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Loans, Credit Quality Indicator (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Financing Receivable by credit exposure [Abstract] |  |
Total | $ 216,318,000 | $ 214,950,000
Minimum [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Percentage of dollar volume of commercial loan portfolio to be reviewed | 55.00% |
Amount over which all new loans to be reviewed | $ 1,000,000 |
Amount over which all relationships to be reviewed | 1,000,000 |
Amount which is 30 days past due to be reviewed for all aggregate loan relationships | 750,000 |
Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 251,149,000 | 237,542,000
Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 88,555,000 | 57,822,000
Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 18,774,000 | 15,011,000
Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 146,130,000 | 141,039,000
Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 58,962,000 | 62,368,000
Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 11,226,000 | 11,543,000
Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 57,062,000 | 57,549,000
Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 21,196,000 | 13,657,000
State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 98,239,000 | 98,500,000
Pass [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 468,900,000 | 448,776,000
Pass [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 221,715,000 | 217,544,000
Pass [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 76,500,000 | 53,695,000
Pass [Member] | Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 18,774,000 | 14,422,000
Pass [Member] | Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 49,987,000 | 51,297,000
Pass [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 17,383,000 | 13,318,000
Pass [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 84,541,000 | 98,500,000
Special Mention [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 40,916,000 | 8,284,000
Special Mention [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 13,935,000 | 4,150,000
Special Mention [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 8,969,000 | 2,865,000
Special Mention [Member] | Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 0 | 589,000
Special Mention [Member] | Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,964,000 | 446,000
Special Mention [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 2,350,000 | 234,000
Special Mention [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 13,698,000 | 0
Substandard [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 25,000,000 | 22,852,000
Substandard [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 15,471,000 | 15,816,000
Substandard [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 3,086,000 | 1,262,000
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 | 4,980,000 | 5,669,000
Substandard [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,463,000 | 105,000
Substandard [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 0 | 0
Doubtful [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 159,000 | 169,000
Doubtful [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 28,000 | 32,000
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 | 131,000 | 137,000
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 | 534,975,000 | 480,081,000
Performing [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 214,240,000 | 213,440,000
Performing [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 144,249,000 | 139,734,000
Performing [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 58,845,000 | 62,236,000
Performing [Member] | Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 11,146,000 | 11,470,000
Nonperforming [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 2,039,000 | 1,466,000
Nonperforming [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,846,000 | 1,270,000
Nonperforming [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 117,000 | 132,000
Nonperforming [Member] | Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 76,000 | 64,000
PCI [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 39,000 | 44,000
PCI [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 35,000 | 35,000
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 | $ 4,000 | $ 9,000

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