CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Comprehensive Income (Loss) [Member]	Common Stock [Member]	Treasury Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Non-controlling Interest [Member]
Balance at beginning at Dec. 31, 2016	$ 224,477	$ (64,852)	$ 87	$ (2)	$ 269,849	$ (64,050)	$ 18,592
Balance at beginnng (in shares) at Dec. 31, 2016			8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(15,316)	(15,316)				(15,815)	499
Series D preferred stock dividends (9.0% per year)	(900)				(900)
Balance at ending at Dec. 31, 2017	208,261	(80,168)	$ 87	(2)	268,949	(79,865)	19,091
Balance at ending (in shares) at Dec. 31, 2017			8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	183,040	181,450				181,450	1,590
Series D preferred stock dividends (9.0% per year)	(900)				(900)
Redemption of Series D preferred stock	(10,000)				(9,999)
Balance at ending at Dec. 31, 2018	380,401	101,282	$ 87	(2)	258,050	101,585	20,681
Balance at ending (in shares) at Dec. 31, 2018			8,717,967
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distribution to equity partner	(197)				(197)
Net income (loss)	(26,137)	(26,920)				(26,920)	783
Balance at ending at Dec. 31, 2019	$ 354,067	$ 74,362	$ 87	$ (2)	$ 257,853	$ 74,665	$ 21,464
Balance at ending (in shares) at Dec. 31, 2019			8,717,967