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Loans and Allowance for Loan Losses - Schedule of Past Due Financing Receivables (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 2,913 | 758
Loans, Non-accrual loans | 5,489 | 2,746
Loan, Total past due and non-accrual loans | 8,402 | 3,504
Loan, Total loans not past due | $ 425,652 | $ 422,265
Percent of gross loans, 30-59 days delinquent and accruing | 0.51% | 0.09%
Percent of gross loans, 60-89 days delinquent and accruing | 0.16% | 0.09%
Percent of gross loans, 90 days or more delinquent and accruing | 0.00% | 0.00%
Percentage of gross loans, Total past due loans accruing | 0.67% | 0.18%
Percent of gross loans, Non-accrual loans | 1.26% | 0.64%
Percentage of Total past due and non-accrual loans | 1.94% | 0.82%
Percentage of Total loans not past due | 98.06% | 99.18%
30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | $ 2,219 | $ 215
60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 694 | 396
Commercial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 50 | 18
Loans, Non-accrual loans |  | 342
Loan, Total past due and non-accrual loans | 1,629 | 360
Loan, Total loans not past due | 49,315 | 54,146
Commercial [Member] | 30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 50 |
Commercial [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due |  | 5
Agriculture [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 678 | 55
Loans, Non-accrual loans | 883 | 838
Loan, Total past due and non-accrual loans | 1,561 | 893
Loan, Total loans not past due | 82,540 | 77,431
Agriculture [Member] | 30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 588 |
Agriculture [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 90 |
Municipal [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing |  |
Loans, Non-accrual loans |  |
Loan, Total past due and non-accrual loans |  |
Loan, Total loans not past due | 3,479 | 3,884
Municipal [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Municipal [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Consumer Loan [Member] | 30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 122 | 79
Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 127 | 82
Loans, Non-accrual loans | 44 | 72
Loan, Total past due and non-accrual loans | 171 | 154
Loan, Total loans not past due | 21,814 | 20,117
Consumer [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 5 | 3
One-To-Four Family Residential Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 1,416 | 603
Loans, Non-accrual loans | 333 | 595
Loan, Total past due and non-accrual loans | 1,749 | 1,198
Loan, Total loans not past due | 135,080 | 135,648
One-To-Four Family Residential Real Estate [Member] | 30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 1,163 |
One-To-Four Family Residential Real Estate [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 253 | 388
Construction and Land [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 432 |
Loans, Non-accrual loans | 786 | 599
Loan, Total past due and non-accrual loans | 1,218 | 599
Loan, Total loans not past due | 14,680 | 13,139
Construction and Land [Member] | 30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 86 |
Construction and Land [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 346 |
Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 210 |
Loans, Non-accrual loans | 1,864 | 300
Loan, Total past due and non-accrual loans | 2,074 | 300
Loan, Total loans not past due | 118,744 | 117,900
Commercial Real Estate [Member] | 30-59Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due | 210 |
Commercial Real Estate [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Recorded Investment, Past Due |  |

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