Restructuring, Impairment and Costs of Terminated Program, and Impairment of Goodwill - Summary of Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended		15 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023
Restructuring Cost and Reserve [Line Items]
Impairment of other property, plant and equipment	$ 13,200	$ 0
Restructuring, impairment and costs of terminated program	21,193	1,475
2023 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Severance and benefit expense	5,483
Impairment of other property, plant and equipment	13,200
Contract termination and other restructuring costs	34
Restructuring, impairment and costs of terminated program	18,717
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program	1,598	0
Contract termination and other restructuring costs	878	1,475	$ 11,800
Restructuring, impairment and costs of terminated program	$ 2,476	$ 1,475