Restructuring, Impairment and Costs of Terminated Program, and Impairment of Goodwill - Restructuring Reserve Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Employee Severance
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 196	$ 3,299	$ 3,299
Expense recognized during the period	0	5,483
Payments during the period	(196)	(3,299)
Restructuring reserve, ending balance	0	5,483	196
Employee Severance | 2023 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	196	0	0
Expense recognized during the period	0	5,483	7,900
Payments during the period	(196)	0
Restructuring reserve, ending balance	0	5,483	196
Employee Severance | 2022 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0	3,299	3,299
Expense recognized during the period	0	0
Payments during the period	0	(3,299)
Restructuring reserve, ending balance	0	0	0
Contract Termination and Other Costs | 2022 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	5,542	7,710	7,710
Expense recognized during the period	975	878
Payments during the period	(928)	(1,095)
Restructuring reserve, ending balance	$ 5,589	$ 7,493	$ 5,542