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Loans and Allowance for Loan Losses - Schedule of Troubled Debt Restructurings on Financing Receivables (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) Number	Dec. 31, 2019 USD ($) 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	$ 165	$ 168
Construction and Land Loan [Member]
Troubled debt restructurings, Number of loans | Number	4	4
Financing receivable, modifications, recorded investment, non accrual balance	$ 508	$ 510
Financing receivable, modifications, recorded investment, accruing balance	$ 523	$ 581
Commercial Real Estate Loans [Member]
Troubled debt restructurings, Number of loans | Number	1	1
Financing receivable, modifications, recorded investment, non accrual balance
Financing receivable, modifications, recorded investment, accruing balance	$ 2,021	$ 2,021
Commercial Loans [Member]
Troubled debt restructurings, Number of loans | Number	1	1
Financing receivable, modifications, recorded investment, non accrual balance
Financing receivable, modifications, recorded investment, accruing balance	$ 28	$ 28
Agriculture Loans [Member]
Troubled debt restructurings, Number of loans | Number	4	4
Financing receivable, modifications, recorded investment, non accrual balance
Financing receivable, modifications, recorded investment, accruing balance	$ 243	$ 278
Municipal Loans [Member]
Troubled debt restructurings, Number of loans | Number	1	1
Financing receivable, modifications, recorded investment, non accrual balance
Financing receivable, modifications, recorded investment, accruing balance	$ 58	$ 58
Troubled Debt Restructurings [Member]
Troubled debt restructurings, Number of loans | Number	13	13
Financing receivable, modifications, recorded investment, non accrual balance	$ 508	$ 510
Financing receivable, modifications, recorded investment, accruing balance	$ 3,038	$ 3,134

X

- 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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X

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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X

- Definition

Amount of financing receivable on nonaccrual status.

+ 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=121611835&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447

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