Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Beginning balance at Dec. 31, 2014	$ 55,852	$ 23,641	$ 20,833	$ 14,555	$ 376	$ (3,553)
Net income	4,378			4,378
Other comprehensive income (loss)	(614)				(614)
Cash dividend declared ($0.24 per share in 2015 $0.28 per share in 2016 $0.39 per share in 2017)	(1,082)			(1,082)
Treasury shares purchased net of 1 share reissued (123,065 shares in 2015 12,863 shares in 2017)	(1,850)					(1,850)
Ending balance at Dec. 31, 2015	56,684	23,641	20,833	17,851	(238)	(5,403)
Net income	4,871			4,871
Other comprehensive income (loss)	(2,723)				(2,723)
Cash dividend declared ($0.24 per share in 2015 $0.28 per share in 2016 $0.39 per share in 2017)	(1,237)			(1,237)
Equity compensation	75		45			30
Ending balance at Dec. 31, 2016	57,670	23,641	20,878	21,485	(2,961)	(5,373)
Net income	4,350			4,350
Other comprehensive income (loss)	1,430				1,430
Reclassification of certain income tax effects from accumulated other comprehensive income				294	(294)
Cash dividend declared ($0.24 per share in 2015 $0.28 per share in 2016 $0.39 per share in 2017)	(1,726)			(1,726)
Treasury shares purchased net of 1 share reissued (123,065 shares in 2015 12,863 shares in 2017)	(237)					(237)
Equity compensation	143		50			93
Ending balance at Dec. 31, 2017	$ 61,630	$ 23,641	$ 20,928	$ 24,403	$ (1,825)	$ (5,517)