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Loans and Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | $ 409,073 | $ 398,785 | $ 369,000
Nonaccrual past due loans | 1,532 | 1,096 |
Agricultural [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 49,109 | 48,464 | 44,614
Nonaccrual past due loans | 393 | 423 |
Agricultural [Member] | Risk ratings 1 and 2 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 15,300 | 14,813 |
Agricultural [Member] | Risk rating 3 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 23,938 | 22,721 |
Agricultural [Member] | Risk rating 4 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 9,082 | 10,199 |
Agricultural [Member] | Risk rating 5 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 211 | 308 |
Agricultural [Member] | Risk rating 6 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 578 | 423 |
Commercial and Industrial [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 91,406 | 104,386 | 96,088
Commercial and Industrial [Member] | Risk ratings 1 and 2 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 11,972 | 13,491 |
Commercial and Industrial [Member] | Risk rating 3 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 50,266 | 63,366 |
Commercial and Industrial [Member] | Risk rating 4 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 23,961 | 26,943 |
Commercial and Industrial [Member] | Risk rating 5 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 5,204 | 491 |
Commercial and Industrial [Member] | Risk rating 6 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 3 | 95 |
Commercial Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 139,453 | 123,487 | 110,762
Nonaccrual past due loans | 123 | 222 |
Commercial Real Estate [Member] | Risk ratings 1 and 2 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 7,962 | 8,227 |
Commercial Real Estate [Member] | Risk rating 3 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 89,173 | 78,868 |
Commercial Real Estate [Member] | Risk rating 4 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 36,193 | 33,429 |
Commercial Real Estate [Member] | Risk rating 5 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 4,850 | 1,533 |
Commercial Real Estate [Member] | Risk rating 6 [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 1,275 | 1,430 |
Consumer [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 24,382 | 24,513 | 21,596
Nonaccrual past due loans | 62 | 15 |
Consumer [Member] | Performing [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 24,320 | 24,497 |
Consumer [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans |  | 1 |
Construction Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 8,843 | 6,613 | 6,153
Construction Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 8,843 | 6,613 |
Residential Real Estate [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | 95,880 | 91,322 | $ 89,787
Nonaccrual past due loans | 955 | 436 |
Residential Real Estate [Member] | Performing [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans | $ 94,925 | 90,629 |
Residential Real Estate [Member] | Nonperforming [Member] |  |  |
Financing Receivable, Recorded Investment [Line Items] |  |  |
Risk rated loans |  | $ 257 |

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