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Fair Value of Financial Instruments and Fair Value Measurements (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets:
Loans held for sale, net		$ 10,726
Gain (Loss) on loans held for sale, net	$ 7,993	5,880	$ 3,777
Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale, net	14,465
Gain (Loss) on loans held for sale, net	(10)
Fair Value, Measurements, Nonrecurring [Member] | Commercial loans [Member]
Assets:
Impaired loans		206
Gain Loss On Impaired Loans Fair Value Disclosure		(28)
Fair Value, Measurements, Nonrecurring [Member] | Agriculture loans [Member]
Assets:
Impaired loans		134
Gain Loss On Impaired Loans Fair Value Disclosure		(5)
Fair Value, Measurements, Nonrecurring [Member] | Consumer loans [Member]
Assets:
Impaired loans	16	30
Gain Loss On Impaired Loans Fair Value Disclosure	6	(5)
Fair Value, Measurements, Nonrecurring [Member] | One-to-four family residential real estate [Member]
Assets:
Impaired loans	266	1,135
Gain Loss On Impaired Loans Fair Value Disclosure	(137)	(214)
Real estate owned		37
Gain Loss On Real Estate Owned Fair Value Disclosure		(25)
Fair Value, Measurements, Nonrecurring [Member] | Commercial real estate [Member]
Assets:
Impaired loans		30
Gain Loss On Impaired Loans Fair Value Disclosure		(17)
Real estate owned		45
Gain Loss On Real Estate Owned Fair Value Disclosure		(9)
Fair Value, Inputs, Level 1 [Member]
Assets:
Loans held for sale, net		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale, net	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial loans [Member]
Assets:
Impaired loans		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture loans [Member]
Assets:
Impaired loans		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer loans [Member]
Assets:
Impaired loans	0	0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | One-to-four family residential real estate [Member]
Assets:
Impaired loans	0	0
Real estate owned		0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial real estate [Member]
Assets:
Impaired loans		0
Real estate owned		0
Fair Value, Inputs, Level 2 [Member]
Assets:
Loans held for sale, net		10,726
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale, net	14,465
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial loans [Member]
Assets:
Impaired loans		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture loans [Member]
Assets:
Impaired loans		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer loans [Member]
Assets:
Impaired loans	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | One-to-four family residential real estate [Member]
Assets:
Impaired loans	0	0
Real estate owned		0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial real estate [Member]
Assets:
Impaired loans		0
Real estate owned		0
Fair Value, Inputs, Level 3 [Member]
Assets:
Loans held for sale, net		0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets:
Loans held for sale, net	0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial loans [Member]
Assets:
Impaired loans		206
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Agriculture loans [Member]
Assets:
Impaired loans		134
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Consumer loans [Member]
Assets:
Impaired loans	16	30
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | One-to-four family residential real estate [Member]
Assets:
Impaired loans	$ 266	1,135
Real estate owned		37
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Commercial real estate [Member]
Assets:
Impaired loans		30
Real estate owned		$ 45

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The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.3(a))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13(h))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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