Segments, Reconciliation of Net loss to Operating Margin (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Segments [Abstract]
Net loss	$ (1,734)	$ (39,509)	$ (166,519)	$ (60,223)	$ (41,243)	$ (226,574)
Selling, general and administrative	44,536		31,846		78,152	60,216
Transaction and integration costs	29,152		0		40,716	0
Contract termination charges and loss on mitigation sales	0		123,906		0	124,114
Depreciation and amortization	26,997		7,620		36,886	12,874
Interest expense	31,482		17,198		50,162	31,088
Other (income) expense, net	(7,457)		999		(8,058)	1,610
Loss on extinguishment of debt, net	0		0		0	9,557
Tax provision	4,409		117		3,532	113
(Income) loss from equity method investments	(38,941)		0		(38,941)	0
Consolidated Operating Margin	$ 88,444		$ 15,167		$ 121,206	$ 12,998