Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Employee Stock [Member] Common Stock [Member]	Employee Stock [Member] Additional Paid-in Capital [Member]	Employee Stock [Member] Retained Earnings [Member]	Employee Stock [Member] AOCI Attributable to Parent [Member]	Employee Stock [Member] Treasury Stock [Member]	Employee Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 31, 2014							3,316,658
Balance at Dec. 31, 2014							$ 2,176	$ 14,819	$ 70,928	$ 907	$ (2,476)	$ 86,354
Numerator for basic and diluted earnings per share - net income									4,070			4,070
Other comprehensive income, net of tax										(614)		(614)
Cash dividends declared ($0.60 per share)									(1,931)			(1,931)
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)	1,721						16,123
Stock issued in connection with dividend reinvestment and stock purchase plan	$ 1	$ 42				$ 43	$ 10	443				$ 453
Stock issued for options exercised (in shares)							7,802					11,650
Stock issued for options exercised							$ 5	91				$ 96
Tax benefit of stock options exercised								20				20
Stock-based compensation expense								46				46
Balance (in shares) at Jun. 30, 2015							3,342,304
Balance at Jun. 30, 2015							$ 2,192	15,461	73,067	293	(2,476)	$ 88,537
Balance (in shares) at Dec. 31, 2015							3,359,794					3,359,794
Balance at Dec. 31, 2015							$ 2,203	15,973	75,289	(546)	(2,476)	$ 90,443
Numerator for basic and diluted earnings per share - net income									4,363			4,363
Other comprehensive income, net of tax										3,620		3,620
Cash dividends declared ($0.60 per share)									(2,027)			(2,027)
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)	1,540						16,314
Stock issued in connection with dividend reinvestment and stock purchase plan	$ 1	$ 40				$ 41	$ 10	467				$ 477
Stock issued for options exercised (in shares)							13,552					17,980
Stock issued for options exercised							$ 8	228				$ 236
Tax benefit of stock options exercised								12				12
Stock-based compensation expense								42				$ 42
Balance (in shares) at Jun. 30, 2016							3,391,200					3,391,200
Balance at Jun. 30, 2016							$ 2,222	$ 16,762	$ 77,625	$ 3,074	$ (2,476)	$ 97,207