Non-Cash Share-Based Compensation - Non-Cash Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Compensation
Share-based compensation expense		$ 71,963	$ 28,787	$ 193,556
Allocated from the Former Parent related to the Acceleration
Share-Based Compensation
Share-based compensation expense	$ 101,440
Research and development expenses
Share-Based Compensation
Share-based compensation expense		42,594	15,985	116,379
Research and development expenses | Allocated from the Former Parent excluding the Acceleration
Share-Based Compensation
Share-based compensation expense		0	0	46,976
Research and development expenses | Allocated from the Former Parent related to the Acceleration
Share-Based Compensation
Share-based compensation expense		0	0	61,749
Research and development expenses | 2022 Equity Incentive Plan
Share-Based Compensation
Share-based compensation expense		42,594	15,985	7,654
General and administrative expenses
Share-Based Compensation
Share-based compensation expense		29,369	12,802	77,177
General and administrative expenses | Allocated from the Former Parent excluding the Acceleration
Share-Based Compensation
Share-based compensation expense		0	0	30,951
General and administrative expenses | Allocated from the Former Parent related to the Acceleration
Share-Based Compensation
Share-based compensation expense		0	0	39,691
General and administrative expenses | 2022 Equity Incentive Plan
Share-Based Compensation
Share-based compensation expense		$ 29,369	$ 12,802	$ 6,535