UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Warrants [Member]	Additional Paid in Capital [Member]	Accumulated Earnings (Deficit) [Member]
Balance at Dec. 31, 2018	$ 416,558	$ 3	$ 4,788	$ 355,872	$ 55,895
Net loss	(31,477)	0	0	0	(31,477)
Costs incurred in conjunction with tender offer	(107)	0	0	(107)	0
Share-based compensation expense	1,443	0	0	1,443	0
Common stock repurchased and retired under the share repurchase program	(920)	0	0	(920)	0
Balance at Mar. 31, 2019	385,497	3	4,788	356,288	24,418
Balance at Dec. 31, 2019	434,207	209	4,790	424,399	4,809
Net loss	(367,199)	0	0	0	(367,199)
Share-based compensation expense	(1,112)	0	0	(1,112)	0
Restricted shares repurchased	(14)	0	0	(14)	0
Dividends	(3,786)	0	0	0	(3,786)
Balance at Mar. 31, 2020	$ 62,096	$ 209	$ 4,790	$ 423,273	$ (366,176)