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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Fair Value Measurements [Abstract]      
Available-for-sale securities $ 1,983,725 $ 2,056,008  
1.75% Notes [Member]      
Fair Value Measurements [Abstract]      
Interest rate on convertible senior notes 1.75% 1.75% 1.75%
0% Notes [Member]      
Fair Value Measurements [Abstract]      
Interest rate on convertible senior notes 0.00% 0.00% 0.00%
Recurring Basis [Member] | Corporate Debt Securities [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities $ 1,058,068 [1] $ 1,032,066 [2]  
Recurring Basis [Member] | Corporate Debt Securities [Member] | Cash and Cash Equivalents [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities 39,900    
Recurring Basis [Member] | Debt Securities Issued by U.S. Government Agencies [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities [2] 150,590 208,998  
Recurring Basis [Member] | Debt Securities Issued by U.S. Government Agencies [Member] | Cash and Cash Equivalents [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities 6,000    
Recurring Basis [Member] | Debt Securities Issued by the U.S. Treasury [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities 768,085 [3] 806,724 [2]  
Recurring Basis [Member] | Debt Securities Issued by the U.S. Treasury [Member] | Cash and Cash Equivalents [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities 36,000    
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | 1.75% Notes [Member]      
Fair Value Measurements [Abstract]      
Convertible notes 794,500 569,300  
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | 0% Notes [Member]      
Fair Value Measurements [Abstract]      
Convertible notes 777,000 612,800  
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities 1,058,068 [1] 1,032,066 [2]  
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Debt Securities Issued by U.S. Government Agencies [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities [2] 150,590 208,998  
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Debt Securities Issued by the U.S. Treasury [Member]      
Fair Value Measurements [Abstract]      
Available-for-sale securities $ 0 [3] $ 0 [2]  
[1] $39.9 million was included in cash and cash equivalents, with the difference included in short-term investments.
[2] Included in short-term investments.
[3] $36.0 million was included in cash and cash equivalents, with the difference included in short-term investments.