Loans - Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Allowance for loan losses:
Loans individually evaluated for impairment	$ 2,542	$ 1,133
Loans collectively evaluated for impairment	6,402	7,771
Total allowance balance:	8,944	8,904	$ 8,974	$ 8,591
Loan balances:
Loans individually evaluated for impairment	8,858	2,887
Loans collectively evaluated for impairment	679,234	682,888
Total loans balance:	688,092	685,775
Retail Residential Loan Portfolio
Loan balances:
Total loans balance:	82,809	85,152
Commercial \| Commercial Loan Portfolio
Allowance for loan losses:
Loans individually evaluated for impairment	724	493
Loans collectively evaluated for impairment	772	738
Total allowance balance:	1,496	1,231	752	648
Loan balances:
Loans individually evaluated for impairment	975	598
Loans collectively evaluated for impairment	91,029	79,689
Total loans balance:	92,004	80,287
Agriculture & AG RE \| Commercial Loan Portfolio
Allowance for loan losses:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	88	120
Total allowance balance:	88	120	119	97
Loan balances:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	45,283	49,121
Total loans balance:	45,283	49,121
Commercial RE \| Commercial Loan Portfolio
Allowance for loan losses:
Loans individually evaluated for impairment	575	92
Loans collectively evaluated for impairment	4,205	5,076
Total allowance balance:	4,780	5,168	5,541	5,681
Loan balances:
Loans individually evaluated for impairment	3,230	451
Loans collectively evaluated for impairment	435,703	438,875
Total loans balance:	438,933	439,326
Construction, Land & Development \| Commercial Loan Portfolio
Allowance for loan losses:
Loans individually evaluated for impairment	59	60
Loans collectively evaluated for impairment	513	585
Total allowance balance:	572	645	516	523
Loan balances:
Loans individually evaluated for impairment	103	129
Loans collectively evaluated for impairment	25,891	28,642
Total loans balance:	25,994	28,771
1-4 Family Residential \| Retail Residential Loan Portfolio
Allowance for loan losses:
Loans individually evaluated for impairment	1,184	488
Loans collectively evaluated for impairment	822	1,248
Total allowance balance:	2,006	1,736	2,042	1,628
Loan balances:
Loans individually evaluated for impairment	4,550	1,709
Loans collectively evaluated for impairment	78,259	83,443
Total loans balance:	82,809	85,152
Consumer \| Retail Residential Loan Portfolio
Allowance for loan losses:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	2	4
Total allowance balance:	2	4	$ 4	$ 14
Loan balances:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	3,069	3,118
Total loans balance:	$ 3,069	$ 3,118

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
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- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
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The balance of financing receivables that were collectively evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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