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Loans and Allowance for Loan Losses - Schedule of Impaired Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Unpaid contractual principal	$ 12,823	$ 10,800
Impaired loan balance	10,598	8,680
Impaired loans without an allowance	8,870	6,524
Impaired loans with an allowance	1,728	2,156
Related allowance recorded	543	733
Year-to-date average loan balance	10,689	9,104
Year-to-date interest income recognized	141	584
One-to-Four Family Residential Real Estate Loans [Member]
Unpaid contractual principal	1,477	1,297
Impaired loan balance	1,436	1,256
Impaired loans without an allowance	1,067	887
Impaired loans with an allowance	369	369
Related allowance recorded	129	129
Year-to-date average loan balance	1,442	1,291
Year-to-date interest income recognized	2	10
Construction and Land Loan [Member]
Unpaid contractual principal	3,154	3,214
Impaired loan balance	1,319	1,479
Impaired loans without an allowance	1,228	1,288
Impaired loans with an allowance	91	191
Related allowance recorded	91	191
Year-to-date average loan balance	1,353	1,631
Year-to-date interest income recognized	7	36
Commercial Real Estate Loans [Member]
Unpaid contractual principal	5,504	3,461
Impaired loan balance	5,504	3,461
Impaired loans without an allowance	5,308	3,258
Impaired loans with an allowance	196	203
Related allowance recorded	52	103
Year-to-date average loan balance	5,510	3,489
Year-to-date interest income recognized	118	478
Commercial Loans [Member]
Unpaid contractual principal	1,710	1,427
Impaired loan balance	1,576	1,298
Impaired loans without an allowance	680	416
Impaired loans with an allowance	896	882
Related allowance recorded	235	204
Year-to-date average loan balance	1,578	1,464
Year-to-date interest income recognized	1	11
Agriculture Loans [Member]
Unpaid contractual principal	905	1,339
Impaired loan balance	690	1,124
Impaired loans without an allowance	514	613
Impaired loans with an allowance	176	511
Related allowance recorded	36	106
Year-to-date average loan balance	733	1,166
Year-to-date interest income recognized	13	48
Municipal Loans [Member]
Unpaid contractual principal	58	58
Impaired loan balance	58	58
Impaired loans without an allowance	58	58
Impaired loans with an allowance
Related allowance recorded
Year-to-date average loan balance	58	58
Year-to-date interest income recognized		1
Consumer Loans [Member]
Unpaid contractual principal	15	4
Impaired loan balance	15	4
Impaired loans without an allowance	15	4
Impaired loans with an allowance
Related allowance recorded
Year-to-date average loan balance	15	5
Year-to-date interest income recognized

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
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