Condensed Consolidated Statement of Equity - USD ($) $ in Thousands	Total	Members' Equity [Member]	Accumulated Earnings (Deficit) [Member]
Balance, beginning at Dec. 31, 2019	$ 2,096,954	$ 2,096,954	$ 0
Equity [Roll Forward]
Distributions to member	(308,002)	(123,995)	(184,007)
Net income (loss)	184,007	0	184,007
Balance, ending at Sep. 30, 2020	1,972,959	1,972,959	0
Balance, beginning at Jun. 30, 2020	2,022,376	2,022,376	0
Equity [Roll Forward]
Distributions to member	(111,304)	(49,417)	(61,887)
Net income (loss)	61,887	0	61,887
Balance, ending at Sep. 30, 2020	1,972,959	1,972,959	0
Balance, beginning at Dec. 31, 2020	1,936,951	1,936,951	0
Equity [Roll Forward]
Distributions to member	(317,124)	(105,671)	(211,453)
Net income (loss)	211,453		211,453
Balance, ending at Sep. 30, 2021	1,831,280	1,831,280	0
Balance, beginning at Jun. 30, 2021	1,874,753	1,874,753	0
Equity [Roll Forward]
Distributions to member	(117,576)	(43,473)	(74,103)
Net income (loss)	74,103	0	74,103
Balance, ending at Sep. 30, 2021	$ 1,831,280	$ 1,831,280	$ 0