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Loans and Allowance for Loan Losses - Schedule of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable, Gross, Total	$ 467,137		$ 439,236
Net deferred loan costs and loans in process	94		(34)
Allowance for loan losses	(5,835)	$ (5,644)	(5,459)	$ (5,326)	$ (5,327)	$ (5,344)
Loans, net	461,396		433,743
One-To-Four Family Residential Real Estate Loan [Member]
Loans and Leases Receivable, Gross, Total	138,267		136,215
Allowance for loan losses	(439)	(477)	(542)	(499)	(493)	(504)
Loans, net	138,267		136,215
Construction and Land Loan [Member]
Loans and Leases Receivable, Gross, Total	26,453		19,356
Allowance for loan losses	(109)	(121)	(181)	(70)	(71)	(53)
Loans, net	26,453		19,356
Commercial Real Estate Loan [Member]
Loans and Leases Receivable, Gross, Total	121,946		120,624
Allowance for loan losses	(1,466)	(1,562)	(1,540)	(1,709)	(1,740)	(1,777)
Loans, net	121,946		120,624
Commercial Loan [Member]
Loans and Leases Receivable, Gross, Total	66,531		54,591
Allowance for loan losses	(1,693)	(1,484)	(1,226)	(1,081)	(1,101)	(1,119)
Loans, net	66,531		54,591
Agriculture Loan [Member]
Loans and Leases Receivable, Gross, Total	87,901		83,008
Allowance for loan losses	(2,005)	(1,867)	(1,812)	(1,772)	(1,731)	(1,684)
Loans, net	87,901		83,008
Municipal Loan [Member]
Loans and Leases Receivable, Gross, Total	3,172		3,396
Allowance for loan losses	(7)	$ (7)	(8)	$ (10)	$ (11)	$ (12)
Loans, net	3,172		3,396
Consumer Loan [Member]
Loans and Leases Receivable, Gross, Total	22,867		22,046
Allowance for loan losses	(116)		(150)
Loans, net	$ 22,867		$ 22,046

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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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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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