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Loans and Allowance for Loan Losses - Schedule of Impaired Financing Receivables (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Unpaid contractual principal	$ 10,968	$ 11,710
Impaired loan balance	9,018	9,760
Impaired loans without an allowance	4,676	5,551
Impaired loans with an allowance	4,342	4,209
Related allowance recorded	853	642
Year-to-date average loan balance	9,208	10,017
Year-to-date interest income recognized	313	569
One-To-Four Family Residential Real Estate Loan [Member]
Unpaid contractual principal	651	747
Impaired loan balance	651	747
Impaired loans without an allowance	395	503
Impaired loans with an allowance	256	244
Related allowance recorded	85	73
Year-to-date average loan balance	661	774
Year-to-date interest income recognized	5	8
Construction and Land Loan [Member]
Unpaid contractual principal	3,376	3,766
Impaired loan balance	1,641	2,031
Impaired loans without an allowance	1,641	430
Impaired loans with an allowance		1,601
Related allowance recorded		102
Year-to-date average loan balance	1,736	2,033
Year-to-date interest income recognized	29	65
Commercial Real Estate Loan [Member]
Unpaid contractual principal	3,920	3,973
Impaired loan balance	3,920	3,973
Impaired loans without an allowance	2,127	3,888
Impaired loans with an allowance	1,793	85
Related allowance recorded	14	52
Year-to-date average loan balance	3,926	3,989
Year-to-date interest income recognized	243	490
Commercial Loan [Member]
Unpaid contractual principal	2,032	2,002
Impaired loan balance	2,032	2,002
Impaired loans without an allowance	3	11
Impaired loans with an allowance	2,029	1,991
Related allowance recorded	728	391
Year-to-date average loan balance	2,055	2,082
Year-to-date interest income recognized	8
Agriculture Loan [Member]
Unpaid contractual principal	817	1,048
Impaired loan balance	602	833
Impaired loans without an allowance	344	545
Impaired loans with an allowance	258	288
Related allowance recorded	25	24
Year-to-date average loan balance	652	912
Year-to-date interest income recognized	27	1
Municipal Loan [Member]
Unpaid contractual principal	126	140
Impaired loan balance	126	140
Impaired loans without an allowance	126	140
Impaired loans with an allowance
Related allowance recorded
Year-to-date average loan balance	132	192
Year-to-date interest income recognized	1	5
Consumer Loan [Member]
Unpaid contractual principal	46	34
Impaired loan balance	46	34
Impaired loans without an allowance	40	34
Impaired loans with an allowance	6
Related allowance recorded	1
Year-to-date average loan balance	46	35
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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
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