Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 569,759	$ 515,318	$ 457,919
Installment loans, consumer, student	38,514
Accrued interest	3,895	2,220
Loans to directors, officers, principal shareholders and their affiliates [Roll Forward]
Aggregate amount outstanding, beginning of year	3,754	2,120	2,916
New loans or advances during year	3,788	3,946	796
Repayments during year	(1,704)	(2,312)	(1,592)
Aggregate amount outstanding, end of year	5,838	3,754	2,120
Loan commitments, end of year	4,891	7,431	$ 3,761
Commitments to extend credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial instrument commitments	120,485	107,084
Standby letters of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial instrument commitments	$ 1,201	3,295
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period	3 years
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity period	15 years
Commercial and Business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 47,464	54,503
Government Program Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,541	1,323
Total Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 49,005	55,826
Percentage of total loans (percent)	8.60%
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 200,213	182,554
Residential Mortgages
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	87,388	68,811
Home Improvement and Home Equity loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	599	867
Total Real Estate Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 288,200	252,232
Percentage of total loans (percent)	50.60%
Real Estate Construction and Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 130,687	130,596
Percentage of total loans (percent)	22.90%
Agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 56,918	52,137
Percentage of total loans (percent)	10.00%
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 44,949	$ 24,527
Percentage of total loans (percent)	7.90%
Student loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	$ 1,850