Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained earnings	Treasury stock	Accumulated other comprehensive income (loss)
Balances at Dec. 31, 2017	$ 58,661	$ 9,882	$ 755	$ 57,197	$ (4,077)	$ (5,096)
Common Stock, Shares, net of treasury at Dec. 31, 2017		4,465,576
Net income	7,508			7,508
Other comprehensive income (loss)	(1,516)					(1,516)
Dividend reinvestment plan	23		19		4
Dividend reinvestment plan, shares		430
Cash dividends declared ($0.31 and $0.30 per share for the three months ended September 30, 2019 and 2018, respectively, and $0.93 and $0.90 per share for the nine months ended September 30, 2019 and 2018, respectively)	(4,019)			(4,019)
Stock based compensation expense	123		123
Purchase of treasury stock	(3)				(3)
Purchase of treasury stock, shares		(60)
Balances at Sep. 30, 2018	60,777	$ 9,882	897	60,686	(4,076)	(6,612)
Common Stock, Shares, net of treasury at Sep. 30, 2018		4,465,946
Balances at Jun. 30, 2018	60,109	$ 9,882	850	59,715	(4,078)	(6,260)
Common Stock, Shares, net of treasury at Jun. 30, 2018		4,465,803
Net income	2,311			2,311
Other comprehensive income (loss)	(352)					(352)
Dividend reinvestment plan	8		6		2
Dividend reinvestment plan, shares		143
Cash dividends declared ($0.31 and $0.30 per share for the three months ended September 30, 2019 and 2018, respectively, and $0.93 and $0.90 per share for the nine months ended September 30, 2019 and 2018, respectively)	(1,340)			(1,340)
Stock based compensation expense	41		41
Balances at Sep. 30, 2018	60,777	$ 9,882	897	60,686	(4,076)	(6,612)
Common Stock, Shares, net of treasury at Sep. 30, 2018		4,465,946
Balances at Dec. 31, 2018	64,491	$ 9,888	894	58,911	(4,179)	(1,023)
Common Stock, Shares, net of treasury at Dec. 31, 2018		4,466,679
Net income	7,889			7,889
Other comprehensive income (loss)	2,186					2,186
Dividend reinvestment plan	27		21		6
Dividend reinvestment plan, shares		664
Cash dividends declared ($0.31 and $0.30 per share for the three months ended September 30, 2019 and 2018, respectively, and $0.93 and $0.90 per share for the nine months ended September 30, 2019 and 2018, respectively)	(4,155)			(4,155)
Stock based compensation expense	144		144
Exercise of stock options	44	$ 4	40
Exercise of stock options, shares		2,000
Purchase of treasury stock	(13)				(13)
Purchase of treasury stock, shares		(300)
Balances at Sep. 30, 2019	70,613	$ 9,892	1,099	62,645	(4,186)	1,163
Common Stock, Shares, net of treasury at Sep. 30, 2019		4,469,043
Balances at Jun. 30, 2019	68,736	$ 9,890	1,020	61,292	(4,188)	722
Common Stock, Shares, net of treasury at Jun. 30, 2019		4,467,845
Net income	2,738			2,738
Other comprehensive income (loss)	441					441
Dividend reinvestment plan	7		5		2
Dividend reinvestment plan, shares		198
Cash dividends declared ($0.31 and $0.30 per share for the three months ended September 30, 2019 and 2018, respectively, and $0.93 and $0.90 per share for the nine months ended September 30, 2019 and 2018, respectively)	(1,385)			(1,385)
Stock based compensation expense	54		54
Exercise of stock options	22	$ 2	20
Exercise of stock options, shares		1,000
Balances at Sep. 30, 2019	$ 70,613	$ 9,892	$ 1,099	$ 62,645	$ (4,186)	$ 1,163
Common Stock, Shares, net of treasury at Sep. 30, 2019		4,469,043