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	Less: KSOP-Owned Shares
Beginning balance at Dec. 31, 2016	$ 110,253	$ 0	$ 9,616	$ 101,736	$ 57,160	$ (20,111)	$ (6,487)	$ (31,661)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	11,631				11,631
Other comprehensive income (loss)	1,645						1,645
Terminated KSOP put option	34,300							34,300
Exercise of stock options	84		5	55		24
Sale of common stock	55,755		2,300	53,455
Stock based compensation	247			247
Net change in fair value of KSOP shares	(2,639)							(2,639)
Dividends: Common - $.43 and $.39 per share in 2018 and 2017, respectively	(4,013)				(4,013)
Ending balance at Sep. 30, 2017	207,263	0	11,921	155,493	64,778	(20,087)	(4,842)	0
Beginning balance at Dec. 31, 2017	207,345	0	11,921	155,601	66,037	(20,087)	(6,127)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	14,084				14,084
Other comprehensive income (loss)	(4,492)						(4,492)
Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income	0				486		(486)
Exercise of stock options	140		6	134
Purchase of treasury stock	(9)					(9)
Issuance of common stock	29,568		900	28,668
Stock based compensation	378			378
Net change in fair value of KSOP shares	0
Dividends: Common - $.43 and $.39 per share in 2018 and 2017, respectively	(5,017)				(5,017)
Ending balance at Sep. 30, 2018	$ 241,997	$ 0	$ 12,827	$ 184,781	$ 75,590	$ (20,096)	$ (11,105)	$ 0