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FAIR VALUE MEASUREMENTS - Schedule of Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Fair value measurements            
Equity securities $ 11,352   $ 5,972      
Non-marketable securities 53,262   796      
Contingent consideration 284,113 $ 275,408 282,212 $ 283,231 $ 277,921 $ 288,657
Fair Value, Recurring            
Fair value measurements            
Restricted Cash, Fair Value Disclosure     5,747      
Equity securities 11,352   5,972      
Non-marketable securities 53,262   796      
Contingent consideration 284,113   282,212      
Total 772,244   762,357      
Fair Value, Recurring | Corporate bonds            
Fair value measurements            
Estimated Fair Value 104,255   206,874      
Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Estimated Fair Value 69,085   140,952      
Fair Value, Recurring | Asset backed securities            
Fair value measurements            
Estimated Fair Value 29,366   83,339      
Fair Value, Recurring | Cash and money market            
Fair value measurements            
Cash and cash equivalents, fair value 781,729   595,548      
Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Cash and cash equivalents, fair value 7,308   5,341      
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring            
Fair value measurements            
Restricted Cash, Fair Value Disclosure     5,747      
Equity securities 11,352   5,972      
Non-marketable securities 0   0      
Contingent consideration 0   0      
Total 793,081   607,267      
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Corporate bonds            
Fair value measurements            
Estimated Fair Value 0   0      
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Estimated Fair Value 0   0      
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Asset backed securities            
Fair value measurements            
Estimated Fair Value 0   0      
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | Cash and money market            
Fair value measurements            
Cash and cash equivalents, fair value 781,729   595,548      
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Cash and cash equivalents, fair value 0   0      
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring            
Fair value measurements            
Restricted Cash, Fair Value Disclosure     0      
Equity securities 0   0      
Non-marketable securities 0   0      
Contingent consideration 0   0      
Total 210,014   436,506      
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Corporate bonds            
Fair value measurements            
Estimated Fair Value 104,255   206,874      
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Estimated Fair Value 69,085   140,952      
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Asset backed securities            
Fair value measurements            
Estimated Fair Value 29,366   83,339      
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | Cash and money market            
Fair value measurements            
Cash and cash equivalents, fair value 0   0      
Significant Other Observable Inputs (Level 2) | Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Cash and cash equivalents, fair value 7,308   5,341      
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring            
Fair value measurements            
Restricted Cash, Fair Value Disclosure     0      
Equity securities 0   0      
Non-marketable securities 53,262   796      
Contingent consideration 284,113   282,212      
Total (230,851)   (281,416)      
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Corporate bonds            
Fair value measurements            
Estimated Fair Value 0   0      
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Estimated Fair Value 0   0      
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Asset backed securities            
Fair value measurements            
Estimated Fair Value 0   0      
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | Cash and money market            
Fair value measurements            
Cash and cash equivalents, fair value 0   0      
Significant Unobservable Inputs (Level 3) | Fair Value, Recurring | U.S. government agency securities            
Fair value measurements            
Cash and cash equivalents, fair value $ 0   $ 0