Fair Value Measurements - Summary of Gain (Loss) Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value adjustments, net	$ (26,440)	$ 2,243	$ 7,000	$ 3,491
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	9,269	0	9,933	0
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain (loss) on equity securities	(35,709)	2,276	(3,702)	12,307
Realized gain (loss) on equity securities	0	(33)	769	(8,816)
Exchange agreement embedded derivative
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net	$ 9,269	$ 0	$ 9,933	$ 0