CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Preferred Stock	Retained Earnings	Accumulated Other Comprehensive Income	Total
Beginning Balance at Dec. 31, 2014	$ 12,662		$ 64,489	$ 791	$ 77,942
Balances (in shares) at Dec. 31, 2014	2,720,098
Increase (Decrease) in Stockholders' Equity
Assumption of Madison Financial Corporation preferred stock		$ 4,390			4,390
Assumption of Madison Financial Corporation preferred stock (in shares)		12,047
Redemption of Madison Financial Corporation preferred stock		$ (4,390)			(4,390)
Redemption of Madison Financial Corporation preferred stock (in shares)		(12,047)
Common stock issued - stock awards	$ 2				2
Common stock issued - stock awards (in shares)	6,719
Shares issued to acquire Madison Financial Corporation, net of issuance costs	$ 7,939				7,939
Shares issued to acquire Madison Financial Corporation, net of issuance costs (in shares)	263,361
Stock compensation expense	$ 133				133
Common stock purchased and retired	$ (6)		(25)		(31)
Common stock purchased and retired (in shares)	(973)
Other comprehensive income				(432)	(432)
Net income			6,832		6,832
Dividends declared			(2,972)		(2,972)
Ending Balance at Dec. 31, 2015	$ 20,730		68,324	359	89,413
Balances (in shares) at Dec. 31, 2015	2,989,205
Increase (Decrease) in Stockholders' Equity
Common stock issued - stock awards	$ 49				49
Common stock issued - stock awards (in shares)	6,341
Stock compensation expense	$ 153				153
Common stock purchased and retired	$ (165)		(503)		(668)
Common stock purchased and retired (in shares)	(22,314)
Other comprehensive income				(1,315)	(1,315)
Net income			8,569		8,569
Dividends declared			(3,229)		(3,229)
Ending Balance at Dec. 31, 2016	$ 20,767		73,161	(956)	92,972
Balances (in shares) at Dec. 31, 2016	2,973,232
Increase (Decrease) in Stockholders' Equity
Common stock issued - stock awards	$ 64				64
Common stock issued - stock awards (in shares)	7,320
Stock compensation expense	$ 163				163
Common stock purchased and retired	$ (63)		(200)		(263)
Common stock purchased and retired (in shares)	(9,030)
Reclassification of disproportionate tax effects			164	(164)
Other comprehensive income				123	123
Net income			10,717		10,717
Dividends declared			(3,447)		(3,447)
Ending Balance at Dec. 31, 2017	$ 20,931		$ 80,395	$ (997)	$ 100,329
Balances (in shares) at Dec. 31, 2017	2,971,522