XML 39 R30.htm IDEA: XBRL DOCUMENT v3.22.2.2
Fair Value Measurements - Financial Assets Measured at Fair Value on a Recurring Basis by Level Within Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Financial Assets, Amortized Cost $ 2,364,039 $ 764,540
Financial Assets, Gross Unrealized Holding Gains 0 0
Financial Assets, Gross Unrealized Holding Losses (11,626) (872)
Financial Assets, Aggregate Fair Value 2,352,413 763,668
Level 1 | Money Market Funds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Financial Assets, Amortized Cost 978,367 [1] 345,098 [2]
Financial Assets, Gross Unrealized Holding Gains 0 [1] 0 [2]
Financial Assets, Gross Unrealized Holding Losses 0 [1] 0 [2]
Financial Assets, Aggregate Fair Value 978,367 [1] 345,098 [2]
Level 2 | U.S. Government Treasuries    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Financial Assets, Amortized Cost 1,385,672 419,442
Financial Assets, Gross Unrealized Holding Gains 0 0
Financial Assets, Gross Unrealized Holding Losses (11,626) (872)
Financial Assets, Aggregate Fair Value $ 1,374,046 $ 418,570
[1] Includes $21.7 million of restricted cash equivalents.
[2] Includes $15.6 million of restricted cash equivalents.