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Loans and Allowance for Credit Losses - Composition of Impaired Loans by Loan Class (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Unpaid Principal Balance |  |
Impaired loans with no related allowance | $ 9,101 | $ 9,955
Impaired loans with related allowance | 49,513 | 5,139
Total Impaired Loans | 58,614 | 15,094
Recorded Investment |  |
Impaired loans with no related allowance | 7,813 | 7,352
Impaired loans with related allowance | 48,343 | 4,357
Total Impaired Loans | 56,156 | 11,709
Related Allowance | 12,901 | 689
Average Recorded Investment |  |
Impaired loans with no related allowance | 8,113 | 7,924
Impaired loans with related allowance | 49,003 | 4,405
Total Impaired Loans | 57,116 | 12,329
Interest Income Recognized |  |
Impaired loans with no related allowance | 148 | 159
Impaired loans with related allowance | 84 | 75
Total Impaired Loans | 232 | 234
Commercial and industrial loans |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance | 1,059 | 320
Impaired loans with related allowance | 268 |
Recorded Investment |  |
Impaired loans with no related allowance | 991 | 320
Impaired loans with related allowance | 268 |
Related Allowance | 223 |
Average Recorded Investment |  |
Impaired loans with no related allowance | 991 | 320
Impaired loans with related allowance | 267 |
Interest Income Recognized |  |
Impaired loans with no related allowance | 0 | 0
Impaired loans with related allowance | 0 |
Agricultural land, production and other loans to farmers |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance |  | 752
Impaired loans with related allowance | 640 | 588
Recorded Investment |  |
Impaired loans with no related allowance |  | 381
Impaired loans with related allowance | 562 | 585
Related Allowance | 3 | 107
Average Recorded Investment |  |
Impaired loans with no related allowance |  | 542
Impaired loans with related allowance | 589 | 585
Interest Income Recognized |  |
Impaired loans with no related allowance |  | 0
Impaired loans with related allowance | 0 | 0
Construction |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance |  | 1,206
Recorded Investment |  |
Impaired loans with no related allowance |  | 970
Average Recorded Investment |  |
Impaired loans with no related allowance |  | 1,229
Interest Income Recognized |  |
Impaired loans with no related allowance |  | 0
Commercial real estate, non-owner occupied |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance | 4,958 | 6,202
Impaired loans with related allowance | 44,016 |
Recorded Investment |  |
Impaired loans with no related allowance | 4,694 | 5,299
Impaired loans with related allowance | 43,715 |
Related Allowance | 11,686 |
Average Recorded Investment |  |
Impaired loans with no related allowance | 4,850 | 5,399
Impaired loans with related allowance | 44,119 |
Interest Income Recognized |  |
Impaired loans with no related allowance | 145 | 156
Impaired loans with related allowance | 0 |
Commercial real estate, owner occupied |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance | 2,125 | 1,382
Impaired loans with related allowance | 2,061 | 2,060
Recorded Investment |  |
Impaired loans with no related allowance | 1,310 | 306
Impaired loans with related allowance | 1,323 | 1,324
Related Allowance | 557 | 124
Average Recorded Investment |  |
Impaired loans with no related allowance | 1,429 | 357
Impaired loans with related allowance | 1,447 | 1,324
Interest Income Recognized |  |
Impaired loans with no related allowance | 0 | 0
Impaired loans with related allowance | 0 | 0
Residential |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance | 957 | 93
Impaired loans with related allowance | 2,041 | 2,070
Recorded Investment |  |
Impaired loans with no related allowance | 816 | 76
Impaired loans with related allowance | 2,014 | 2,044
Related Allowance | 352 | 383
Average Recorded Investment |  |
Impaired loans with no related allowance | 840 | 77
Impaired loans with related allowance | 2,108 | 2,083
Interest Income Recognized |  |
Impaired loans with no related allowance | 3 | 3
Impaired loans with related allowance | 70 | 63
Home equity |  |
Unpaid Principal Balance |  |
Impaired loans with related allowance | 487 | 417
Recorded Investment |  |
Impaired loans with related allowance | 461 | 400
Related Allowance | 80 | 75
Average Recorded Investment |  |
Impaired loans with related allowance | 473 | 409
Interest Income Recognized |  |
Impaired loans with related allowance | 14 | 12
Individuals' loans for household and other personal expenditures |  |
Unpaid Principal Balance |  |
Impaired loans with no related allowance | 2 |
Impaired loans with related allowance |  | 4
Recorded Investment |  |
Impaired loans with no related allowance | 2 |
Impaired loans with related allowance |  | 4
Related Allowance |  | 0
Average Recorded Investment |  |
Impaired loans with no related allowance | 3 |
Impaired loans with related allowance |  | 4
Interest Income Recognized |  |
Impaired loans with no related allowance | $ 0 |
Impaired loans with related allowance |  | $ 0

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