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, 2015	$ 102,352	$ 0	$ 9,616	$ 101,525	$ 49,654	$ (16,486)	$ (6,573)	$ (35,384)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	8,547				8,547
Other comprehensive income	2,593						2,593
Terminated KSOP put option	0
Purchase of treasury stock	(10,261)					(7,261)		(3,000)
Sale of treasury stock	8,557					8,557
Stock based compensation	162			162
Net change in fair value of KSOP shares	(1,539)							(1,539)
Dividends: Common - $0.26 and $0.39 per share for the nine months ended September 30, 2016 and 2017	(2,328)				(2,328)
Ending balance at Sep. 30, 2016	108,083	0	9,616	101,687	55,873	(15,190)	(3,980)	(39,923)
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	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 - $0.26 and $0.39 per share for the nine months ended September 30, 2016 and 2017	(4,013)				(4,013)
Ending balance at Sep. 30, 2017	$ 207,263	$ 0	$ 11,921	$ 155,493	$ 64,778	$ (20,087)	$ (4,842)	$ 0