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Purchased Loans - Summary of Purchased Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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Summary of loans |  |
Gross loans | $ 7,451,394 | $ 6,205,118
Unearned income | (2,786) | (2,409)
Loans, net of unearned income | 7,448,608 | 6,202,709
Purchased loans |  |
Summary of loans |  |
Gross loans | 2,155,141 | 1,489,137
Unearned income | 0 | 0
Loans, net of unearned income | 2,155,141 | 1,489,137
Commercial, financial, agricultural |  |
Summary of loans |  |
Gross loans | 1,008,935 | 717,490
Loans, net of unearned income | 1,008,935 | 717,490
Commercial, financial, agricultural | Purchased loans |  |
Summary of loans |  |
Gross loans | 301,100 | 128,200
Loans, net of unearned income | 301,100 | 128,200
Real estate – construction |  |
Summary of loans |  |
Gross loans | 577,720 | 552,679
Loans, net of unearned income | 577,720 | 552,679
Real estate – construction | Purchased loans |  |
Summary of loans |  |
Gross loans | 100,082 | 68,753
Loans, net of unearned income | 100,082 | 68,753
Real estate – 1-4 family mortgage |  |
Summary of loans |  |
Gross loans | 2,295,852 | 1,878,177
Loans, net of unearned income | 2,295,852 | 1,878,177
Real estate – 1-4 family mortgage | Purchased loans |  |
Summary of loans |  |
Gross loans | 651,792 | 452,447
Loans, net of unearned income | 651,792 | 452,447
Real estate – commercial mortgage |  |
Summary of loans |  |
Gross loans | 3,390,389 | 2,898,895
Loans, net of unearned income | 3,390,389 | 2,898,895
Real estate – commercial mortgage | Purchased loans |  |
Summary of loans |  |
Gross loans | 1,079,049 | 823,758
Loans, net of unearned income | 1,079,049 | 823,758
Installment loans to individuals |  |
Summary of loans |  |
Gross loans | 123,810 | 108,627
Loans, net of unearned income | 175,712 | 155,468
Installment loans to individuals | Purchased loans |  |
Summary of loans |  |
Gross loans | 23,118 | 15,979
Loans, net of unearned income | $ 23,118 | $ 15,979

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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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