Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained Earnings	Treasury Stock	Accumulated other comprehensive income (loss)
Balances at Dec. 31, 2013	$ 49,820	$ 9,855	$ 363	$ 43,405	$ (3,880)	$ 77
Common Stock, Shares, net of treasury at Dec. 31, 2013		4,458,359
Net income	7,694			7,694
Other comprehensive loss	(1,457)					(1,457)
Dividend reinvestment plan	0
Cash dividends declared ($1.11, $1.08 and $1.04 per share for the year ended December 31, 2016, 2015 and 2014, respectively)	(4,637)			(4,637)
Stock based compensation expense	20		20
Exercise of stock options	39	$ 4	35
Exercise of stock options, shares		2,010
Purchase of treasury stock	(45)				(45)
Purchase of treasury stock, shares		(1,939)
Balances at Dec. 31, 2014	51,434	$ 9,859	418	46,462	(3,925)	(1,380)
Common Stock, Shares, net of treasury at Dec. 31, 2014		4,458,430
Net income	7,878			7,878
Other comprehensive loss	(922)					(922)
Dividend reinvestment plan	0
Cash dividends declared ($1.11, $1.08 and $1.04 per share for the year ended December 31, 2016, 2015 and 2014, respectively)	(4,816)			(4,816)
Stock based compensation expense	35		35
Exercise of stock options	53	$ 5	48
Exercise of stock options, shares		2,500
Purchase of treasury stock	(94)				(94)
Purchase of treasury stock, shares		(3,753)
Balances at Dec. 31, 2015	53,568	$ 9,864	501	49,524	(4,019)	(2,302)
Common Stock, Shares, net of treasury at Dec. 31, 2015		4,457,177
Net income	8,511			8,511
Other comprehensive loss	(977)					(977)
Dividend reinvestment plan	10		7		3
Dividend reinvestment plan, shares		315
Cash dividends declared ($1.11, $1.08 and $1.04 per share for the year ended December 31, 2016, 2015 and 2014, respectively)	(4,949)			(4,949)
Stock based compensation expense	66	$ 5	61
Stock based compensation expense, shares		2,356
Exercise of stock options	56	$ 5	51
Exercise of stock options, shares		2,500
Purchase of treasury stock	(6)				(6)
Purchase of treasury stock, shares		(213)
Balances at Dec. 31, 2016	$ 56,279	$ 9,874	$ 620	$ 53,086	$ (4,022)	$ (3,279)
Common Stock, Shares, net of treasury at Dec. 31, 2016		4,462,135