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Financial Information by Segment - Schedule of Segment Reconciliation (Details) € in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2025 EUR (€) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Dec. 31, 2024 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales from external customers | $ 450,900,000 |  | $ 463,400,000 | $ 1,395,000,000 | $ 1,443,300,000 |
Cost of sales | 365,300,000 |  | 355,900,000 | 1,112,900,000 | 1,103,800,000 |
Selling, general and administrative expenses | 57,500,000 |  | 57,900,000 | 173,600,000 | 179,700,000 |
Loss (recovery) due to misappropriation of assets, net | (7,300,000) | € (6.3) | 60,700,000 | (6,500,000) | 60,700,000 |
Goodwill impairment | 80,800,000 |  | 0 | 80,800,000 | 0 |
Other segment items | 8,300,000 |  | 4,200,000 | 24,600,000 | 20,000,000.0 |
Equity in earnings of affiliated companies, net of tax | 500,000 |  | 200,000 | 1,600,000 | 500,000 |
LTIP and other non-operating charges | 3,700,000 |  | 3,700,000 | 10,000,000.0 | 10,200,000 |
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment | 33,700,000 |  | 30,800,000 | 97,200,000 | 90,000,000.0 |
Adjusted EBITDA | 57,700,000 |  | 80,100,000 | 192,700,000 | 240,500,000 |
Assets | 1,963,900,000 |  | 1,996,300,000 | 1,963,900,000 | 1,996,300,000 | $ 1,857,300,000
Capital expenditures | 40,900,000 |  | 47,900,000 | 112,300,000 | 135,700,000 |
Rubber |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Goodwill impairment |  |  |  | 32,300,000 |  |
Specialty |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Goodwill impairment |  |  |  | 48,500,000 |  |
Operating segments | Rubber |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales from external customers | 290,900,000 |  | 300,900,000 | 916,200,000 | 944,400,000 |
Cost of sales | 237,900,000 |  | 230,000,000.0 | 739,300,000 | 722,700,000 |
Selling, general and administrative expenses | 34,100,000 |  | 35,900,000 | 104,400,000 | 113,500,000 |
Loss (recovery) due to misappropriation of assets, net | 0 |  | 0 | 0 | 0 |
Goodwill impairment | 32,300,000 |  |  | 32,300,000 |  |
Other segment items | 4,200,000 |  | 2,200,000 | 12,100,000 | 9,700,000 |
Equity in earnings of affiliated companies, net of tax | 500,000 |  | 200,000 | 1,600,000 | 500,000 |
LTIP and other non-operating charges | 1,800,000 |  | 1,600,000 | 4,600,000 | 5,300,000 |
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment | 19,100,000 |  | 18,300,000 | 59,200,000 | 53,100,000 |
Adjusted EBITDA | 36,100,000 |  | 52,900,000 | 125,800,000 | 157,400,000 |
Assets | 1,109,900,000 |  | 1,101,500,000 | 1,109,900,000 | 1,101,500,000 |
Capital expenditures | 15,500,000 |  | 23,700,000 | 46,400,000 | 68,200,000 |
Operating segments | Specialty |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales from external customers | 160,000,000.0 |  | 162,500,000 | 478,800,000 | 498,900,000 |
Cost of sales | 127,400,000 |  | 125,900,000 | 373,600,000 | 381,100,000 |
Selling, general and administrative expenses | 23,200,000 |  | 21,700,000 | 68,400,000 | 65,500,000 |
Loss (recovery) due to misappropriation of assets, net | 0 |  | 0 | 0 | 0 |
Goodwill impairment | 48,500,000 |  |  | 48,500,000 |  |
Other segment items | 4,100,000 |  | 3,100,000 | 12,500,000 | 11,400,000 |
Equity in earnings of affiliated companies, net of tax | 0 |  | 0 | 0 | 0 |
LTIP and other non-operating charges | 1,700,000 |  | 2,900,000 | 4,600,000 | 5,300,000 |
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment | 14,600,000 |  | 12,500,000 | 38,000,000.0 | 36,900,000 |
Adjusted EBITDA | 21,600,000 |  | 27,200,000 | 66,900,000 | 83,100,000 |
Assets | 701,600,000 |  | 730,500,000 | 701,600,000 | 730,500,000 |
Capital expenditures | 25,400,000 |  | 24,200,000 | 65,900,000 | 67,500,000 |
Corporate |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales from external customers | 0 |  | 0 | 0 | 0 |
Cost of sales | 0 |  | 0 | 0 | 0 |
Selling, general and administrative expenses | 200,000 |  | 300,000 | 800,000 | 700,000 |
Loss (recovery) due to misappropriation of assets, net | (7,300,000) |  | 60,700,000 | (6,500,000) | 60,700,000 |
Goodwill impairment | 0 |  |  | 0 |  |
Other segment items | 0 |  | (1,100,000) | 0 | (1,100,000) |
Equity in earnings of affiliated companies, net of tax | 0 |  | 0 | 0 | 0 |
LTIP and other non-operating charges | 200,000 |  | (800,000) | 800,000 | (400,000) |
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment | 0 |  | 0 | 0 | 0 |
Adjusted EBITDA | 0 |  | 0 | 0 | 0 |
Assets | 152,400,000 |  | 164,300,000 | 152,400,000 | 164,300,000 |
Capital expenditures | $ 0 |  | $ 0 | $ 0 | $ 0 |

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