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Restructuring (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
Restructuring (Details) - USD ($) $ in Thousands	Nov. 07, 2024	Feb. 29, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated (as a percent)		25.00%
Restructuring			$ 0	$ 0	$ 1,647	$ 7,755
Payments for restructuring				$ 0
November Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses					1,600
Restructuring			$ 100		11,600
Payments for restructuring					16,400		$ 4,800
February Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses						7,800
Payments for restructuring						7,100
Employee Severance \| Strategic Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated (as a percent)	45.00%
Employee Severance \| November Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses					300
Employee Severance \| February Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses						6,100
Contract Termination \| November Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses					100
Contract Termination \| February Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses						1,100
Other Restructuring \| November Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses					$ 1,200
Other Restructuring \| February Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring expenses						$ 600