Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance at Dec. 31, 2016	$ 57,670	$ 23,641	$ 20,878	$ 21,485	$ (2,961)	$ (5,373)
Net income	2,182			2,182
Other comprehensive income (loss)	1,003				1,003
Cash dividend declared	(1,018)			(1,018)
Equity compensation	73		(20)			93
Ending balance at Jun. 30, 2017	59,910	23,641	20,858	22,649	(1,958)	(5,280)
Net income	1,182
Other comprehensive income (loss)	1,004
Ending balance at Jun. 30, 2017	59,910	23,641	20,858	22,649	(1,958)	(5,280)
Beginning balance at Dec. 31, 2017	61,630	23,641	20,928	24,403	(1,825)	(5,517)
Net income	4,839			4,839
Other comprehensive income (loss)	(2,288)				(2,288)
Cash dividend declared	(972)			(972)
Treasury shares purchased (70,181 shares)	(1,493)					(1,493)
Equity compensation	108		(50)			158
Ending balance at Jun. 30, 2018	61,824	23,641	20,878	28,270	(4,113)	(6,852)
Net income	3,302
Other comprehensive income (loss)	77
Ending balance at Jun. 30, 2018	$ 61,824	$ 23,641	$ 20,878	$ 28,270	$ (4,113)	$ (6,852)