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Fair Value of Financial Instruments and Fair Value Measurements (Details 3) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
One-to-four family residential real estate [Member]
Fair Value Measurements Sales Comparison Range	10.00%
One-to-four family residential real estate [Member] | Minimum [Member]
Fair Value Measurements Sales Comparison Range		0.00%
One-to-four family residential real estate [Member] | Maximum [Member]
Fair Value Measurements Sales Comparison Range		40.00%
Commercial loans [Member]
Fair Value Measurements Sales Comparison Range	7.00%
Agriculture loans [Member] | Minimum [Member]
Fair Value Measurements Sales Comparison Range	15.00%
Agriculture loans [Member] | Maximum [Member]
Fair Value Measurements Sales Comparison Range	50.00%
Consumer loans [Member]
Fair Value Measurements Sales Comparison Range		0.00%
Consumer loans [Member] | Minimum [Member]
Fair Value Measurements Sales Comparison Range	6.00%
Consumer loans [Member] | Maximum [Member]
Fair Value Measurements Sales Comparison Range	20.00%
Fair Value, Measurements, Nonrecurring [Member] | One-to-four family residential real estate [Member]
Impaired Loans Fair Value Disclosure	$ 540	$ 266
Fair Value Measurements, Valuation Techniques	Sales comparison	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to appraised value	Adjustment to appraised value
Fair Value, Measurements, Nonrecurring [Member] | Commercial loans [Member]
Impaired Loans Fair Value Disclosure	$ 39
Fair Value Measurements, Valuation Techniques	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to appraised value
Fair Value, Measurements, Nonrecurring [Member] | Agriculture loans [Member]
Impaired Loans Fair Value Disclosure	$ 449
Fair Value Measurements, Valuation Techniques	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to appraised value
Fair Value, Measurements, Nonrecurring [Member] | Consumer loans [Member]
Impaired Loans Fair Value Disclosure	$ 26	$ 16
Fair Value Measurements, Valuation Techniques	Sales comparison	Sales comparison
Fair Value Measurements, Changes in Valuation Techniques	Adjustment to appraised value	Adjustment to comparable sales

X

- Definition

The range of Level 3 fair value measurements for impaired loans measured at fair value on a non-recurring basis.

+ References

No definition available.

+ Details

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X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as impaired loans disclosure.

+ References

No definition available.

+ Details

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- Definition

Description of the changes in valuation technique(s) and related inputs used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Details

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