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LOANS AND RELATED ALLOWANCE FOR LOAN LOSSES, Impaired Financing Receivable (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | $ 28,887 | $ 20,127 |
Recorded Investment With No Allowance | 21,756 | 15,031 |
Recorded Investment With Allowance | 2,642 | 2,662 |
Total Recorded Investment | 24,398 | 17,693 |
Related Allowance | 410 | 487 |
Average Recorded Investment | 22,392 | 12,874 | $ 8,804
Interest Income Recognized | 750 | 201 | 180
Interest Income Recognized Cash Basis | 59 | 7 | 11
Real Estate Loans [Member] | Mortgages [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 1,055 | 953 |
Recorded Investment With No Allowance | 273 | 570 |
Recorded Investment With Allowance | 700 | 330 |
Total Recorded Investment | 973 | 900 |
Related Allowance | 47 | 22 |
Average Recorded Investment | 900 | 590 | 240
Interest Income Recognized | 13 | 13 | 12
Interest Income Recognized Cash Basis | 0 | 0 | 0
Real Estate Loans [Member] | Home Equity [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 92 | 57 |
Recorded Investment With No Allowance | 40 | 0 |
Recorded Investment With Allowance | 52 | 57 |
Total Recorded Investment | 92 | 57 |
Related Allowance | 9 | 10 |
Average Recorded Investment | 67 | 59 | 88
Interest Income Recognized | 4 | 4 | 4
Interest Income Recognized Cash Basis | 0 | 0 | 0
Real Estate Loans [Member] | Commercial [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 16,363 | 7,958 |
Recorded Investment With No Allowance | 13,154 | 5,697 |
Recorded Investment With Allowance | 710 | 45 |
Total Recorded Investment | 13,864 | 5,742 |
Related Allowance | 94 | 45 |
Average Recorded Investment | 11,567 | 5,959 | 5,683
Interest Income Recognized | 385 | 69 | 63
Interest Income Recognized Cash Basis | 7 | 1 | 5
Real Estate Loans [Member] | Agricultural [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 5,231 | 3,347 |
Recorded Investment With No Allowance | 3,283 | 2,000 |
Recorded Investment With Allowance | 618 | 1,347 |
Total Recorded Investment | 3,901 | 3,347 |
Related Allowance | 3 | 54 |
Average Recorded Investment | 3,574 | 361 | 56
Interest Income Recognized | 131 | 17 | 2
Interest Income Recognized Cash Basis | 0 | 0 | 0
Consumer [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 10 |  |
Recorded Investment With No Allowance | 2 |  |
Recorded Investment With Allowance | 6 |  |
Total Recorded Investment | 8 |  |
Related Allowance | 0 |  |
Average Recorded Investment | 3 | 0 | 0
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 | 4,739 | 6,159 |
Recorded Investment With No Allowance | 3,766 | 5,135 |
Recorded Investment With Allowance | 431 | 859 |
Total Recorded Investment | 4,197 | 5,994 |
Related Allowance | 231 | 326 |
Average Recorded Investment | 4,790 | 5,715 | 2,700
Interest Income Recognized | 152 | 87 | 98
Interest Income Recognized Cash Basis | 52 | 6 | 6
Other Agricultural Loans [Member] |  |  |
Impaired Financing Receivable [Abstract] |  |  |
Unpaid Principal Balance | 1,397 | 1,653 |
Recorded Investment With No Allowance | 1,238 | 1,629 |
Recorded Investment With Allowance | 125 | 24 |
Total Recorded Investment | 1,363 | 1,653 |
Related Allowance | 26 | 30 |
Average Recorded Investment | 1,491 | 190 | 37
Interest Income Recognized | 65 | 11 | 1
Interest Income Recognized Cash Basis | $ 0 | $ 0 | $ 0

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