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Collaboration Agreements And Business Development Activities - Collaboration Revenues under the Collaboration Agreement with Ipsen (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 28, 2024
Jun. 30, 2023
Jun. 28, 2024
Jun. 30, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues $ 637,178 $ 469,848 $ 1,062,404 $ 878,636
Collaborative Arrangement with Ipsen        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 190,559 36,731 226,262 70,265
License revenues        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 194,986 52,747 239,662 91,039
License revenues | Collaborative Arrangement with Ipsen        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 187,926 34,018 224,787 63,830
Collaboration services revenues        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 4,611 7,455 6,638 14,551
Collaboration services revenues | Collaborative Arrangement with Ipsen        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues $ 2,633 $ 2,713 $ 1,475 $ 6,435