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Condensed Consolidated Statements of Income (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenues    
Total revenues $ 264,861 $ 195,879
Operating expenses    
Cost of sales 48,403 28,329
Amortization of intangibles 17,762 17,763
Research and development 14,799 19,111
Selling, general and administrative 42,362 35,134
Total operating expenses 123,326 100,337
Operating income 141,535 95,542
Other income (expense)    
Investment and other income, net 6,818 4,993
Interest expense (4,525) (4,507)
Income before income tax expense 143,828 96,028
Income tax expense 25,733 19,205
Net income $ 118,095 $ 76,823
Earnings per share    
Basic (usd per share) $ 0.96 $ 0.61
Diluted (usd per share) $ 0.93 $ 0.60
Weighted average common shares outstanding    
Basic (in shares) 123,215 126,941
Diluted (in shares) 126,644 128,887
Royalties    
Revenues    
Total revenues $ 168,192 $ 120,593
Product sales, net    
Revenues    
Total revenues 78,041 58,583
Revenues under collaborative agreements    
Revenues    
Total revenues $ 18,628 $ 16,703