Sale of Future IMDELLTRA® Royalties - Schedule of Royalty Sale Liability Activity (Details) $ in Thousands	3 Months Ended
Mar. 31, 2026 USD ($)
Royalty Financing Obligation [Roll Forward]
Balance at December 31, 2025	$ 3,827,379
Balance at March 31, 2026	3,793,177
Royalty Payments
Royalty Financing Obligation [Roll Forward]
Balance at December 31, 2025	906,956
Debt portion of royalties recognized and settled to Royalty Pharma	(2,557)
Balance at March 31, 2026	$ 904,399

Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others.

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+ Details