Summary of Significant Accounting Policies - Liquidity Matters (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended
	Nov. 08, 2022	Jul. 31, 2021	Apr. 30, 2020	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Policies
Net (loss) income				$ (121,480)	$ (151,273)	$ (405,226)	$ (331,152)
Accumulated deficit				1,800,062		1,800,062		$ 1,394,836
Cash, cash equivalents and restricted cash				57,128	$ 95,331	57,128	$ 95,331	84,614	$ 48,855
Marketable securities				464,112		464,112		829,896
Short-term Credit Line, outstanding balance				50,147		50,147		$ 50,052
Remaining borrowing capacity				$ 100,000		$ 100,000
Common stock, shares issued				97,300,000		97,300,000		95,140,000
Subsequent event
Policies
Borrowings under credit facility	$ 30,000
Convertible Notes
Policies
Outstanding principal balance			$ 287,500	$ 287,500		$ 287,500
Per annum interest rate (as a percent)			2.25%			2.25%
Net proceeds			$ 278,300
Equity offering
Policies
Common stock, shares issued		5,175,000
Stock issued (in dollars per share)		$ 113
Payment of offering expenses		$ 400
Proceeds from issuance of common stock		$ 551,200