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Loans, Credit Quality Indicator (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Financing Receivable by credit exposure [Abstract] |  |
Total | $ 210,855,000 | $ 232,188,000
Minimum [Member] |  |
Financing Receivable [Abstract] |  |
Amount over which all relationships to be reviewed, minimum | $ 500,000 |
Percentage of dollar volume of commercial loan portfolio to be reviewed | 50.00% |
Amount over which all new loans to be reviewed | $ 1,000,000.0 |
Amount over which all relationships to be reviewed | 1,000,000.0 |
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 | 641,633,000 | 596,255,000
Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 310,274,000 | 315,158,000
Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 63,065,000 | 35,404,000
Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 149,747,000 | 146,902,000
Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 52,424,000 | 55,009,000
Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 8,684,000 | 30,277,000
Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 104,349,000 | 114,169,000
Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 33,720,000 | 48,779,000
State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 51,213,000 | 63,328,000
Pass [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,139,917,000 | 1,098,752,000
Pass [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 610,776,000 | 563,121,000
Pass [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 290,149,000 | 289,216,000
Pass [Member] | Real Estate Loans [Member] | Construction [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 63,065,000 | 35,404,000
Pass [Member] | Other Commercial Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 97,731,000 | 106,604,000
Pass [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 31,594,000 | 45,758,000
Pass [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 46,602,000 | 58,649,000
Special Mention [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 42,549,000 | 48,247,000
Special Mention [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 24,148,000 | 24,329,000
Special Mention [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 10,068,000 | 14,307,000
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 | 3,038,000 | 3,808,000
Special Mention [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 923,000 | 1,431,000
Special Mention [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 4,372,000 | 4,372,000
Substandard [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 21,736,000 | 26,009,000
Substandard [Member] | Real Estate Loans [Member] | Commercial [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 6,709,000 | 8,805,000
Substandard [Member] | Real Estate Loans [Member] | Agricultural [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 10,057,000 | 11,635,000
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 | 3,528,000 | 3,672,000
Substandard [Member] | Other Agricultural Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 1,203,000 | 1,590,000
Substandard [Member] | State and Political Subdivision Loans [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 239,000 | 307,000
Doubtful [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 52,000 | 85,000
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 | 52,000 | 85,000
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 | 1,204,254,000 | 1,173,093,000
Performing [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 210,236,000 | 231,051,000
Performing [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 149,149,000 | 145,843,000
Performing [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 52,403,000 | 54,961,000
Performing [Member] | Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 8,684,000 | 30,247,000
Nonperforming [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 600,000 | 1,117,000
Nonperforming [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 579,000 | 1,039,000
Nonperforming [Member] | Real Estate Loans [Member] | Home Equity [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 21,000 | 48,000
Nonperforming [Member] | Consumer [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 0 | 30,000
PCI [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 19,000 | 20,000
PCI [Member] | Real Estate Loans [Member] | Mortgages [Member] |  |
Financing Receivable by credit exposure [Abstract] |  |
Total | 19,000 | 20,000
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 | $ 0 | $ 0

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