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Purchased Loans (Details 5) - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Loan portfolio by risk-rating grades |  |
Total | $ 6,371,007 | $ 6,202,709
Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 760,582 | 717,490
Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 460,807 | 552,679
Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 1,952,394 | 1,878,177
Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 3,040,963 | 2,898,895
Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 156,261 | 155,468
Purchased loans |  |
Loan portfolio by risk-rating grades |  |
Total | 1,312,109 | 1,489,137
Purchased loans | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 783,030 | 901,252
Purchased loans | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 765,799 | 877,440
Purchased loans | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 15,642 | 21,120
Purchased loans | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 1,589 | 2,692
Purchased loans | Commercial, financial, agricultural | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 78,968 | 106,638
Purchased loans | Commercial, financial, agricultural | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 76,505 | 102,777
Purchased loans | Commercial, financial, agricultural | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 2,054 | 2,370
Purchased loans | Commercial, financial, agricultural | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 409 | 1,491
Purchased loans | Real estate – construction | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 35,007 | 63,846
Purchased loans | Real estate – construction | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 35,007 | 61,206
Purchased loans | Real estate – construction | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 2,640
Purchased loans | Real estate – construction | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Purchased loans | Real estate – 1-4 family mortgage | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 95,354 | 113,294
Purchased loans | Real estate – 1-4 family mortgage | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 89,147 | 105,265
Purchased loans | Real estate – 1-4 family mortgage | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 6,003 | 7,665
Purchased loans | Real estate – 1-4 family mortgage | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 204 | 364
Purchased loans | Real estate – commercial mortgage | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 573,697 | 617,360
Purchased loans | Real estate – commercial mortgage | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 565,140 | 608,192
Purchased loans | Real estate – commercial mortgage | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 7,585 | 8,445
Purchased loans | Real estate – commercial mortgage | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 972 | 723
Purchased loans | Installment loans to individuals | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 4 | 114
Purchased loans | Installment loans to individuals | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Purchased loans | Installment loans to individuals | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Purchased loans | Installment loans to individuals | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | $ 4 | $ 114

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