Collaboration and Licensing Agreements - Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Collaboration research and licensing agreements
Revenue recorded	$ 17,796	$ 59,164	$ 57,700	$ 123,649
Research collaboration
Collaboration research and licensing agreements
Revenue recorded	0	(1,300)	0	21,100
License
Collaboration research and licensing agreements
Revenue recorded	0	0	8,500	0
Milestone
Collaboration research and licensing agreements
Revenue recorded	0	46,000	500	61,000
Royalties
Collaboration research and licensing agreements
Revenue recorded	0	14,500	100	41,500
Non-cash royalties
Collaboration research and licensing agreements
Revenue recorded	17,800	0	48,600	0
Alexion
Collaboration research and licensing agreements
Revenue recorded	15,700	31,800	42,100	53,400
Gilead
Collaboration research and licensing agreements
Revenue recorded	0	6,000	0	6,000
Janssen
Collaboration research and licensing agreements
Revenue recorded	0	13,700	0	41,100
Mabgeek
Collaboration research and licensing agreements
Revenue recorded	0	0	1,500	0
Mabgeek | Technology License Agreement
Collaboration research and licensing agreements
Revenue recorded	0		1,500
MorphoSys/Incyte
Collaboration research and licensing agreements
Revenue recorded	2,100	2,700	6,500	6,600
Omeros
Collaboration research and licensing agreements
Revenue recorded	0	5,000	0	5,000
Vega | Technology License Agreement
Collaboration research and licensing agreements
Revenue recorded	0	0	500	0
Vir
Collaboration research and licensing agreements
Revenue recorded	0	0	100	1,500
Zenas
Collaboration research and licensing agreements
Revenue recorded	0	0	0	10,000
Third Party Licensee
Collaboration research and licensing agreements
Revenue recorded	$ 0	$ 0	$ 7,000	$ 0