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Purchased Loans - Impaired Loans and Average Recorded Investment and Interest Income Recognized (Details) - Purchased - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Impaired loans |  |  |
Unpaid Contractual Principal Balance | $ 8,677 |  | $ 9,203
Recorded Investment With Allowance | 3,366 |  | 2,892
Recorded Investment With No Allowance | 4,654 |  | 5,672
Total Recorded Investment | 8,020 |  | 8,564
Related Allowance | 170 |  | 107
Average Recorded Investment | 8,737 | $ 9,197 |
Interest Income Recognized | 62 | 58 |
Receivables Acquired with Deteriorated Credit Quality |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 262,379 |  | 277,709
Recorded Investment With Allowance | 86,243 |  | 87,484
Recorded Investment With No Allowance | 128,067 |  | 139,776
Total Recorded Investment | 214,310 |  | 227,260
Related Allowance | 1,817 |  | 1,777
Average Recorded Investment | 244,700 | 291,340 |
Interest Income Recognized | 2,888 | 3,452 |
Commercial, financial, agricultural |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 421 |  | 757
Recorded Investment With Allowance | 336 |  | 625
Recorded Investment With No Allowance | 21 |  | 74
Total Recorded Investment | 357 |  | 699
Related Allowance | 49 |  | 52
Average Recorded Investment | 363 | 541 |
Interest Income Recognized | 3 | 2 |
Commercial, financial, agricultural | Receivables Acquired with Deteriorated Credit Quality |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 21,363 |  | 24,179
Recorded Investment With Allowance | 5,414 |  | 5,768
Recorded Investment With No Allowance | 7,519 |  | 9,547
Total Recorded Investment | 12,933 |  | 15,315
Related Allowance | 305 |  | 312
Average Recorded Investment | 16,899 | 14,088 |
Interest Income Recognized | 225 | 247 |
Real estate – construction |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 252 |  | 1,207
Recorded Investment With Allowance | 0 |  | 0
Recorded Investment With No Allowance | 249 |  | 1,199
Total Recorded Investment | 249 |  | 1,199
Related Allowance | 0 |  | 0
Average Recorded Investment | 252 | 0 |
Interest Income Recognized | 1 | 0 |
Real estate – 1-4 family mortgage |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 6,195 |  | 6,173
Recorded Investment With Allowance | 1,493 |  | 1,385
Recorded Investment With No Allowance | 4,133 |  | 4,225
Total Recorded Investment | 5,626 |  | 5,610
Related Allowance | 47 |  | 45
Average Recorded Investment | 6,320 | 5,481 |
Interest Income Recognized | 40 | 21 |
Real estate – 1-4 family mortgage | Receivables Acquired with Deteriorated Credit Quality |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 60,590 |  | 65,049
Recorded Investment With Allowance | 16,093 |  | 15,910
Recorded Investment With No Allowance | 34,103 |  | 38,059
Total Recorded Investment | 50,196 |  | 53,969
Related Allowance | 486 |  | 572
Average Recorded Investment | 58,749 | 78,341 |
Interest Income Recognized | 673 | 865 |
Real estate – commercial mortgage |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 1,647 |  | 901
Recorded Investment With Allowance | 1,384 |  | 728
Recorded Investment With No Allowance | 245 |  | 165
Total Recorded Investment | 1,629 |  | 893
Related Allowance | 70 |  | 6
Average Recorded Investment | 1,642 | 3,090 |
Interest Income Recognized | 18 | 35 |
Real estate – commercial mortgage | Receivables Acquired with Deteriorated Credit Quality |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 178,682 |  | 186,720
Recorded Investment With Allowance | 63,979 |  | 65,108
Recorded Investment With No Allowance | 85,568 |  | 91,230
Total Recorded Investment | 149,547 |  | 156,338
Related Allowance | 1,023 |  | 892
Average Recorded Investment | 167,365 | 196,807 |
Interest Income Recognized | 1,972 | 2,319 |
Installment loans to individuals |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 162 |  | 165
Recorded Investment With Allowance | 153 |  | 154
Recorded Investment With No Allowance | 6 |  | 9
Total Recorded Investment | 159 |  | 163
Related Allowance | 4 |  | 4
Average Recorded Investment | 160 | 85 |
Interest Income Recognized | 0 | 0 |
Installment loans to individuals | Receivables Acquired with Deteriorated Credit Quality |  |  |
Impaired loans |  |  |
Unpaid Contractual Principal Balance | 1,744 |  | 1,761
Recorded Investment With Allowance | 757 |  | 698
Recorded Investment With No Allowance | 877 |  | 940
Total Recorded Investment | 1,634 |  | 1,638
Related Allowance | 3 |  | $ 1
Average Recorded Investment | 1,687 | 2,104 |
Interest Income Recognized | $ 18 | $ 21 |

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