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Loans and Allowance for Loan Losses - Schedule of Past Due Financing Receivables (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due | $ 488,340 | $ 431,840
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 1,671 | 1,355
Loans, Non-accrual loans | 5,236 | 6,041
Loan, Total past due and non-accrual loans | 6,907 | 7,396
Loan, Total loans not past due | $ 488,340 | $ 431,840
Percent of gross loans, 30-59 days delinquent and accruing | 0.24% | 0.05%
Percent of gross loans, 60-89 days delinquent and accruing | 0.10% | 0.26%
Percent of gross loans, 90 days or more delinquent and accruing | 0.00% | 0.00%
Percentage of gross loans, Total past due loans accruing | 0.34% | 0.31%
Percent of gross loans, Non-accrual loans | 1.06% | 1.37%
Percentage of Total past due and non-accrual loans | 1.40% | 1.68%
Percentage of Total loans not past due | 98.60% | 98.32%
Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | $ 72,343 | $ 52,192
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 418 | 397
Loans, Non-accrual loans | 1,528 | 2,002
Loan, Total past due and non-accrual loans | 1,946 | 2,399
Loan, Total loans not past due | 72,343 | 52,192
Agriculture Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 95,962 | 82,175
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 188 |
Loans, Non-accrual loans | 482 | 833
Loan, Total past due and non-accrual loans | 670 | 833
Loan, Total loans not past due | 95,962 | 82,175
Municipal Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 2,953 | 3,396
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 | 2,953 | 3,396
Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 25,254 | 21,703
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 39 | 309
Loans, Non-accrual loans | 45 | 34
Loan, Total past due and non-accrual loans | 174 | 343
Loan, Total loans not past due | 25,254 | 21,703
30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 1,200 | 228
Loan, Total loans not past due | 1,200 | 228
30-59 Days Delinquent and Accruing [Member] | Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 398 |
Loan, Total loans not past due | 398 |
30-59 Days Delinquent and Accruing [Member] | Agriculture Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 100 |
Loan, Total loans not past due | 100 |
30-59 Days Delinquent and Accruing [Member] | Municipal Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Loan, Total loans not past due |  |
60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 471 | 1,127
Loan, Total loans not past due | 471 | 1,127
60-89 Days Delinquent and Accruing [Member] | Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 20 |
Loan, Total loans not past due | 20 |
60-89 Days Delinquent and Accruing [Member] | Agriculture Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 88 |
Loan, Total loans not past due | 88 |
60-89 Days Delinquent and Accruing [Member] | Municipal Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Loan, Total loans not past due |  |
60-89 Days Delinquent and Accruing [Member] | Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 23 | 204
Loan, Total loans not past due | 23 | 204
One-to-Four Family Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 136,116 | 135,249
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 337 | 414
Loans, Non-accrual loans | 442 | 552
Loan, Total past due and non-accrual loans | 779 | 966
Loan, Total loans not past due | 136,116 | 135,249
One-to-Four Family Residential Real Estate Loans [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 131 | 101
Loan, Total loans not past due | 131 | 101
One-to-Four Family Residential Real Estate Loans [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 206 | 313
Loan, Total loans not past due | 206 | 313
Construction and Land Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 19,001 | 18,573
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 134 | 4
Loans, Non-accrual loans | 948 | 779
Loan, Total past due and non-accrual loans | 1,082 | 783
Loan, Total loans not past due | 19,001 | 18,573
Construction and Land Loan [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Loan, Total loans not past due |  |
Construction and Land Loan [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 134 | 4
Loan, Total loans not past due | 134 | 4
Commercial Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 136,711 | 118,552
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 465 | 231
Loans, Non-accrual loans | 1,791 | 1,841
Loan, Total past due and non-accrual loans | 2,256 | 2,072
Loan, Total loans not past due | 136,711 | 118,552
Commercial Real Estate Loans [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 465 | 22
Loan, Total loans not past due | 465 | 22
Commercial Real Estate Loans [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  | 209
Loan, Total loans not past due |  | 209
Consumer Loans [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 106 | 105
Loan, Total loans not past due | $ 106 | 105
Commercial Loans [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Loan, Total loans not past due |  |
Commercial Loans [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  | 397
Loan, Total loans not past due |  | 397
Agriculture Loans [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Loan, Total loans not past due |  |
Municipal Loans [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Loan, Total loans not past due |  |

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