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Loans, Credit Quality Indicator (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Financing Receivable by credit exposure [Abstract] |  |  |
Total | $ 217,173 |  | $ 218,428
Minimum [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Percentage of dollar volume of commercial loan portfolio to be reviewed | 50.00% | 60.00% |
Amount over which all new loans to be reviewed | $ 1,000 |  |
Amount over which all relationships to be reviewed | 1,000 |  |
Amount which is 30 days past due to be reviewed for all aggregate loan relationships | 750 |  |
Real Estate Loans [Member] | Commercial [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 273,624 |  | 252,577
Real Estate Loans [Member] | Agricultural [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 207,052 |  | 123,624
Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 17,074 |  | 25,441
Real Estate Loans [Member] | Mortgages [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 149,073 |  | 148,730
Real Estate Loans [Member] | Home Equity [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 57,316 |  | 58,693
Consumer [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 10,784 |  | 11,005
Other Commercial Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 56,222 |  | 58,639
Other Agricultural Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 34,066 |  | 23,388
State and Political Subdivision Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 101,951 |  | 97,514
Pass [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 630,331 |  | 516,605
Pass [Member] | Real Estate Loans [Member] | Commercial [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 246,405 |  | 225,185
Pass [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 195,469 |  | 110,785
Pass [Member] | Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 17,074 |  | 25,441
Pass [Member] | Other Commercial Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 51,341 |  | 51,396
Pass [Member] | Other Agricultural Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 31,791 |  | 20,178
Pass [Member] | State and Political Subdivision Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 88,251 |  | 83,620
Special Mention [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 23,617 |  | 39,124
Special Mention [Member] | Real Estate Loans [Member] | Commercial [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 15,069 |  | 14,045
Special Mention [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 4,824 |  | 8,231
Special Mention [Member] | Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Special Mention [Member] | Other Commercial Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 635 |  | 2,049
Special Mention [Member] | Other Agricultural Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 198 |  | 1,733
Special Mention [Member] | State and Political Subdivision Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 2,891 |  | 13,066
Substandard [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 35,960 |  | 25,365
Substandard [Member] | Real Estate Loans [Member] | Commercial [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 12,150 |  | 13,347
Substandard [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 6,759 |  | 4,608
Substandard [Member] | Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Substandard [Member] | Other Commercial Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 4,165 |  | 5,105
Substandard [Member] | Other Agricultural Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 2,077 |  | 1,477
Substandard [Member] | State and Political Subdivision Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 10,809 |  | 828
Doubtful [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 81 |  | 89
Doubtful [Member] | Real Estate Loans [Member] | Commercial [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Doubtful [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Doubtful [Member] | Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Doubtful [Member] | Other Commercial Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 81 |  | 89
Doubtful [Member] | Other Agricultural Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Doubtful [Member] | State and Political Subdivision Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] | Real Estate Loans [Member] | Commercial [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] | Real Estate Loans [Member] | Construction [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] | Other Commercial Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] | Other Agricultural Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Loss [Member] | State and Political Subdivision Loans [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
Internally Assigned Grade [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 689,989 |  | 581,183
Performing [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 215,616 |  | 216,377
Performing [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 147,785 |  | 147,047
Performing [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 57,148 |  | 58,438
Performing [Member] | Consumer [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 10,683 |  | 10,892
Nonperforming [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 1,523 |  | 2,012
Nonperforming [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 1,254 |  | 1,648
Nonperforming [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 168 |  | 255
Nonperforming [Member] | Consumer [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 101 |  | 109
PCI [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 34 |  | 39
PCI [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 34 |  | 35
PCI [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | 0 |  | 0
PCI [Member] | Consumer [Member] |  |  |
Financing Receivable by credit exposure [Abstract] |  |  |
Total | $ 0 |  | $ 4

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