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Fair Value Measurements - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Gross Unrealized Losses More Than 12 Months $ 51,013,000   $ 51,013,000   $ 88,694,000
Gross Unrealized Losses Less Than 12 Months 11,581,000   11,581,000   13,504,000
Interest earned on marketable securities 16,700,000 $ 15,600,000 33,900,000 $ 31,200,000  
Investment in equity securities, carrying value 30,700,000   30,700,000   76,900,000
Impairment of strategic investments 0 $ 0 46,154,000 $ 0  
2029 Senior Notes | Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of the notes 433,300,000   433,300,000   410,900,000
2031 Senior Notes | Level 2          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Fair value of the notes 424,100,000   424,100,000   399,400,000
Corporate Debt Securities          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Unrealized losses 2,300,000,000   2,300,000,000   2,700,000,000
Gross Unrealized Losses More Than 12 Months 1,600,000,000   1,600,000,000   2,000,000,000
Gross Unrealized Losses Less Than 12 Months $ 777,500,000   $ 777,500,000   $ 620,500,000