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Purchased Loans (Details 5) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Loan portfolio by risk-rating grades |  |
Total | $ 6,202,709 | $ 5,413,462
Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 717,490 | 636,837
Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 552,679 | 357,665
Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 1,878,177 | 1,735,323
Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 2,898,895 | 2,533,729
Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 155,468 | 149,908
Purchased |  |
Loan portfolio by risk-rating grades |  |
Total | 1,489,137 | 1,583,028
Purchased | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 901,252 | 893,088
Purchased | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 877,440 | 876,619
Purchased | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 21,120 | 9,934
Purchased | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 2,692 | 6,535
Purchased | Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 128,200 | 151,430
Purchased | Commercial, financial, agricultural | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 106,638 | 129,998
Purchased | Commercial, financial, agricultural | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 102,777 | 128,602
Purchased | Commercial, financial, agricultural | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 2,370 | 352
Purchased | Commercial, financial, agricultural | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 1,491 | 1,044
Purchased | Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 68,753 | 65,964
Purchased | Real estate – construction | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 63,846 | 49,436
Purchased | Real estate – construction | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 61,206 | 49,436
Purchased | Real estate – construction | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 2,640 | 0
Purchased | Real estate – construction | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Purchased | Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 452,447 | 531,095
Purchased | Real estate – 1-4 family mortgage | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 113,294 | 144,738
Purchased | Real estate – 1-4 family mortgage | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 105,265 | 136,417
Purchased | Real estate – 1-4 family mortgage | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 7,665 | 4,549
Purchased | Real estate – 1-4 family mortgage | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 364 | 3,772
Purchased | Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 823,758 | 804,680
Purchased | Real estate – commercial mortgage | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 617,360 | 568,916
Purchased | Real estate – commercial mortgage | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 608,192 | 562,164
Purchased | Real estate – commercial mortgage | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 8,445 | 5,033
Purchased | Real estate – commercial mortgage | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 723 | 1,719
Purchased | Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 15,979 | 29,859
Purchased | Installment loans to individuals | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 114 | 0
Purchased | Installment loans to individuals | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Purchased | Installment loans to individuals | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Purchased | Installment loans to individuals | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | $ 114 | $ 0

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