Financial Information by Segment - Schedule of Segment Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Segment Reporting [Line Items]
Net sales from external customers	$ 500.9	$ 466.4	$ 960.4	$ 944.1
Cost of sales	407.9	368.0	788.2	747.6
Selling, general and administrative expenses	62.7	57.7	121.8	116.1
Other segment items	9.0	8.6	17.7	17.1
Equity in earnings of affiliated companies, net of tax	0.2	0.6	0.3	1.1
LTIP and other non-operating charges	3.8	4.1	5.7	7.1
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment	32.9	32.0	65.6	63.5
Adjusted EBITDA	58.2	68.8	104.3	135.0
Assets	1,987.0	2,024.9	1,987.0	2,024.9	$ 1,907.6
Capital expenditures	25.4	42.2	61.5	71.4
Operating segments | Rubber
Segment Reporting [Line Items]
Net sales from external customers	316.1	308.3	605.9	625.3
Cost of sales	277.4	242.5	531.2	501.4
Selling, general and administrative expenses	36.3	34.2	70.1	70.3
Other segment items	4.2	3.3	8.0	7.9
Equity in earnings of affiliated companies, net of tax	0.2	0.6	0.3	1.1
LTIP and other non-operating charges	1.3	1.0	1.9	2.8
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment	19.5	19.0	39.4	40.1
Adjusted EBITDA	19.2	48.9	38.2	89.7
Assets	1,145.6	1,130.3	1,145.6	1,130.3
Capital expenditures	4.6	16.8	20.4	30.9
Operating segments | Specialty
Segment Reporting [Line Items]
Net sales from external customers	184.8	158.1	354.5	318.8
Cost of sales	130.5	125.5	257.0	246.2
Selling, general and administrative expenses	26.3	23.2	51.2	45.2
Other segment items	3.9	4.8	8.4	8.4
Equity in earnings of affiliated companies, net of tax	0.0	0.0	0.0	0.0
LTIP and other non-operating charges	1.5	2.3	2.0	2.9
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment	13.4	13.0	26.2	23.4
Adjusted EBITDA	39.0	19.9	66.1	45.3
Assets	703.0	765.5	703.0	765.5
Capital expenditures	20.8	25.4	41.1	40.5
Corporate
Segment Reporting [Line Items]
Net sales from external customers	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	0.1	0.3	0.5	0.6
Other segment items	0.9	0.5	1.3	0.8
Equity in earnings of affiliated companies, net of tax	0.0	0.0	0.0	0.0
LTIP and other non-operating charges	1.0	0.8	1.8	1.4
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment	0.0	0.0	0.0	0.0
Adjusted EBITDA	0.0	0.0	0.0	0.0
Assets	138.4	129.1	138.4	129.1
Capital expenditures	$ 0.0	$ 0.0	$ 0.0	$ 0.0