Loans - Classification of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 666,795		$ 633,547
Allowance for loan losses	(9,021)	$ (8,925)	(8,591)	$ (8,403)	$ (8,645)	$ (7,981)
Loans, net	657,774		624,956
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	68,046		67,360
Allowance for loan losses	(1,268)	(1,185)	(648)	(969)	(1,036)	(1,117)
Agriculture & AG RE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	45,520		50,121
Allowance for loan losses	(108)	(103)	(97)	(66)	(65)	(69)
Construction, Land & Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	32,046		26,016
Allowance for loan losses	(608)	(452)	(523)	(478)	(396)	(711)
Commercial RE
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	427,761		391,918
Allowance for loan losses	(5,033)	(5,243)	(5,681)	(5,205)	(5,185)	(3,999)
1-4 Family Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	90,260		95,227
Allowance for loan losses	(1,999)	(1,933)	(1,628)	(1,675)	(1,951)	(2,075)
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	3,162		2,905
Allowance for loan losses	$ (5)	$ (9)	$ (14)	$ (10)	$ (12)	$ (10)