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Non Purchased Loans - Investment and Interest Income Recognized on Impaired Loans (Details) - Non purchased loans and leases - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | $ 26,216 | $ 19,469 | $ 26,688 | $ 19,937
Interest Income Recognized | 142 | 159 | 433 | 345
Commercial, financial, agricultural |  |  |  |
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 1,979 | 1,960 | 2,204 | 2,140
Interest Income Recognized | 11 | 8 | 31 | 8
Lease financing |  |  |  |
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 0 | 0 | 0 | 0
Interest Income Recognized | 0 | 0 | 0 | 0
Real estate – construction |  |  |  |
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 9,725 | 897 | 9,621 | 861
Interest Income Recognized | 42 | 33 | 109 | 36
Real estate – 1-4 family mortgage |  |  |  |
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 8,136 | 8,897 | 8,388 | 8,944
Interest Income Recognized | 51 | 71 | 174 | 165
Real estate – commercial mortgage |  |  |  |
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 6,258 | 7,575 | 6,354 | 7,844
Interest Income Recognized | 37 | 46 | 117 | 134
Installment loans to individuals |  |  |  |
Investment and interest income recognized on impaired loans |  |  |  |
Average Recorded Investment | 118 | 140 | 121 | 148
Interest Income Recognized | $ 1 | $ 1 | $ 2 | $ 2

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