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Loans and Allowance for Loan Losses - Table of loan payment estimates (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 30, 2017 | Jan. 03, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | $ (5,064) | $ (4,604) | $ (4,627) | $ (3,395)
Contractual principal and interest | $ 113,584 |  | 452,818 | 626,691 |  |
Non-accretable difference | (27,248) |  | (13,938) | (24,818) |  |
Cash flows expected to be collected | 86,336 |  | 438,880 | 601,873 |  |
Accretable Yield |  |  | (82,098) | (116,754) |  |
Accretable difference | (7,369) |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance | 78,967 |  | 361,846 | 489,723 | 623,430 |
Acquired loans, net |  |  | 356,782 | 485,119 | 618,803 |
Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 1,760,427 | 2,594,826 |  |
After fair value adjustment |  |  | 1,800 |  |  |
Acquired non-credit impaired loans accounted under FASB 310 20 | Park Sterling Corporation |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Contractual principal and interest | 2,200,000 |  |  |  |  |
After fair value adjustment | 2,100,000 |  |  |  |  |
Fair value adjustment | $ 46,500,000 |  |  |  |  |
Acquired non-credit impaired loans accounted under FASB 310 20 | Southeastern Bank Financial |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Contractual principal and interest |  | $ 78,963 |  |  |  |
Non-accretable difference |  | (13,072) |  |  |  |
Cash flows expected to be collected |  | 65,891 |  |  |  |
Accretable difference |  | (4,910) |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  | 60,981 |  |  |  |
Acquired credit impaired loans accounted under FASB 310 30 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | (5,064) | (4,604) |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 361,846 | 489,723 |  |
Acquired loans, net |  |  | 356,782 | 485,119 |  |
Acquired loans accounted under FASB ASC 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Contractual principal and interest |  |  | 1,800,000 | 2,600,000 |  |
After fair value adjustment |  |  |  | 2,600,000 |  |
Fair value adjustment |  |  | 20,300 | 33,400 |  |
Acquired credit impaired and non-impaired loans accounted under FASB ASC Topic 310-20 | Southeastern Bank Financial |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Contractual principal and interest |  | 1,000,000 |  |  |  |
After fair value adjustment |  | 986,500 |  |  |  |
Fair value adjustment |  | $ 18,800 |  |  |  |
Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 1,760,427 | 2,594,826 |  |
Residential real estate |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 163,359 | 207,482 |  |
Residential real estate | Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | (2,555) | (2,246) | (3,553) | (2,419)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 163,359 | 207,482 | 260,787 |
Residential real estate | Acquired credit impaired loans accounted under FASB 310 30 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 163,359 | 207,482 |  |
Commercial non-owner occupied real estate | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 481,010 | 844,323 |  |
Commercial owner occupied real estate loan | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 307,193 | 421,841 |  |
Commercial owner occupied real estate loan | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 307,193 | 421,841 |  |
Consumer loans | Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | (539) | (761) | (461) | (558)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 35,488 | 42,492 | 51,453 |
Consumer loans | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 685,163 | 871,238 |  |
Consumer loans | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 774,647 | 983,015 |  |
Commercial and industrial |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 7,029 | 10,043 |  |
Commercial and industrial | Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | (24) | (79) | (145) | (238)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 7,029 | 10,043 | 26,946 |
Commercial and industrial | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 101,880 | 212,537 |  |
Commercial and industrial | Acquired credit impaired loans accounted under FASB 310 30 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 7,029 | 10,043 |  |
Commercial and industrial | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 101,880 | 212,537 |  |
Other income producing property | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 95,697 | 133,110 |  |
Other income producing property | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 95,697 | 133,110 |  |
Consumer |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 35,488 | 42,492 |  |
Consumer | Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 35,488 | 42,492 |  |
Consumer | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 89,484 | 111,777 |  |
Consumer | Acquired credit impaired loans accounted under FASB 310 30 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 35,488 | 42,492 |  |
Consumer | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 89,484 | 111,777 |  |
Commercial loans | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 985,780 | 1,611,811 |  |
Construction and land development | Commercial non-owner occupied real estate | Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | (569) | (717) | (180) | (139)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 25,032 | 32,942 | 49,649 |
Construction and land development | Commercial non-owner occupied real estate | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 33,569 | 165,070 |  |
Construction and land development | Commercial non-owner occupied real estate | Acquired credit impaired loans accounted under FASB 310 30 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 25,032 | 32,942 |  |
Construction and land development | Commercial non-owner occupied real estate | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 33,569 | 165,070 |  |
Other commercial non-owner occupied real estate | Commercial non-owner occupied real estate | Acquired credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Allowance for loan losses on acquired loans |  |  | (1,377) | (801) | (288) | $ (41)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 130,938 | 196,764 | $ 234,595 |
Other commercial non-owner occupied real estate | Commercial non-owner occupied real estate | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 447,441 | 679,253 |  |
Other commercial non-owner occupied real estate | Commercial non-owner occupied real estate | Acquired credit impaired loans accounted under FASB 310 30 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 130,938 | 196,764 |  |
Other commercial non-owner occupied real estate | Commercial non-owner occupied real estate | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 447,441 | 679,253 |  |
Home equity loans | Consumer loans | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 188,732 | 242,425 |  |
Home equity loans | Consumer loans | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 188,732 | 242,425 |  |
Other Consumer | Consumer loans | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 89,484 | 111,777 |  |
Consumer Owner Occupied Loans | Consumer loans | Acquired non-credit impaired loans accounted under FASB 310 20 |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | 496,431 | 628,813 |  |
Consumer Owner Occupied Loans | Consumer loans | Acquired non-credit impaired loans |  |  |  |  |  |
Contractual loan payments receivable, estimates of amounts not expected to be collected, other fair value adjustments and the resulting fair values of acquired loans |  |  |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance |  |  | $ 496,431 | $ 628,813 |  |

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- Definition The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References No definition available. + Details
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