Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2016	$ 57,670	$ 23,641	$ 20,878	$ 21,485	$ (2,961)	$ (5,373)
Net income	4,329			4,329
Other comprehensive income (loss)	1,170				1,170
Cash dividend declared	(1,373)			(1,373)
Treasury shares purchased	(170)					(170)
Equity compensation	108		15			93
Ending balance at Sep. 30, 2017	61,734	23,641	20,893	24,441	(1,791)	(5,450)
Net income	2,147
Other comprehensive income (loss)	167
Ending balance at Sep. 30, 2017	61,734	23,641	20,893	24,441	(1,791)	(5,450)
Beginning balance at Dec. 31, 2017	61,630	23,641	20,928	24,403	(1,825)	(5,517)
Net income	6,811			6,811
Other comprehensive income (loss)	(3,399)				(3,399)
Cash dividend declared	(1,670)			(1,670)
Treasury shares purchased	(1,493)					(1,493)
Equity compensation	166		8			158
Ending balance at Sep. 30, 2018	62,045	23,641	20,936	29,544	(5,224)	(6,852)
Net income	1,972
Other comprehensive income (loss)	(1,111)
Ending balance at Sep. 30, 2018	$ 62,045	$ 23,641	$ 20,936	$ 29,544	$ (5,224)	$ (6,852)