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Purchased Loans - Deteriorated Loans (Details) - Purchased - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Impaired loans |  |  |
Recorded Investment With Allowance | $ 2,892 | $ 4,538 |
Recorded Investment With No Allowance | 5,672 | 1,847 |
Total Recorded Investment | 8,564 | 6,385 |
Unpaid Principal Balance With Allowance | 2,999 | 4,646 |
Unpaid Principal Balance With no Allowance | 6,204 | 2,028 |
Total Unpaid Principal Balance | 9,203 | 6,674 |
With Related Allowance | 107 | 515 |
With No Related Allowance | 0 | 0 |
Related Allowance | 107 | 515 |
Average Recorded Investment With Related Allowance | 2,943 | 4,617 |
Average Recorded Investment With No Related Allowance | 4,744 | 1,977 |
Average recorded investment in impaired loans | 7,687 | 6,594 | $ 2,860
Interest Income Recognized With Related Allowance | 65 | 120 |
Interest Income Recognized With No Related Allowance | 234 | 48 |
Interest Income, Total | 299 | 168 |
Commercial, financial, agricultural |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 625 | 487 |
Recorded Investment With No Allowance | 74 | 224 |
Unpaid Principal Balance With Allowance | 678 | 503 |
Unpaid Principal Balance With no Allowance | 79 | 229 |
With Related Allowance | 52 | 310 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 618 | 500 |
Average Recorded Investment With No Related Allowance | 75 | 172 |
Interest Income Recognized With Related Allowance | 21 | 2 |
Interest Income Recognized With No Related Allowance | 3 | 4 |
Lease financing |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 0 | 0 |
Recorded Investment With No Allowance | 0 | 0 |
Unpaid Principal Balance With Allowance | 0 | 0 |
Unpaid Principal Balance With no Allowance | 0 | 0 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 0 |
Average Recorded Investment With No Related Allowance | 0 | 0 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Real estate – construction |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 0 | 145 |
Recorded Investment With No Allowance | 1,199 | 0 |
Unpaid Principal Balance With Allowance | 0 | 147 |
Unpaid Principal Balance With no Allowance | 1,207 | 0 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 148 |
Average Recorded Investment With No Related Allowance | 318 | 0 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 47 | 0 |
Real estate – 1-4 family mortgage |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 1,385 | 1,496 |
Recorded Investment With No Allowance | 4,225 | 1,385 |
Unpaid Principal Balance With Allowance | 1,433 | 1,538 |
Unpaid Principal Balance With no Allowance | 4,740 | 1,557 |
With Related Allowance | 45 | 43 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 1,419 | 1,535 |
Average Recorded Investment With No Related Allowance | 4,161 | 1,550 |
Interest Income Recognized With Related Allowance | 18 | 7 |
Interest Income Recognized With No Related Allowance | 176 | 33 |
Real estate – commercial mortgage |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 728 | 2,275 |
Recorded Investment With No Allowance | 165 | 183 |
Unpaid Principal Balance With Allowance | 733 | 2,299 |
Unpaid Principal Balance With no Allowance | 168 | 186 |
With Related Allowance | 6 | 48 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 751 | 2,273 |
Average Recorded Investment With No Related Allowance | 177 | 194 |
Interest Income Recognized With Related Allowance | 26 | 111 |
Interest Income Recognized With No Related Allowance | 8 | 11 |
Installment loans to individuals |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 154 | 135 |
Recorded Investment With No Allowance | 9 | 55 |
Unpaid Principal Balance With Allowance | 155 | 159 |
Unpaid Principal Balance With no Allowance | 10 | 56 |
With Related Allowance | 4 | 114 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 155 | 161 |
Average Recorded Investment With No Related Allowance | 13 | 61 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Receivables Acquired with Deteriorated Credit Quality |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 87,484 | 89,257 |
Recorded Investment With No Allowance | 139,776 | 182,501 |
Total Recorded Investment | 227,260 | 271,758 |
Unpaid Principal Balance With Allowance | 92,483 | 99,504 |
Unpaid Principal Balance With no Allowance | 185,226 | 240,600 |
