Related Party Transactions - Expenses related to Related Party which were Settled in Cash (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Related Party Transaction [Line Items]
Research and development	[1]	$ 44,744	$ 24,660	$ 112,308	$ 55,822
Related Party
Related Party Transaction [Line Items]
Research and development		7,700	19,400	34,200	20,800
Paragon and License Agreement | Related Party
Related Party Transaction [Line Items]
Research and development		1,600	16,700	21,200	17,900
Paragon Agreement | Related Party
Related Party Transaction [Line Items]
Research and development		1,300	16,700	15,300	17,900
License Agreement | Related Party
Related Party Transaction [Line Items]
Research and development		$ 300	$ 0	$ 5,900	$ 0

[1] Includes $7.7 million and $34.2 million in related party expenses for the three and nine months ended September 30, 2024, respectively, and $19.4 million and $20.8 million related party expenses for the three and nine months ended September 30, 2023, respectively.