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Purchased Loans - Impaired Loans and Average Recorded Investment and Interest Income Recognized (Details) - Purchased - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | $ 10,329 |  | $ 10,329 |  | $ 9,580
Recorded Investment With Allowance | 6,911 |  | 6,911 |  | 4,869
Recorded Investment With No Allowance | 2,593 |  | 2,593 |  | 3,961
Total Recorded Investment | 9,504 |  | 9,504 |  | 8,830
Related Allowance | 315 |  | 315 |  | 537
Average Recorded Investment | 9,636 | $ 7,423 | 9,561 | $ 7,550 |
Interest Income Recognized | 43 | 49 | 141 | 160 |
Purchased with deteriorated credit quality |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 242,974 |  | 242,974 |  | 272,216
Recorded Investment With Allowance | 73,334 |  | 73,334 |  | 78,611
Recorded Investment With No Allowance | 114,780 |  | 114,780 |  | 143,643
Total Recorded Investment | 188,114 |  | 188,114 |  | 222,254
Related Allowance | 2,548 |  | 2,548 |  | 2,552
Average Recorded Investment | 191,110 | 207,050 | 197,449 | 211,356 |
Interest Income Recognized | 2,456 | 2,506 | 8,154 | 8,184 |
Commercial, financial, agricultural |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 2,565 |  | 2,565 |  | 671
Recorded Investment With Allowance | 2,495 |  | 2,495 |  | 600
Recorded Investment With No Allowance | 20 |  | 20 |  | 11
Total Recorded Investment | 2,515 |  | 2,515 |  | 611
Related Allowance | 282 |  | 282 |  | 173
Average Recorded Investment | 2,533 | 331 | 2,312 | 334 |
Interest Income Recognized | 2 | 3 | 6 | 8 |
Commercial, financial, agricultural | Purchased with deteriorated credit quality |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 54,354 |  | 54,354 |  | 44,403
Recorded Investment With Allowance | 3,417 |  | 3,417 |  | 3,779
Recorded Investment With No Allowance | 27,693 |  | 27,693 |  | 25,364
Total Recorded Investment | 31,110 |  | 31,110 |  | 29,143
Related Allowance | 128 |  | 128 |  | 161
Average Recorded Investment | 32,150 | 11,705 | 35,304 | 12,117 |
Interest Income Recognized | 283 | 162 | 1,145 | 579 |
Real estate – construction |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 256 |  | 256 |  | 576
Recorded Investment With Allowance | 256 |  | 256 |  | 576
Recorded Investment With No Allowance | 0 |  | 0 |  | 0
Total Recorded Investment | 256 |  | 256 |  | 576
Related Allowance | 2 |  | 2 |  | 5
Average Recorded Investment | 256 | 520 | 256 | 520 |
Interest Income Recognized | 0 | 1 | 3 | 2 |
Real estate – construction | Purchased with deteriorated credit quality |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 624 |  | 624 |  |
Recorded Investment With Allowance | 0 |  | 0 |  |
Recorded Investment With No Allowance | 605 |  | 605 |  |
Total Recorded Investment | 605 |  | 605 |  |
Related Allowance | 0 |  | 0 |  |
Average Recorded Investment | 558 | 0 | 560 | 0 |
Interest Income Recognized | 8 | 0 | 8 | 0 |
Real estate – 1-4 family mortgage |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 5,982 |  | 5,982 |  | 5,787
Recorded Investment With Allowance | 2,983 |  | 2,983 |  | 1,381
Recorded Investment With No Allowance | 2,282 |  | 2,282 |  | 3,780
Total Recorded Investment | 5,265 |  | 5,265 |  | 5,161
Related Allowance | 23 |  | 23 |  | 18
Average Recorded Investment | 5,364 | 4,817 | 5,468 | 4,907 |
Interest Income Recognized | 30 | 33 | 96 | 107 |
Real estate – 1-4 family mortgage | Purchased with deteriorated credit quality |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 45,511 |  | 45,511 |  | 53,823
Recorded Investment With Allowance | 11,203 |  | 11,203 |  | 12,169
Recorded Investment With No Allowance | 26,421 |  | 26,421 |  | 36,074
Total Recorded Investment | 37,624 |  | 37,624 |  | 48,243
Related Allowance | 350 |  | 350 |  | 488
Average Recorded Investment | 38,031 | 51,957 | 38,682 | 53,093 |
Interest Income Recognized | 538 | 621 | 1,699 | 1,941 |
Real estate – commercial mortgage |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 1,172 |  | 1,172 |  | 2,266
Recorded Investment With Allowance | 930 |  | 930 |  | 2,066
Recorded Investment With No Allowance | 208 |  | 208 |  | 146
Total Recorded Investment | 1,138 |  | 1,138 |  | 2,212
Related Allowance | 6 |  | 6 |  | 338
Average Recorded Investment | 1,150 | 1,511 | 1,185 | 1,545 |
Interest Income Recognized | 11 | 12 | 36 | 43 |
Real estate – commercial mortgage | Purchased with deteriorated credit quality |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 136,472 |  | 136,472 |  | 165,700
Recorded Investment With Allowance | 58,068 |  | 58,068 |  | 62,003
Recorded Investment With No Allowance | 57,714 |  | 57,714 |  | 78,435
Total Recorded Investment | 115,782 |  | 115,782 |  | 140,438
Related Allowance | 2,068 |  | 2,068 |  | 1,901
Average Recorded Investment | 117,179 | 141,780 | 119,327 | 144,530 |
Interest Income Recognized | 1,541 | 1,705 | 5,015 | 5,610 |
Installment loans to individuals |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 354 |  | 354 |  | 280
Recorded Investment With Allowance | 247 |  | 247 |  | 246
Recorded Investment With No Allowance | 83 |  | 83 |  | 24
Total Recorded Investment | 330 |  | 330 |  | 270
Related Allowance | 2 |  | 2 |  | 3
Average Recorded Investment | 333 | 244 | 340 | 244 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Installment loans to individuals | Purchased with deteriorated credit quality |  |  |  |  |
Impaired loans |  |  |  |  |
Unpaid Contractual Principal Balance | 6,013 |  | 6,013 |  | 8,290
Recorded Investment With Allowance | 646 |  | 646 |  | 660
Recorded Investment With No Allowance | 2,347 |  | 2,347 |  | 3,770
Total Recorded Investment | 2,993 |  | 2,993 |  | 4,430
Related Allowance | 2 |  | 2 |  | $ 2
Average Recorded Investment | 3,192 | 1,608 | 3,576 | 1,616 |
Interest Income Recognized | $ 86 | $ 18 | $ 287 | $ 54 |

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