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Debt and Other Obligations - Narrative (Details) emissions_certificate in Thousands | Sep. 29, 2025 EUR (€) emissions_certificate | Sep. 16, 2025 EUR (€) emissions_certificate | Mar. 19, 2025 EUR (€) emissions_certificate | Sep. 30, 2025 USD ($) | Sep. 30, 2025 EUR (€) | Dec. 31, 2024 USD ($)
--- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |
Number of emission allowance certificates sold | emissions_certificate | 21 | 320 | 145 |  |  |
Proceeds from sale of emissions certificate | € | € 1,600,000 | € 24,600,000 | € 10,500,000 |  |  |
Emissions certificates, repurchase obligation amount | € | € 1,600,000 | € 24,800,000 | € 10,800,000 |  |  |
Accrued interest |  |  |  | $ 43,200,000 | € 36,800,000 |
Revolving Credit Facility | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Increase in borrowing capacity | € |  |  |  |  | 50,000,000 |
Maximum borrowing capacity |  |  |  | 410,900,000 | € 350,000,000 |
Debt issuance costs, gross | $ |  |  |  | 4,700,000 |  |
Remaining borrowing capacity | $ |  |  |  | 165,800,000 |  | $ 127,500,000
Outstanding | $ |  |  |  | $ 58,700,000 |  | $ 0
Revolving Credit Facility | Revolving Credit Facility | On or before December 31, 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Leverage ratio margin |  |  |  | 500.00% | 500.00% |
Revolving Credit Facility | Revolving Credit Facility | After December 31, 2026 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Leverage ratio margin |  |  |  | 450.00% | 450.00% |

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