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Loans, Impaired Financing Receivable (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | $ 29,038 |  | $ 29,038 |  | $ 28,887
Recorded Investment With No Allowance | 21,212 |  | 21,212 |  | 21,756
Recorded Investment With Allowance | 4,319 |  | 4,319 |  | 2,642
Total Recorded Investment | 25,531 |  | 25,531 |  | 24,398
Related Allowance | 405 |  | 405 |  | 410
Average Recorded Investment | 24,567 | $ 24,214 | 24,554 | $ 20,784 |
Interest Income Recognized | 208 | 229 | 422 | 351 |
Interest Income Recognized Cash Basis | 3 | 17 | 8 | 30 |
Real Estate Loans [Member] | Mortgages [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 1,138 |  | 1,138 |  | 1,055
Recorded Investment With No Allowance | 261 |  | 261 |  | 273
Recorded Investment With Allowance | 776 |  | 776 |  | 700
Total Recorded Investment | 1,037 |  | 1,037 |  | 973
Related Allowance | 15 |  | 15 |  | 47
Average Recorded Investment | 1,045 | 986 | 1,034 | 940 |
Interest Income Recognized | 3 | 3 | 7 | 6 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Real Estate Loans [Member] | Home Equity [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 111 |  | 111 |  | 92
Recorded Investment With No Allowance | 14 |  | 14 |  | 40
Recorded Investment With Allowance | 80 |  | 80 |  | 52
Total Recorded Investment | 94 |  | 94 |  | 92
Related Allowance | 15 |  | 15 |  | 9
Average Recorded Investment | 95 | 60 | 101 | 58 |
Interest Income Recognized | 1 | 1 | 2 | 2 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Real Estate Loans [Member] | Commercial [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 16,576 |  | 16,576 |  | 16,363
Recorded Investment With No Allowance | 12,442 |  | 12,442 |  | 13,154
Recorded Investment With Allowance | 1,349 |  | 1,349 |  | 710
Total Recorded Investment | 13,791 |  | 13,791 |  | 13,864
Related Allowance | 159 |  | 159 |  | 94
Average Recorded Investment | 13,833 | 12,980 | 13,814 | 9,387 |
Interest Income Recognized | 120 | 134 | 242 | 158 |
Interest Income Recognized Cash Basis | 3 | 0 | 8 | 3 |
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 5,210 |  | 5,210 |  | 5,231
Recorded Investment With No Allowance | 3,648 |  | 3,648 |  | 3,283
Recorded Investment With Allowance | 1,556 |  | 1,556 |  | 618
Total Recorded Investment | 5,204 |  | 5,204 |  | 3,901
Related Allowance | 25 |  | 25 |  | 3
Average Recorded Investment | 4,185 | 3,641 | 4,135 | 3,513 |
Interest Income Recognized | 49 | 32 | 100 | 63 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 0 |  | 0 |  | 0
Recorded Investment With No Allowance | 0 |  | 0 |  | 0
Recorded Investment With Allowance | 0 |  | 0 |  | 0
Total Recorded Investment | 0 |  | 0 |  | 0
Related Allowance | 0 |  | 0 |  | 0
Average Recorded Investment | 0 | 0 | 0 | 0 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
Consumer [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 0 |  | 0 |  | 10
Recorded Investment With No Allowance | 0 |  | 0 |  | 2
Recorded Investment With Allowance | 0 |  | 0 |  | 6
Total Recorded Investment | 0 |  | 0 |  | 8
Related Allowance | 0 |  | 0 |  | 0
Average Recorded Investment | 0 | 3 | 2 | 2 |
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 | 4,489 |  | 4,489 |  | 4,739
Recorded Investment With No Allowance | 3,552 |  | 3,552 |  | 3,766
Recorded Investment With Allowance | 382 |  | 382 |  | 431
Total Recorded Investment | 3,934 |  | 3,934 |  | 4,197
Related Allowance | 151 |  | 151 |  | 231
Average Recorded Investment | 4,067 | 5,029 | 4,112 | 5,313 |
Interest Income Recognized | 26 | 37 | 52 | 77 |
Interest Income Recognized Cash Basis | 0 | 17 | 0 | 27 |
Other Agricultural Loans [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 1,514 |  | 1,514 |  | 1,397
Recorded Investment With No Allowance | 1,295 |  | 1,295 |  | 1,238
Recorded Investment With Allowance | 176 |  | 176 |  | 125
Total Recorded Investment | 1,471 |  | 1,471 |  | 1,363
Related Allowance | 40 |  | 40 |  | 26
Average Recorded Investment | 1,342 | 1,515 | 1,356 | 1,571 |
Interest Income Recognized | 9 | 22 | 19 | 45 |
Interest Income Recognized Cash Basis | 0 | 0 | 0 | 0 |
State and Political Subdivision Loans [Member] |  |  |  |  |
Impaired Financing Receivable [Abstract] |  |  |  |  |
Unpaid Principal Balance | 0 |  | 0 |  | 0
Recorded Investment With No Allowance | 0 |  | 0 |  | 0
Recorded Investment With Allowance | 0 |  | 0 |  | 0
Total Recorded Investment | 0 |  | 0 |  | 0
Related Allowance | 0 |  | 0 |  | $ 0
Average Recorded Investment | 0 | 0 | 0 | 0 |
Interest Income Recognized | 0 | 0 | 0 | 0 |
Interest Income Recognized Cash Basis | $ 0 | $ 0 | $ 0 | $ 0 |

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