CONSOLIDATED STATEMENT OF EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Total Shareholders' Equity [Member]	Non-controlling Interest [Member]	Total
Balance at beginning at Dec. 31, 2018	$ 87	$ (2)	$ 258,050	$ 101,585	$ 359,720	$ 20,681	$ 380,401
Balance at beginnng (in shares) at Dec. 31, 2018	8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distribution to equity partner			(197)		(197)		(197)
Net income (loss)				(19,741)	(19,741)	583	(19,158)
Balance at ending at Sep. 30, 2019	$ 87	(2)	257,853	81,844	339,670	21,264	361,046
Balance at ending (in shares) at Sep. 30, 2019	8,717,967
Balance at beginning at Jun. 30, 2019	$ 87	(2)	257,938	89,631	347,654	21,243	368,897
Balance at beginnng (in shares) at Jun. 30, 2019	8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distribution to equity partner			(85)		(85)		(85)
Net income (loss)				(7,787)	(7,787)	21	(7,766)
Balance at ending at Sep. 30, 2019	$ 87	(2)	257,853	81,844	339,670	21,264	361,046
Balance at ending (in shares) at Sep. 30, 2019	8,717,967
Balance at beginning at Dec. 31, 2019	$ 87	(2)	257,853	74,665	332,603	21,464	354,067
Balance at beginnng (in shares) at Dec. 31, 2019	8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				8,148	8,148	400	8,548
Balance at ending at Sep. 30, 2020	$ 87	(2)	257,853	82,813	340,751	21,864	362,615
Balance at ending (in shares) at Sep. 30, 2020	8,717,967
Balance at beginning at Jun. 30, 2020	$ 87	(2)	257,853	75,120	333,058	21,864	354,922
Balance at beginnng (in shares) at Jun. 30, 2020	8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)				7,693	7,693		7,693
Balance at ending at Sep. 30, 2020	$ 87	$ (2)	$ 257,853	$ 82,813	$ 340,751	$ 21,864	$ 362,615
Balance at ending (in shares) at Sep. 30, 2020	8,717,967