Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2017		$ 98,570	$ 2,258	$ 18,691	$ 84,183	$ (4,086)	$ (2,476)
Balance (in shares) at Dec. 31, 2017			3,448,108
Net income		9,008			9,008
Other comprehensive income (loss), net of tax		(6,348)				(6,348)
Cash dividends declared		(3,322)			(3,322)
Equity securities fair value reclassification	[1]				(254)	254
ASU 2018-02 stranded tax reclassification	[2]				805	(805)
Stock issued in connection with dividend reinvestment and stock purchase plan		716	$ 10	706
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)			16,463
Stock issued for employee stock purchase plan		57	$ 1	56
Stock issued for employee stock purchase (in shares)			1,426
Stock issued for options exercised		$ 69	$ 4	65
Stock issued for options exercised (in shares)		10,000	6,000
Stock-based compensation expense		$ 84		84
Balance at Sep. 30, 2018		98,834	$ 2,273	19,602	90,420	(10,985)	(2,476)
Balance (in shares) at Sep. 30, 2018			3,471,997
Balance at Jun. 30, 2018		97,818	$ 2,269	19,293	88,319	(9,587)	(2,476)
Balance (in shares) at Jun. 30, 2018			3,465,468
Net income		3,211			3,211
Other comprehensive income (loss), net of tax		(1,398)				(1,398)
Cash dividends declared		(1,110)			(1,110)
Stock issued in connection with dividend reinvestment and stock purchase plan		287	$ 4	283
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)			6,529
Stock-based compensation expense		26		26
Balance at Sep. 30, 2018		98,834	$ 2,273	19,602	90,420	(10,985)	(2,476)
Balance (in shares) at Sep. 30, 2018			3,471,997
Balance at Dec. 31, 2018		$ 104,348	$ 2,280	20,041	91,635	(7,132)	(2,476)
Balance (in shares) at Dec. 31, 2018		3,484,080	3,484,080
Net income		$ 9,612			9,612
Other comprehensive income (loss), net of tax		7,672				7,672
Cash dividends declared		(3,460)			(3,460)
Stock issued in connection with dividend reinvestment and stock purchase plan		638	$ 12	626
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)			18,150
Stock issued for employee stock purchase plan		54	$ 1	53
Stock issued for employee stock purchase (in shares)			1,617
Stock issued for options exercised		$ 37	$ 2	35
Stock issued for options exercised (in shares)		8,775	3,709
Stock-based compensation expense		$ 84		84
Balance at Sep. 30, 2019		$ 118,985	$ 2,295	20,839	97,787	540	(2,476)
Balance (in shares) at Sep. 30, 2019		3,507,556	3,507,556
Balance at Jun. 30, 2019		$ 115,878	$ 2,291	20,607	95,852	(396)	(2,476)
Balance (in shares) at Jun. 30, 2019			3,501,446
Net income		3,090			3,090
Other comprehensive income (loss), net of tax		936				936
Cash dividends declared		(1,155)			(1,155)
Stock issued in connection with dividend reinvestment and stock purchase plan		205	$ 4	201
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)			5,860
Stock issued for options exercised		7		7
Stock issued for options exercised (in shares)			250
Stock-based compensation expense		24		24
Balance at Sep. 30, 2019		$ 118,985	$ 2,295	$ 20,839	$ 97,787	$ 540	$ (2,476)
Balance (in shares) at Sep. 30, 2019		3,507,556	3,507,556

[1] Refer to Note 1, ASU 2016-01

[2] Refer to Note 1, ASU 2018-02