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Loans, Impaired Financing Receivable (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | $ 17,510 |  | $ 17,510 |  | $ 19,050
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 11,649 |  | 11,649 |  | 13,047
Recorded Investment With Allowance | 3,683 |  | 3,683 |  | 4,230
Total Recorded Investment | 15,332 |  | 15,332 |  | 17,277
Related Allowance | 213 |  | 213 |  | 510
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 15,347 | $ 16,997 | 16,194 | $ 18,729 |
Interest Income Recognized | 104 | 102 | 296 | 380 |
Interest Income Recognized Cash Basis | 8 | 18 | 23 | 20 |
Real Estate Loans [Member] | Mortgages [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 757 |  | 757 |  | 1,070
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 561 |  | 561 |  | 740
Recorded Investment With Allowance | 46 |  | 46 |  | 123
Total Recorded Investment | 607 |  | 607 |  | 863
Related Allowance | 7 |  | 7 |  | 9
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 613 | 900 | 727 | 998 |
Interest Income Recognized | 4 | 5 | 12 | 15 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Real Estate Loans [Member] | Home Equity [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 100 |  | 100 |  | 150
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 38 |  | 38 |  | 70
Recorded Investment With Allowance | 45 |  | 45 |  | 57
Total Recorded Investment | 83 |  | 83 |  | 127
Related Allowance | 7 |  | 7 |  | 9
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 84 | 138 | 106 | 142 |
Interest Income Recognized | 1 | 2 | 4 | 5 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Real Estate Loans [Member] | Commercial [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 9,650 |  | 9,650 |  | 9,847
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 7,937 |  | 7,937 |  | 8,323
Recorded Investment With Allowance | 824 |  | 824 |  | 860
Total Recorded Investment | 8,761 |  | 8,761 |  | 9,183
Related Allowance | 85 |  | 85 |  | 95
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 8,688 | 9,436 | 8,902 | 10,836 |
Interest Income Recognized | 77 | 75 | 211 | 294 |
Interest Income Recognized Cash Basis | 8 | 18 | 23 | 20 |
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 4,708 |  | 4,708 |  | 4,811
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 2,734 |  | 2,734 |  | 2,799
Recorded Investment With Allowance | 1,694 |  | 1,694 |  | 1,846
Total Recorded Investment | 4,428 |  | 4,428 |  | 4,645
Related Allowance | 17 |  | 17 |  | 83
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 4,454 | 3,633 | 4,513 | 3,718 |
Interest Income Recognized | 21 | 18 | 64 | 58 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance |  |  |  |  | 0
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance |  |  |  |  | 0
Recorded Investment With Allowance |  |  |  |  | 0
Total Recorded Investment |  |  |  |  | 0
Related Allowance |  |  |  |  | 0
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 0 | 0 |  |  |
Interest Income Recognized | 0 | 0 |  |  |
Interest Income Recognized Cash Basis | 0 | 0 |  |  |
Consumer [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance |  |  |  |  | 2
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance |  |  |  |  | 2
Recorded Investment With Allowance |  |  |  |  | 0
Total Recorded Investment |  |  |  |  | 2
Related Allowance |  |  |  |  | 0
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 0 | 5 | 1 | 3 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Other Commercial Loans [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 1,088 |  | 1,088 |  | 1,908
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 366 |  | 366 |  | 1,094
Recorded Investment With Allowance | 96 |  | 96 |  | 241
Total Recorded Investment | 462 |  | 462 |  | 1,335
Related Allowance | 34 |  | 34 |  | 170
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 486 | 1,626 | 876 | 1,757 |
Interest Income Recognized | 1 | 0 | 2 | 2 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Other Agricultural Loans [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 1,207 |  | 1,207 |  | 1,262
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 13 |  | 13 |  | 19
Recorded Investment With Allowance | 978 |  | 978 |  | 1,103
Total Recorded Investment | 991 |  | 991 |  | 1,122
Related Allowance | 63 |  | 63 |  | $ 144
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 1,022 | 1,259 | 1,069 | 1,275 |
Interest Income Recognized | 0 | 2 | 3 | 6 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | $ 0 |
State and Political Subdivision Loans [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 0 |  | 0 |  |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |  |  |
Recorded Investment With No Allowance | 0 |  | 0 |  |
Recorded Investment With Allowance | 0 |  | 0 |  |
Total Recorded Investment | 0 |  | 0 |  |
Related Allowance | 0 |  | $ 0 |  |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |  |  |
Average Recorded Investment | 0 | 0 |  |  |
Interest Income Recognized | 0 | 0 |  |  |
Interest Income Recognized Cash Basis | $ 0 | $ 0 |  |  |

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