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Loans and Allowance - Composition of Impaired Loans by Loan Class (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | $ 23,414 |  | $ 14,555
Impaired loans with related allowance | 4,567 |  | 10,501
Total Impaired Loans | 27,981 |  | 25,056
Recorded Investment |  |  |
Impaired loans with no related allowance | 19,415 |  | 11,594
Impaired loans with related allowance | 4,472 |  | 10,431
Total Impaired Loans | 23,887 |  | 22,025
Related Allowance | 1,599 |  | 1,872
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 20,149 | $ 17,714 |
Impaired loans with related allowance | 4,576 | 4,598 |
Total Impaired Loans | 24,725 | 22,312 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance | 40 | 54 |
Impaired loans with related allowance | 18 | 14 |
Total Impaired Loans | 58 | 68 |
Commercial and industrial loans |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 1,920 |  | 828
Recorded Investment |  |  |
Impaired loans with no related allowance | 1,626 |  | 806
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 1,641 | 1,845 |
Impaired loans with related allowance | 0 | 465 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance | 0 | 0 |
Impaired loans with related allowance | 0 | 0 |
Agricultural production financing and other loans to farmers |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 807 |  | 679
Impaired loans with related allowance | 2,167 |  |
Recorded Investment |  |  |
Impaired loans with no related allowance | 792 |  | 679
Impaired loans with related allowance | 2,117 |  |
Related Allowance | 1,172 |  |
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 799 | 640 |
Impaired loans with related allowance | 2,150 | 0 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance | 0 | 0 |
Impaired loans with related allowance | 0 | 0 |
Construction |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 9,330 |  | 1,352
Impaired loans with related allowance |  |  | 7,978
Recorded Investment |  |  |
Impaired loans with no related allowance | 7,524 |  | 614
Impaired loans with related allowance |  |  | 7,977
Related Allowance |  |  | 1,429
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 8,270 | 0 |
Impaired loans with related allowance | 0 | 1,352 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance | 0 | 0 |
Commercial and farmland |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 10,838 |  | 11,176
Impaired loans with related allowance | 171 |  | 171
Recorded Investment |  |  |
Impaired loans with no related allowance | 8,973 |  | 8,994
Impaired loans with related allowance | 171 |  | 171
Related Allowance | 6 |  | 6
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 8,999 | 14,450 |
Impaired loans with related allowance | 171 | 767 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance | 39 | 48 |
Residential |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 118 |  | 118
Impaired loans with related allowance | 1,843 |  | 1,958
Recorded Investment |  |  |
Impaired loans with no related allowance | 99 |  | 100
Impaired loans with related allowance | 1,815 |  | 1,907
Related Allowance | 348 |  | 362
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 38 | 759 |
Impaired loans with related allowance | 1,884 | 1,709 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance | 1 | 6 |
Impaired loans with related allowance | 15 | 12 |
Home equity |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 48 |  | 49
Impaired loans with related allowance | 371 |  | 376
Recorded Investment |  |  |
Impaired loans with no related allowance | 48 |  | 48
Impaired loans with related allowance | 354 |  | 358
Related Allowance | 72 |  | 74
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 48 | 8 |
Impaired loans with related allowance | 356 | 305 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance |  | 0 |
Impaired loans with related allowance | 3 | 2 |
Individuals' loans for household and other personal expenditures |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with related allowance | 15 |  | 18
Recorded Investment |  |  |
Impaired loans with related allowance | 15 |  | 18
Related Allowance | 1 |  | 1
Average Recorded Investment |  |  |
Impaired loans with no related allowance | 1 | 12 |
Impaired loans with related allowance | 15 | 0 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance |  | 0 |
Impaired loans with related allowance |  | 0 |
Public finance and other commercial loans |  |  |
Unpaid Principal Balance |  |  |
Impaired loans with no related allowance | 353 |  | 353
Recorded Investment |  |  |
Impaired loans with no related allowance | 353 |  | $ 353
Average Recorded Investment |  |  |
Impaired loans with no related allowance | $ 353 | 0 |
Interest Income Recognized |  |  |
Impaired loans with no related allowance |  | $ 0 |

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