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Collaborative, Licensing and Other Arrangements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Collaborative Arrangement and Arrangement Other than Collaborative
Accounts payable	$ 423,546		$ 479,035
Amgen, Inc \| Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative
Collaborative arrangement, inventory purchases	123,691	$ 62,744
Amgen, Inc \| Collaborative Arrangement \| Related Party
Collaborative Arrangement and Arrangement Other than Collaborative
Accounts payable	$ 135,273		$ 79,097