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Restructuring, Impairment and Costs of Terminated Program, and Impairment of Goodwill - Summary of Restructuring Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 18 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Impairment of other property, plant and equipment | $ 13,300 | $ 57,321 | $ 26,455 | $ 57,321 |
Restructuring, impairment and costs of terminated program | 16,554 | 106,045 | 37,747 | 107,520 |
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 | 1,356 | 20,408 | 2,954 | 20,408 |
Severance and benefit expense | 0 | 27,750 | 0 | 27,750 |
Impairment of other property, plant and equipment | 13,255 | 57,321 | 13,255 | 57,321 |
Contract termination and other restructuring costs | 0 | 566 | 878 | 2,041 | $ 11,800
Restructuring, impairment and costs of terminated program | 14,611 | $ 106,045 | 17,087 | $ 107,520 |
2023 Restructuring Plan |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and benefit expense | 1,943 |  | 7,426 |  |
Impairment of other property, plant and equipment | 0 |  | 13,200 |  |
Contract termination and other restructuring costs | 0 |  | 34 |  |
Restructuring, impairment and costs of terminated program | $ 1,943 |  | $ 20,660 |  |

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