Business Combination - Reconciliation of Transaction Costs (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 21, 2021	Sep. 30, 2021	Sep. 30, 2020
Business Combination and Asset Acquisition [Abstract]
Proceeds from issuance of Class A Common Stock in the Business Combination	$ 229,583	$ 229,583	$ 0
Transaction costs paid in connection with the Business Combination	(23,148)
Net proceeds from issuance of Class A Common Stock in the Business Combination	206,435
Net assets acquired and liabilities assumed in the Business Combination, exclusive of cash and accrued transaction costs	(3,421)
Obligation to issue registered shares of Class A Common Stock for transaction services	(32,900)
Net assets and liabilities acquired in the Business Combination	170,114
Gross proceeds from issuance of Class A Common Stock upon the PIPE Financing	761,400	761,400	0
Transaction costs paid in connection with the issuance of Class A Common Stock upon the PIPE Financing	(61,130)	(61,130)	0
Reclassification of deferred transaction costs paid in prior periods against proceeds received in the Business Combination	(7,865)
Transaction costs paid in connection with the Business Combination	(23,148)	(23,148)	0
Transaction costs paid in connection with the PIPE Financing	(61,130)	(61,130)	0
Reclassification of deferred transaction costs paid in prior periods against the proceeds received in the Business Combination		$ 7,865	$ 0
Net proceeds from issuance of Class A Common Stock in the Business Combination	692,405
Total transaction costs in connection with the Business Combination and the PIPE Financing	$ (125,043)