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Non Purchased Loans - Loan Portfolio Not Subject to Risk Rating (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Loan portfolio not subject to risk rating |  |
Total | $ 9,122,907 | $ 7,620,322
Commercial, financial, agricultural |  |
Loan portfolio not subject to risk rating |  |
Total | 1,313,344 | 1,039,393
Real estate – construction |  |
Loan portfolio not subject to risk rating |  |
Total | 736,985 | 633,389
Real estate – 1-4 family mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 2,762,683 | 2,343,721
Real estate – commercial mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 4,112,585 | 3,427,530
Installment loans to individuals |  |
Loan portfolio not subject to risk rating |  |
Total | 197,310 | 176,289
Non purchased loans and leases |  |
Loan portfolio not subject to risk rating |  |
Total | 6,210,238 | 5,588,556
Non purchased loans and leases | Performing and Nonperforming |  |
Loan portfolio not subject to risk rating |  |
Total | 2,457,250 | 2,210,289
Non purchased loans and leases | Performing and Nonperforming | Commercial, financial, agricultural |  |
Loan portfolio not subject to risk rating |  |
Total | 204,009 | 192,982
Non purchased loans and leases | Performing and Nonperforming | Lease financing |  |
Loan portfolio not subject to risk rating |  |
Total | 54,272 | 54,013
Non purchased loans and leases | Performing and Nonperforming | Real estate – construction |  |
Loan portfolio not subject to risk rating |  |
Total | 66,353 | 63,417
Non purchased loans and leases | Performing and Nonperforming | Real estate – 1-4 family mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 1,695,749 | 1,465,689
Non purchased loans and leases | Performing and Nonperforming | Real estate – commercial mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 334,442 | 331,657
Non purchased loans and leases | Performing and Nonperforming | Installment loans to individuals |  |
Loan portfolio not subject to risk rating |  |
Total | 102,425 | 102,531
Non purchased loans and leases | Performing |  |
Loan portfolio not subject to risk rating |  |
Total | 2,449,712 | 2,203,941
Non purchased loans and leases | Performing | Commercial, financial, agricultural |  |
Loan portfolio not subject to risk rating |  |
Total | 202,633 | 191,473
Non purchased loans and leases | Performing | Lease financing |  |
Loan portfolio not subject to risk rating |  |
Total | 54,272 | 53,854
Non purchased loans and leases | Performing | Real estate – construction |  |
Loan portfolio not subject to risk rating |  |
Total | 66,353 | 63,417
Non purchased loans and leases | Performing | Real estate – 1-4 family mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 1,690,667 | 1,462,347
Non purchased loans and leases | Performing | Real estate – commercial mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 333,452 | 330,441
Non purchased loans and leases | Performing | Installment loans to individuals |  |
Loan portfolio not subject to risk rating |  |
Total | 102,335 | 102,409
Non purchased loans and leases | Non- Performing |  |
Loan portfolio not subject to risk rating |  |
Total | 7,538 | 6,348
Non purchased loans and leases | Non- Performing | Commercial, financial, agricultural |  |
Loan portfolio not subject to risk rating |  |
Total | 1,376 | 1,509
Non purchased loans and leases | Non- Performing | Lease financing |  |
Loan portfolio not subject to risk rating |  |
Total | 0 | 159
Non purchased loans and leases | Non- Performing | Real estate – construction |  |
Loan portfolio not subject to risk rating |  |
Total | 0 | 0
Non purchased loans and leases | Non- Performing | Real estate – 1-4 family mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 5,082 | 3,342
Non purchased loans and leases | Non- Performing | Real estate – commercial mortgage |  |
Loan portfolio not subject to risk rating |  |
Total | 990 | 1,216
Non purchased loans and leases | Non- Performing | Installment loans to individuals |  |
Loan portfolio not subject to risk rating |  |
Total | $ 90 | $ 122

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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