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Restructuring Charges (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) Rate
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  |  | $ 25,484 | $ 8,655 | $ 65,388
Q1 2025 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Severance Costs |  | $ 11,300 |  |  |  |  |
Q1 2024 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Severance Costs |  |  | $ 9,800 |  |  |  |
Q1 2023 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring charges |  |  |  | $ 8,700 |  |  |
Q3 2023 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Severance Costs |  |  |  |  |  |  | $ 53,200
Number of employees affected |  |  |  |  |  |  | 620
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent | Rate |  |  |  |  |  |  | 9.00%
Other Restructuring Costs |  |  |  |  |  |  | $ 3,500
Restructuring charges |  |  |  |  |  |  | 56,700
Payments for Restructuring |  |  |  |  |  |  | 49,700
Restructuring Reserve |  |  |  |  |  |  | $ 3,500
Q4 2025 Restructuring Plan |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Severance Costs | $ 14,300 |  |  |  |  |  |
Payments for Restructuring | 5,500 |  |  |  |  |  |
Restructuring Reserve | $ 8,800 |  |  |  | $ 8,800 |  |

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