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LOANS AND RELATED ALLOWANCE FOR LOAN LOSSES, Impaired Financing Receivable (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | $ 19,050 | $ 21,220 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 13,047 | 14,865 |
Recorded Investment With Allowance | 4,230 | 4,807 |
Total Recorded Investment | 17,277 | 19,672 |
Related Allowance | 510 | 735 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 18,278 | 21,294 | $ 24,743
Interest Income Recognized | 468 | 558 | 786
Interest Income Recognized Cash Basis | 27 | 24 | 20
Real Estate Loans [Member] | Mortgages [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 1,070 | 1,212 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 740 | 794 |
Recorded Investment With Allowance | 123 | 223 |
Total Recorded Investment | 863 | 1,017 |
Related Allowance | 9 | 20 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 956 | 1,062 | 944
Interest Income Recognized | 20 | 16 | 13
Interest Income Recognized Cash Basis | 0 | 0 | 0
Real Estate Loans [Member] | Home Equity [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 150 | 170 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 70 | 83 |
Recorded Investment With Allowance | 57 | 66 |
Total Recorded Investment | 127 | 149 |
Related Allowance | 9 | 12 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 139 | 119 | 95
Interest Income Recognized | 6 | 6 | 4
Interest Income Recognized Cash Basis | 0 | 0 | 0
Real Estate Loans [Member] | Commercial [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 9,847 | 12,070 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 8,323 | 10,723 |
Recorded Investment With Allowance | 860 | 814 |
Total Recorded Investment | 9,183 | 11,537 |
Related Allowance | 95 | 251 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 10,354 | 11,756 | 13,907
Interest Income Recognized | 358 | 453 | 506
Interest Income Recognized Cash Basis | 27 | 24 | 20
Real Estate Loans [Member] | Agricultural [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 4,811 | 3,900 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 2,799 | 1,580 |
Recorded Investment With Allowance | 1,846 | 2,202 |
Total Recorded Investment | 4,645 | 3,782 |
Related Allowance | 83 | 151 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 3,918 | 4,899 | 4,736
Interest Income Recognized | 75 | 78 | 151
Interest Income Recognized Cash Basis | 0 | 0 | 0
Real Estate Loans [Member] | Construction [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 |
Consumer [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 2 | 4 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 2 | 4 |
Recorded Investment With Allowance | 0 | 0 |
Total Recorded Investment | 2 | 4 |
Related Allowance | 0 | 0 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 3 | 2 | 1
Interest Income Recognized | 0 | 0 | 0
Interest Income Recognized Cash Basis | 0 | 0 | 0
Other Commercial Loans [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 1,908 | 2,517 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 1,094 | 1,555 |
Recorded Investment With Allowance | 241 | 347 |
Total Recorded Investment | 1,335 | 1,902 |
Related Allowance | 170 | 147 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 1,671 | 2,056 | 3,659
Interest Income Recognized | 3 | 1 | 89
Interest Income Recognized Cash Basis | 0 | 0 | 0
Other Agricultural Loans [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 1,262 | 1,347 |
Impaired Financing Receivable, Recorded Investment [Abstract] |  |  |
Recorded Investment With No Allowance | 19 | 126 |
Recorded Investment With Allowance | 1,103 | 1,155 |
Total Recorded Investment | 1,122 | 1,281 |
Related Allowance | 144 | 154 |
Impaired Financing Receivable, Average Recorded Investment [Abstract] |  |  |
Average Recorded Investment | 1,237 | 1,400 | 1,401
Interest Income Recognized | 6 | 4 | 23
Interest Income Recognized Cash Basis | $ 0 | $ 0 | $ 0

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