v3.26.1
Fair Value Measurements - Assets Measured at Fair Value on a Recurring Basis (Details) - Recurring [Member] - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value Measurements [Abstract]    
Cash equivalents [1] $ 155,741 $ 213,579
Total 1,987,875 2,569,519
Corporate Debt Securities [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities 986,465 [2] 1,184,608 [3]
Corporate Debt Securities [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue    
Fair Value Measurements [Abstract]    
Available-for-sale securities 57,600 47,800
Debt Securities Issued by U.S. Government Agencies [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities [4] 145,272 148,631
Debt Securities Issued by the U.S. Treasury [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities 646,877 [5] 1,012,746 [4]
Debt Securities Issued by the U.S. Treasury [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue    
Fair Value Measurements [Abstract]    
Available-for-sale securities 21,000  
Debt Securities Issued by States of the U.S. and Political Subdivisions of the States [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities [4] 5,752 6,943
Publicly Traded Equity Securities [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent    
Fair Value Measurements [Abstract]    
Equity securities [6] 47,768 3,012
Quoted Prices in Active Markets (Level 1) [Member]    
Fair Value Measurements [Abstract]    
Cash equivalents [1] 155,741 213,579
Total 850,386 1,229,337
Quoted Prices in Active Markets (Level 1) [Member] | Corporate Debt Securities [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities 0 [2] 0 [3]
Quoted Prices in Active Markets (Level 1) [Member] | Debt Securities Issued by U.S. Government Agencies [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities [4] 0 0
Quoted Prices in Active Markets (Level 1) [Member] | Debt Securities Issued by the U.S. Treasury [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities 646,877 [5] 1,012,746 [4]
Quoted Prices in Active Markets (Level 1) [Member] | Debt Securities Issued by States of the U.S. and Political Subdivisions of the States [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities [4] 0 0
Quoted Prices in Active Markets (Level 1) [Member] | Publicly Traded Equity Securities [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent    
Fair Value Measurements [Abstract]    
Equity securities [6] 47,768 3,012
Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Measurements [Abstract]    
Cash equivalents [1] 0 0
Total 1,137,489 1,340,182
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities 986,465 [2] 1,184,608 [3]
Significant Other Observable Inputs (Level 2) [Member] | Debt Securities Issued by U.S. Government Agencies [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities [4] 145,272 148,631
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 [5] 0 [4]
Significant Other Observable Inputs (Level 2) [Member] | Debt Securities Issued by States of the U.S. and Political Subdivisions of the States [Member]    
Fair Value Measurements [Abstract]    
Available-for-sale securities [4] 5,752 6,943
Significant Other Observable Inputs (Level 2) [Member] | Publicly Traded Equity Securities [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent    
Fair Value Measurements [Abstract]    
Equity securities [6] $ 0 $ 0
[1] Included in cash and cash equivalents.
[2] $57.6 million was included in cash and cash equivalents, with the difference included in short-term investments.
[3] $47.8 million was included in cash and cash equivalents, with the difference included in short-term investments.
[4] Included in short-term investments.
[5] $21.0 million was included in cash and cash equivalents, with the difference included in short-term investments.
[6] Included in other current assets.