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Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructurings on Financing Receivables (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) Number | Dec. 31, 2017 USD ($) Number
One-to-Four Family Residential Real Estate Loans [Member] |  |
Troubled debt restructurings, Number of loans | Number | 2 | 2
Financing receivable, modifications, recorded investment, non accrual balance |  |
Financing receivable, modifications, recorded investment, accruing balance | $ 181 | $ 195
Construction and Land Loan [Member] |  |
Troubled debt restructurings, Number of loans | Number | 4 | 4
Financing receivable, modifications, recorded investment, non accrual balance | $ 523 | $ 575
Financing receivable, modifications, recorded investment, accruing balance | $ 860 | $ 1,252
Commercial Real Estate Loans [Member] |  |
Troubled debt restructurings, Number of loans | Number | 2 | 3
Financing receivable, modifications, recorded investment, non accrual balance |  | $ 45
Financing receivable, modifications, recorded investment, accruing balance | $ 2,121 | $ 2,132
Commercial Loans [Member] |  |
Troubled debt restructurings, Number of loans | Number | 1 |
Financing receivable, modifications, recorded investment, non accrual balance | $ 36 |
Financing receivable, modifications, recorded investment, accruing balance |  |
Agriculture Loans [Member] |  |
Troubled debt restructurings, Number of loans | Number | 4 |
Municipal Loans [Member] |  |
Troubled debt restructurings, Number of loans | Number | 1 | 2
Financing receivable, modifications, recorded investment, non accrual balance |  |
Financing receivable, modifications, recorded investment, accruing balance | $ 58 | $ 140
TDR [Member] |  |
Troubled debt restructurings, Number of loans | Number | 14 | 20
Financing receivable, modifications, recorded investment, non accrual balance | $ 582 | $ 1,091
Financing receivable, modifications, recorded investment, accruing balance | 3,455 | $ 3,719
Agriculture Loans [Member] |  |
Troubled debt restructurings, Number of loans | Number |  | 9
Financing receivable, modifications, recorded investment, non accrual balance | 23 | $ 471
Financing receivable, modifications, recorded investment, accruing balance | $ 235 |

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- Definition The amount of the outstanding recorded investment related to accruing balance of financing receivables that have been modified by troubled debt restructurings. + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524 + Details
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