Collaboration Agreements And Business Development Activities - Collaboration Revenues under the Collaboration Agreement with Ipsen (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 03, 2026	Apr. 04, 2025
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ 610,812	$ 555,447
Collaborative Arrangement with Ipsen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	39,568	32,706
License revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	56,948	42,480
License revenues \| Collaborative Arrangement with Ipsen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	43,532	33,979
Collaboration services revenues
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	(1,113)	(316)
Collaboration services revenues \| Collaborative Arrangement with Ipsen
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total revenues	$ (3,964)	$ (1,273)

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details