Sale of Future IMDELLTRA® Royalties - Schedule of Royalty Sale Liability Activity (Details) $ in Thousands	6 Months Ended
Jun. 30, 2026 USD ($)
Royalty Financing Obligation [Roll Forward]
Balance at December 31, 2025	$ 3,827,379
Balance at June 30, 2026	4,001,617
Royalty Payments
Royalty Financing Obligation [Roll Forward]
Balance at December 31, 2025	906,956
Debt portion of royalties recognized and settled to Royalty Pharma	(2,556)
Accretion of liability	1,913
Balance at June 30, 2026	$ 906,313

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

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+ Details