Consolidated Statements of Equity (unaudited) - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Total Shareholders' Equity	Non-Controlling Interest
Balance at Dec. 31, 2016	$ 127,090	$ 20,000	$ 715	$ 62,300	$ 47,483	$ (349)	$ (3,015)	$ 127,134	$ (44)
Balance (in shares) at Dec. 31, 2016			7,147,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Capital withdrawal by non-controlling interest	(53)								(53)
Net income	11,299				11,320			11,320	(21)
Common stock options exercised (shares)			7,270
Common stock options exercised	992		$ 0	992				992
Preferred stock options conversion (in shares)			112,467
Preferred stock shares conversion	(917)	(1,005)	$ 12	76				(917)
Other comprehensive income	206					206		206
Stock compensation expense	54			54				54
Stock dividend (shares)			688,846
Stock dividend	0		$ 69	15,499	(15,568)
Dividend on preferred stock	(880)				(880)			(880)
Dividend on common stock	(2,520)				(2,520)			(2,520)
Balance at Sep. 30, 2017	135,271	18,995	$ 796	78,921	39,835	(143)	(3,015)	135,389	(118)
Balance (in shares) at Sep. 30, 2017			7,956,535
Balance at Dec. 31, 2017	134,780	15,971	$ 830	81,940	39,184	(130)	(3,015)	134,780	0
Balance (in shares) at Dec. 31, 2017			8,301,497
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Retained earnings adjustment for stranded tax effects	27				27			27
Capital activity by non-controlling interest	1,225								1,225
Net income	18,105				17,997			17,997	108
Common stock options exercised (shares)			5,539
Common stock options exercised	43		$ 1	42				43
Preferred stock options conversion (in shares)			1,569,535
Preferred stock shares conversion	0	(12,554)	$ 157	12,397				0
Other comprehensive income	(831)					(831)		(831)
Stock compensation expense	67			67				67
Stock dividend (shares)			802,284
Stock dividend	(4)		$ 80	16,153	(16,237)			(4)
Dividend on preferred stock	(429)				(429)			(429)
Dividend on common stock	(3,778)				(3,778)			(3,778)
Balance at Sep. 30, 2018	$ 149,205	$ 3,417	$ 1,068	$ 110,599	$ 36,764	$ (961)	$ (3,015)	$ 147,872	$ 1,333
Balance (in shares) at Sep. 30, 2018			10,678,855