CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2017	$ 207,345	$ 0	$ 11,921	$ 155,601	$ 66,037	$ (20,087)	$ (6,127)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	4,359				4,359
Other comprehensive income (loss)	(2,899)						(2,899)
Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income					486		(486)
Stock based compensation	117			117
Dividends: Common Stock	(1,548)				(1,548)
Ending balance at Mar. 31, 2018	207,374	0	11,921	155,718	69,334	(20,087)	(9,512)
Beginning balance at Dec. 31, 2018	244,583	0	12,835	185,174	80,088	(24,352)	(9,162)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	5,337				5,337
Other comprehensive income (loss)	3,995						3,995
Exercise of stock options	481		19	462
Purchase of treasury stock	(2,215)					(2,215)
Restricted stock grants			31	(31)
Stock based compensation	137			137
Dividends: Common Stock	(2,008)				(2,008)
Ending balance at Mar. 31, 2019	$ 250,310	$ 0	$ 12,885	$ 185,742	$ 83,417	$ (26,567)	$ (5,167)