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Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 567,240	$ 569,759	$ 557,209
Student loans, installment	42,983
Accrued interest receivable	5,086	3,895
Commitments to Extend Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value, concentration of risk, commitments	102,616	120,485
Standby Letters of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Fair value, concentration of risk, commitments	1,630	1,201
Total Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 52,471	49,005
Percentage of total loans (in hundredths)	9.30%
Commercial and Business Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 51,078	47,464
Government Program Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,393	1,541
Total Real Estate Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 282,255	288,200
Percentage of total loans (in hundredths)	49.80%
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 202,364	200,213
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 79,319	87,388
Residential Mortgages | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period	3 years
Residential Mortgages | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period	15 years
Home Improvement and Home Equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 572	599
Real Estate Construction and Development Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 124,749	130,687
Percentage of total loans (in hundredths)	22.00%
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 58,432	56,918
Percentage of total loans (in hundredths)	10.30%
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 49,333	$ 44,949
Percentage of total loans (in hundredths)	8.70%
Student loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 3,131

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Amount before allowance of higher education or qualifying vocational and professional schools loans. Includes federally subsidized and personal loans and 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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