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Loans, Credit Quality Indicator (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Financing Receivable by credit exposure [Abstract] |  |
Total | $ 214,325 | $ 218,428
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 |
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 | 267,097 | 252,577
Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 156,299 | 123,624
Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 26,118 | 25,441
Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 147,020 | 148,730
Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 56,797 | 58,693
Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 10,508 | 11,005
Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 59,800 | 58,639
Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 24,227 | 23,388
State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 97,441 | 97,514
Pass [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 568,485 | 516,605
Pass [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 240,229 | 225,185
Pass [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 143,715 | 110,785
Pass [Member] | Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 26,118 | 25,441
Pass [Member] | Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 53,657 | 51,396
Pass [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 21,218 | 20,178
Pass [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 83,548 | 83,620
Special Mention [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 38,522 | 39,124
Special Mention [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 14,732 | 14,045
Special Mention [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 7,835 | 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 | 1,560 | 2,049
Special Mention [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,300 | 1,733
Special Mention [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 13,095 | 13,066
Substandard [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 23,890 | 25,365
Substandard [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 12,136 | 13,347
Substandard [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 4,749 | 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 | 4,498 | 5,105
Substandard [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,709 | 1,477
Substandard [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 798 | 828
Doubtful [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 85 | 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 | 85 | 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 | 630,982 | 581,183
Performing [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 212,407 | 216,377
Performing [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 145,446 | 147,047
Performing [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 56,566 | 58,438
Performing [Member] | Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 10,395 | 10,892
Nonperforming [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,882 | 2,012
Nonperforming [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,539 | 1,648
Nonperforming [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 231 | 255
Nonperforming [Member] | Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 112 | 109
PCI [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 36 | 39
PCI [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 35 | 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 | $ 1 | $ 4

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