CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 43,063	$ (243,413)	$ 30,638	$ (175,034)
Other comprehensive loss:
Change in pension and postretirement obligations, net of tax	1	(2)	4	(4)
Total other comprehensive income (loss), net	1	(2)	4	(4)
Comprehensive income (loss)	43,064	(243,415)	30,642	(175,038)
Net income attributable to Noncontrolling interest	(25,676)	0	(23,778)	0
Other comprehensive income attributable to Noncontrolling interest	(1)	0	(4)	0
Comprehensive income (loss) attributable to common shareholders	$ 17,387	$ (243,415)	$ 6,860	$ (175,038)