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Non Purchased Loans - Summary of Non-purchased Loans and Leases (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Summary of loans |  |
Gross loans | $ 7,623,663 | $ 6,205,118
Unearned income | (3,341) | (2,409)
Loans, net of unearned income | 7,620,322 | 6,202,709
Commercial, financial, agricultural |  |
Summary of loans |  |
Gross loans | 1,039,393 | 717,490
Loans, net of unearned income | 1,039,393 | 717,490
Lease financing |  |
Summary of loans |  |
Gross loans | 57,354 | 49,250
Real estate – construction |  |
Summary of loans |  |
Gross loans | 633,389 | 552,679
Loans, net of unearned income | 633,389 | 552,679
Real estate – 1-4 family mortgage |  |
Summary of loans |  |
Gross loans | 2,343,721 | 1,878,177
Loans, net of unearned income | 2,343,721 | 1,878,177
Real estate – commercial mortgage |  |
Summary of loans |  |
Gross loans | 3,427,530 | 2,898,895
Loans, net of unearned income | 3,427,530 | 2,898,895
Installment loans to individuals |  |
Summary of loans |  |
Gross loans | 122,276 | 108,627
Loans, net of unearned income | 176,289 | 155,468
Non-Purchased |  |
Summary of loans |  |
Gross loans | 5,591,897 | 4,715,981
Unearned income | (3,341) | (2,409)
Loans, net of unearned income | 5,588,556 | 4,713,572
Non-Purchased | Commercial, financial, agricultural |  |
Summary of loans |  |
Gross loans | 763,823 | 589,290
Non-Purchased | Lease financing |  |
Summary of loans |  |
Gross loans | 57,354 | 49,250
Non-Purchased | Real estate – construction |  |
Summary of loans |  |
Gross loans | 547,658 | 483,926
Non-Purchased | Real estate – 1-4 family mortgage |  |
Summary of loans |  |
Gross loans | 1,729,534 | 1,425,730
Non-Purchased | Real estate – commercial mortgage |  |
Summary of loans |  |
Gross loans | 2,390,076 | 2,075,137
Non-Purchased | Installment loans to individuals |  |
Summary of loans |  |
Gross loans | $ 103,452 | $ 92,648

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- Definition Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159169&loc=d3e10152-111534 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84165051&loc=d3e45377-112738 + Details
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