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Marketable Securities - Schedule Of Equity Investments (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]        
Sale of non-marketable equity investment $ 24,000 $ 23,979 $ 0  
Gain on sale of investment 23,800 23,835 $ 132  
Equity Investments 1,147,660 1,147,660   $ 60,566
Cash and cash equivalents | Money market funds        
Debt Securities, Available-for-sale [Line Items]        
Marketable equity investments 1,140,671 1,140,671   56,474
Cash and cash equivalents | Corporate debt securities        
Debt Securities, Available-for-sale [Line Items]        
Marketable equity investments 3,000 3,000   0
Marketable securities        
Debt Securities, Available-for-sale [Line Items]        
Marketable equity investments 3,622 3,622   3,575
Other assets        
Debt Securities, Available-for-sale [Line Items]        
Non-marketable equity investments $ 367 $ 367   $ 517