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Loans and Allowance for Loan Losses - Schedule of Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Balance	$ 5,765	$ 5,459
Charge-offs	(49)	(33)
Recoveries	22	18
Provision for loan losses	200	200
Balance	5,938	5,644
Individually evaluated for loss			$ 455	$ 310
Collectively evaluated for loss			5,483	5,455
Total	5,938	5,459	5,938	5,765
Individually evaluated for loss			9,985	8,691
Collectively evaluated for loss			486,510	486,556
Loans and Leases Receivable, Gross, Total			496,495	495,247
One-to-Four Family Residential Real Estate Loans [Member]
Balance	449	542
Charge-offs
Recoveries	1	1
Provision for loan losses	24	(66)
Balance	474	477
Individually evaluated for loss			115	100
Collectively evaluated for loss			359	349
Total	449	542	474	449
Individually evaluated for loss			958	623
Collectively evaluated for loss			134,913	136,272
Loans and Leases Receivable, Gross, Total			135,871	136,895
Construction and Land Loan [Member]
Balance	168	181
Charge-offs
Recoveries
Provision for loan losses	(12)	(60)
Balance	156	121
Individually evaluated for loss			97	103
Collectively evaluated for loss			59	65
Total	168	181	156	168
Individually evaluated for loss			1,766	1,808
Collectively evaluated for loss			16,620	18,275
Loans and Leases Receivable, Gross, Total			18,386	20,083
Commercial Real Estate Loans [Member]
Balance	1,686	1,540
Charge-offs
Recoveries		1
Provision for loan losses	185	21
Balance	1,871	1,562
Individually evaluated for loss			223	67
Collectively evaluated for loss			1,648	1,619
Total	1,686	1,540	1,871	1,686
Individually evaluated for loss			3,986	3,912
Collectively evaluated for loss			137,162	135,055
Loans and Leases Receivable, Gross, Total			141,148	138,967
Commercial Loans [Member]
Balance	1,051	1,226
Charge-offs
Recoveries	1	1
Provision for loan losses	113	257
Balance	1,165	1,484
Individually evaluated for loss			20	27
Collectively evaluated for loss			1,145	1,024
Total	1,051	1,226	1,165	1,051
Individually evaluated for loss			1,567	1,528
Collectively evaluated for loss			77,536	72,761
Loans and Leases Receivable, Gross, Total			79,103	74,289
Agriculture Loans [Member]
Balance	2,238	1,812
Charge-offs
Recoveries
Provision for loan losses	(110)	55
Balance	2,128	1,867
Individually evaluated for loss				13
Collectively evaluated for loss			2,128	2,225
Total	2,238	1,812	2,128	2,238
Individually evaluated for loss			1,609	717
Collectively evaluated for loss			93,296	95,915
Loans and Leases Receivable, Gross, Total			94,905	96,632
Municipal Loans [Member]
Balance	7	8
Charge-offs
Recoveries	6	2
Provision for loan losses	(6)	(3)
Balance	7	7
Individually evaluated for loss
Collectively evaluated for loss			7	7
Total	7	8	7	7
Individually evaluated for loss			58	58
Collectively evaluated for loss			2,864	2,895
Loans and Leases Receivable, Gross, Total			2,922	2,953
Consumer Loans [Member]
Balance	166	150
Charge-offs	(49)	(33)
Recoveries	14	13
Provision for loan losses	6	(4)
Balance	137	126
Individually evaluated for loss
Collectively evaluated for loss			137	166
Total	$ 166	$ 150	137	166
Individually evaluated for loss			41	45
Collectively evaluated for loss			24,119	25,383
Loans and Leases Receivable, Gross, Total			$ 24,160	$ 25,428

X

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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