Income Taxes - Components of Provision for Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current income tax provision (benefit):
Federal	$ 0	$ 0	$ 0
State	0	0	151,000
Total current income tax provision (benefit)	0	0	151,000
Deferred income tax provision (benefit):
Federal	142,466,000	(41,582,000)	(72,516,000)
State	0	0	0
Total deferred income tax provision (benefit)	142,466,000	(41,582,000)	(72,516,000)
Total provision (benefit) from income taxes	$ 142,466,000	$ (41,582,000)	$ (72,365,000)