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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 9 Months Ended
Sep. 29, 2023
Sep. 30, 2022
Sep. 29, 2023
Sep. 30, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues $ 471,920 $ 411,738 $ 1,350,556 $ 1,187,145
Collaborative Arrangement with Ipsen        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 36,021 34,818 106,286 131,585
License revenues        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 42,367 34,384 133,406 123,977
License revenues | Collaborative Arrangement with Ipsen        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 34,777 27,607 98,607 103,389
Collaboration services revenues        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues 3,056 10,872 17,607 39,344
Collaboration services revenues | Collaborative Arrangement with Ipsen        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Total revenues $ 1,244 $ 7,211 $ 7,679 $ 28,196