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Non Purchased Loans - (Details 6) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Loan portfolio by risk-rating grades |  |
Total | $ 6,235,805 | $ 6,202,709
Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 741,466 | 717,490
Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 413,734 | 552,679
Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 1,917,567 | 1,878,177
Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 3,008,429 | 2,898,895
Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 154,609 | 155,468
Non purchased loans and leases |  |
Loan portfolio by risk-rating grades |  |
Total | 4,834,085 | 4,713,572
Non purchased loans and leases | Internal Noninvestment Grade |  |
Loan portfolio by risk-rating grades |  |
Total | 2,908,235 | 2,808,367
Non purchased loans and leases | Internal Noninvestment Grade | Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 473,760 | 439,704
Non purchased loans and leases | Internal Noninvestment Grade | Lease financing |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Internal Noninvestment Grade | Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 329,547 | 402,549
Non purchased loans and leases | Internal Noninvestment Grade | Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 214,895 | 200,385
Non purchased loans and leases | Internal Noninvestment Grade | Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 1,890,033 | 1,765,729
Non purchased loans and leases | Internal Noninvestment Grade | Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Pass |  |
Loan portfolio by risk-rating grades |  |
Total | 2,865,371 | 2,761,884
Non purchased loans and leases | Pass | Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 470,252 | 434,323
Non purchased loans and leases | Pass | Lease financing |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Pass | Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 329,322 | 402,156
Non purchased loans and leases | Pass | Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 205,083 | 190,882
Non purchased loans and leases | Pass | Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 1,860,714 | 1,734,523
Non purchased loans and leases | Pass | Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Watch |  |
Loan portfolio by risk-rating grades |  |
Total | 22,076 | 26,416
Non purchased loans and leases | Watch | Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 1,846 | 4,531
Non purchased loans and leases | Watch | Lease financing |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Watch | Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 225 | 393
Non purchased loans and leases | Watch | Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 3,739 | 3,374
Non purchased loans and leases | Watch | Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 16,266 | 18,118
Non purchased loans and leases | Watch | Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Substandard |  |
Loan portfolio by risk-rating grades |  |
Total | 20,788 | 20,067
Non purchased loans and leases | Substandard | Commercial, financial, agricultural |  |
Loan portfolio by risk-rating grades |  |
Total | 1,662 | 850
Non purchased loans and leases | Substandard | Lease financing |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Substandard | Real estate – construction |  |
Loan portfolio by risk-rating grades |  |
Total | 0 | 0
Non purchased loans and leases | Substandard | Real estate – 1-4 family mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 6,073 | 6,129
Non purchased loans and leases | Substandard | Real estate – commercial mortgage |  |
Loan portfolio by risk-rating grades |  |
Total | 13,053 | 13,088
Non purchased loans and leases | Substandard | Installment loans to individuals |  |
Loan portfolio by risk-rating grades |  |
Total | $ 0 | $ 0

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