Consolidated Statements of Equity - USD ($) $ in Thousands		Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock	Total Shareholders' Equity	Non-Controlling Interest
Balance at Dec. 31, 2018		$ 154,996	$ 1,224	$ 1,095	$ 112,807	$ 42,079	$ (633)	$ (3,015)	$ 153,557	$ 1,439
Balance (in shares) at Dec. 31, 2018				10,953,081
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		22,649				22,293			22,293	356
Common stock options exercised (in shares)				11,869
Common stock options exercised		48		$ 1	47				48
Preferred stock shares conversion (in shares)				90,532
Preferred stock shares conversion		0	(724)	$ 9	715
Other comprehensive income (loss)		694					694		694
Stock compensation expense		135			135				135
Dividend on preferred stock		(16)				(16)			(16)
Dividend on common stock		(4,962)				(4,962)			(4,962)
Balance at Sep. 30, 2019		173,544	500	$ 1,105	113,704	59,394	61	(3,015)	171,749	1,795
Balance (in shares) at Sep. 30, 2019				11,055,482
Balance at Jun. 30, 2019		167,255	550	$ 1,105	113,613	53,362	(54)	(3,015)	165,561	1,694
Balance (in shares) at Jun. 30, 2019				11,049,230
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		7,865				7,764			7,764	101
Preferred stock shares conversion (in shares)				6,252
Preferred stock shares conversion		0	(50)		50
Other comprehensive income (loss)		115					115		115
Stock compensation expense		41			41				41
Dividend on preferred stock		(8)				(8)			(8)
Dividend on common stock		(1,724)				(1,724)			(1,724)
Balance at Sep. 30, 2019		173,544	500	$ 1,105	113,704	59,394	61	(3,015)	171,749	1,795
Balance (in shares) at Sep. 30, 2019				11,055,482
Balance at Dec. 31, 2019		179,424	500	$ 1,213	134,706	44,143	58	(3,015)	177,605	1,819
Balance (in shares) at Dec. 31, 2019				12,132,855
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		20,655				20,296			20,296	359
Earnings distribution to non-controlling interest		(594)								(594)
Common stock options exercised (in shares)				845
Common stock options exercised		0
Preferred stock shares conversion (in shares)				2,751
Preferred stock shares conversion		0	(20)	$ 1	19
Other comprehensive income (loss)		445					445		445
Stock compensation expense		195			195				195
Stock dividend (in shares)	[1]			(60)
Stock dividend	[1]	(3)			(1)	(2)			(3)
Dividend on preferred stock		(22)				(22)			(22)
Dividend on common stock		(5,689)				(5,689)			(5,689)
Balance at Sep. 30, 2020		194,411	480	$ 1,214	134,919	58,726	503	(3,015)	192,827	1,584
Balance (in shares) at Sep. 30, 2020				12,136,391
Balance at Jun. 30, 2020		189,741	500	$ 1,213	134,830	54,087	642	(3,015)	188,257	1,484
Balance (in shares) at Jun. 30, 2020				12,133,640
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		6,643				6,543			6,543	100
Preferred stock shares conversion (in shares)				2,751
Preferred stock shares conversion		0	(20)	$ 1	19
Other comprehensive income (loss)		(139)					(139)		(139)
Stock compensation expense		70			70				70
Dividend on preferred stock		(7)				(7)			(7)
Dividend on common stock		(1,897)				(1,897)			(1,897)
Balance at Sep. 30, 2020		$ 194,411	$ 480	$ 1,214	$ 134,919	$ 58,726	$ 503	$ (3,015)	$ 192,827	$ 1,584
Balance (in shares) at Sep. 30, 2020				12,136,391

[1] The Company retroactively adjusted the stock dividend declared in January 2020 into the December 2019 financial statements according to Generally Accepted Accounting Principles (GAAP). The actual shares of the stock dividend issued subsequently were less than the shares assumed for December 31, 2019 due to the cash distribution for fraction shares to the common shareholders. See accompanying notes to consolidated financial statements