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Fair Value Measurements (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Contingent earn-out obligations    
Fair Value Measurements    
Contingent earn-out obligations $ 36,446 $ 140,156
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)    
Balance at beginning of year 140,156 44,222
Issuances 719 51,784
Settlements (124,363) (43,996)
Adjustments to fair value 19,934 88,146
Balance at end of year 36,446 140,156
Recurring basis | Total    
Fair Value Measurements    
Cash and cash equivalents 860,523 549,939
U.S. Treasury bills 20,661  
Contingent earn-out obligations 36,446 140,156
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)    
Balance at beginning of year 140,156  
Balance at end of year 36,446 140,156
Recurring basis | Quoted Market Prices In Active Markets for Identical Assets (Level 1)    
Fair Value Measurements    
Cash and cash equivalents 860,523 549,939
Recurring basis | Significant Other Observable Inputs (Level 2)    
Fair Value Measurements    
U.S. Treasury bills 20,661  
Recurring basis | Significant Unobservable Inputs (Level 3)    
Fair Value Measurements    
Contingent earn-out obligations 36,446 140,156
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)    
Balance at beginning of year 140,156  
Balance at end of year $ 36,446 $ 140,156