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Loans and Allowance for Loan Losses - Schedule of Past Due Financing Receivables (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 1,530 | 1,355
Loans, Non-accrual loans | 5,285 | 6,041
Loan, Total past due and non-accrual loans | 6,815 | 7,396
Loan, Total loans not past due | $ 460,322 | $ 431,840
Percent of gross loans, 30-59 days delinquent and accruing | 0.07% | 0.05%
Percent of gross loans, 60-89 days delinquent and accruing | 0.26% | 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 | 0.33% | 0.31%
Percent of gross loans, Non-accrual loans | 1.13% | 1.37%
Percentage of Total past due and non-accrual loans | 1.46% | 1.68%
Percentage of Total loans not past due | 98.54% | 98.32%
Commercial Loan [Member] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 759 | 397
Loans, Non-accrual loans | 2,032 | 2,002
Loan, Total past due and non-accrual loans | 2,791 | 2,399
Loan, Total loans not past due | 63,740 | 52,192
Agriculture Loan [Member] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 303 |
Loans, Non-accrual loans | 384 | 833
Loan, Total past due and non-accrual loans | 687 | 833
Loan, Total loans not past due | 87,214 | 82,175
Municipal Loan [Member] |  |
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 | 3,172 | 3,396
Consumer Loan [Member] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 79 | 309
Loans, Non-accrual loans | 46 | 34
Loan, Total past due and non-accrual loans | 125 | 343
Loan, Total loans not past due | 22,742 | 21,703
30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 311 | 228
30-59 Days Delinquent and Accruing [Member] | Commercial Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 48 |
30-59 Days Delinquent and Accruing [Member] | Agriculture Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 127 |
30-59 Days Delinquent and Accruing [Member] | Municipal Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
30-59 Days Delinquent and Accruing [Member] | Consumer Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 36 | 105
60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 1,219 | 1,127
60-89 Days Delinquent and Accruing [Member] | Commercial Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 711 | 397
60-89 Days Delinquent and Accruing [Member] | Agriculture Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 176 |
60-89 Days Delinquent and Accruing [Member] | Municipal Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
60-89 Days Delinquent and Accruing [Member] | Consumer Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 43 | 204
One-To-Four Family Residential Real Estate Loan [Member] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing | 389 | 414
Loans, Non-accrual loans | 463 | 552
Loan, Total past due and non-accrual loans | 852 | 966
Loan, Total loans not past due | 137,415 | 135,249
One-To-Four Family Residential Real Estate Loan [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 100 | 101
One-To-Four Family Residential Real Estate Loan [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due | 289 | 313
Construction and Land Loan [Member] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing |  | 4
Loans, Non-accrual loans | 567 | 779
Loan, Total past due and non-accrual loans | 567 | 783
Loan, Total loans not past due | 25,886 | 18,573
Construction and Land Loan [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  |
Construction and Land Loan [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  | 4
Commercial Real Estate Loan [Member] |  |
Loans, 90 days or more delinquent and accruing |  |
Loans, Total past due loans accruing |  | 231
Loans, Non-accrual loans | 1,793 | 1,841
Loan, Total past due and non-accrual loans | 1,793 | 2,072
Loan, Total loans not past due | 120,153 | 118,552
Commercial Real Estate Loan [Member] | 30-59 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  | 22
Commercial Real Estate Loan [Member] | 60-89 Days Delinquent and Accruing [Member] |  |
Financing Receivable, Recorded Investment, Past Due |  | $ 209

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