Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	$ 723,394	$ 2,123,511
Money market deposit account	535,400	921,000
Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	723,394	1,070,979
Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		1,050,000
Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		2,532
Level 1
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	723,394	2,123,511
Level 1 | Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	723,394	1,070,979
Level 1 | Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		1,050,000
Level 1 | Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		2,532
Level 2
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	0	0
Level 2 | Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	0	0
Level 2 | Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		0
Level 2 | Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		0
Level 3
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	0	0
Level 3 | Money market funds | Cash and cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets	$ 0	0
Level 3 | Money market funds | Restricted cash equivalents
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		0
Level 3 | Marketable equity securities | Prepaid expenses and other current assets
Fair Value By Fair Value Hierarchy Level [Line Items]
Financial assets		$ 0