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)
Common stock options exercised (shares)			7,260
Common stock options exercised	232		$ 0	232				232
Preferred stock options conversion (in shares)			17,774
Preferred stock shares conversion	(157)	(172)	$ 2	13				(157)
Other comprehensive income	138					138		138
Net income	7,141				7,159			7,159	(18)
Stock compensation expense	36			36				36
Stock dividend (shares)			688,846
Stock dividend	0		$ 69	15,499	(15,568)
Dividend on preferred stock	(596)				(596)			(596)
Dividend on common stock	(1,599)				(1,599)			(1,599)
Balance at Jun. 30, 2017	132,232	19,828	$ 786	78,080	36,879	(211)	(3,015)	132,347	(115)
Balance (in shares) at Jun. 30, 2017			7,861,832
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
Common stock options exercised (shares)			5,406
Common stock options exercised	41		$ 1	40				41
Preferred stock options conversion (in shares)			847,023
Preferred stock shares conversion	1	(6,776)	$ 85	6,692				1
Other comprehensive income	(667)					(667)		(667)
Net income	11,887				11,871			11,871	16
Stock compensation expense	41			41				41
Stock dividend (shares)			802,284
Stock dividend	(3)		$ 80	16,153	(16,236)			(3)
Dividend on preferred stock	(407)				(407)			(407)
Dividend on common stock	(2,283)				(2,283)			(2,283)
Balance at Jun. 30, 2018	$ 144,642	$ 9,195	$ 996	$ 104,866	$ 32,156	$ (797)	$ (3,015)	$ 143,401	$ 1,241
Balance (in shares) at Jun. 30, 2018			9,956,210