Total Unpaid Principal Balance | 277,709 | 340,104 |
With Related Allowance | 1,777 | 2,820 |
With No Related Allowance | 0 | 0 |
Related Allowance | 1,777 | 2,820 |
Average Recorded Investment With Related Allowance | 91,387 | 90,890 |
Average Recorded Investment With No Related Allowance | 161,785 | 227,142 |
Average recorded investment in impaired loans | 253,172 | 318,032 | 355,010
Interest Income Recognized With Related Allowance | 4,410 | 3,909 |
Interest Income Recognized With No Related Allowance | 8,459 | 10,623 | $ 17,828
Interest Income, Total | 12,869 | 14,532 |
Receivables Acquired with Deteriorated Credit Quality | Commercial, financial, agricultural |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 5,768 | 4,555 |
Recorded Investment With No Allowance | 9,547 | 7,439 |
Unpaid Principal Balance With Allowance | 6,004 | 5,038 |
Unpaid Principal Balance With no Allowance | 18,175 | 15,659 |
With Related Allowance | 312 | 372 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 5,672 | 4,728 |
Average Recorded Investment With No Related Allowance | 9,208 | 10,304 |
Interest Income Recognized With Related Allowance | 259 | 207 |
Interest Income Recognized With No Related Allowance | 989 | 819 |
Receivables Acquired with Deteriorated Credit Quality | Lease financing |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 0 | 0 |
Recorded Investment With No Allowance | 0 | 0 |
Unpaid Principal Balance With Allowance | 0 | 0 |
Unpaid Principal Balance With no Allowance | 0 | 0 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 0 |
Average Recorded Investment With No Related Allowance | 0 | 0 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 0 | 0 |
Receivables Acquired with Deteriorated Credit Quality | Real estate – construction |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 0 | 0 |
Recorded Investment With No Allowance | 0 | 840 |
Unpaid Principal Balance With Allowance | 0 | 0 |
Unpaid Principal Balance With no Allowance | 0 | 1,141 |
With Related Allowance | 0 | 0 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 0 | 0 |
Average Recorded Investment With No Related Allowance | 0 | 648 |
Interest Income Recognized With Related Allowance | 0 | 0 |
Interest Income Recognized With No Related Allowance | 0 | 38 |
Receivables Acquired with Deteriorated Credit Quality | Real estate – 1-4 family mortgage |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 15,910 | 21,887 |
Recorded Investment With No Allowance | 38,059 | 50,065 |
Unpaid Principal Balance With Allowance | 16,752 | 23,128 |
Unpaid Principal Balance With no Allowance | 48,297 | 63,597 |
With Related Allowance | 572 | 841 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 16,837 | 23,021 |
Average Recorded Investment With No Related Allowance | 46,983 | 64,306 |
Interest Income Recognized With Related Allowance | 793 | 1,015 |
Interest Income Recognized With No Related Allowance | 1,993 | 2,636 |
Receivables Acquired with Deteriorated Credit Quality | Real estate – commercial mortgage |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 65,108 | 62,449 |
Recorded Investment With No Allowance | 91,230 | 122,538 |
Unpaid Principal Balance With Allowance | 69,029 | 70,970 |
Unpaid Principal Balance With no Allowance | 117,691 | 158,105 |
With Related Allowance | 892 | 1,606 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 68,168 | 62,759 |
Average Recorded Investment With No Related Allowance | 104,485 | 149,917 |
Interest Income Recognized With Related Allowance | 3,333 | 2,674 |
Interest Income Recognized With No Related Allowance | 5,431 | 7,053 |
Receivables Acquired with Deteriorated Credit Quality | Installment loans to individuals |  |  |
Impaired loans |  |  |
Recorded Investment With Allowance | 698 | 366 |
Recorded Investment With No Allowance | 940 | 1,619 |
Unpaid Principal Balance With Allowance | 698 | 368 |
Unpaid Principal Balance With no Allowance | 1,063 | 2,098 |
With Related Allowance | 1 | 1 |
With No Related Allowance | 0 | 0 |
Average Recorded Investment With Related Allowance | 710 | 382 |
Average Recorded Investment With No Related Allowance | 1,109 | 1,967 |
Interest Income Recognized With Related Allowance | 25 | 13 |
Interest Income Recognized With No Related Allowance | $ 46 | $ 77 |

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