | 10,378
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 2,835 | 1,880
Non purchased loans and leases | 30-89 Days Past Due | Accruing Loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Loans past due | 444 | 368
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans |  |
Past due and nonaccrual loans |  |
Loans past due | 844 | 241
Unearned income | 0 | 0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Loans past due | 0 | 0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Lease financing |  |
Past due and nonaccrual loans |  |
Loans past due | 0 | 0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Real estate – construction |  |
Past due and nonaccrual loans |  |
Loans past due | 0 | 0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 772 | 238
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 68 | 0
Non purchased loans and leases | 30-89 Days Past Due | Nonaccruing Loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Loans past due | 4 | 3
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans |  |
Past due and nonaccrual loans |  |
Loans past due | 4,175 | 2,685
Unearned income | 0 | 0
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Loans past due | 155 | 267
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Lease financing |  |
Past due and nonaccrual loans |  |
Loans past due | 0 | 89
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Real estate – construction |  |
Past due and nonaccrual loans |  |
Loans past due | 0 | 0
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 3,208 | 2,151
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 778 | 13
Non purchased loans and leases | 90 Days or More Past Due | Accruing Loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Loans past due | 34 | 165
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans |  |
Past due and nonaccrual loans |  |
Loans past due | 9,821 | 7,163
Unearned income | 0 | 0
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Commercial, financial, agricultural |  |
Past due and nonaccrual loans |  |
Loans past due | 5,074 | 1,356
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Lease financing |  |
Past due and nonaccrual loans |  |
Loans past due | 70 | 0
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Real estate – construction |  |
Past due and nonaccrual loans |  |
Loans past due | 0 | 0
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Real estate – 1-4 family mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 2,249 | 2,676
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Real estate – commercial mortgage |  |
Past due and nonaccrual loans |  |
Loans past due | 2,343 | 2,974
Non purchased loans and leases | 90 Days or More Past Due | Nonaccruing Loans | Installment loans to individuals |  |
Past due and nonaccrual loans |  |
Loans past due | $ 85 | $ 157

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