Segment Information - Schedule of Operating Segment Reporting Information (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2023		Sep. 30, 2022		Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Total sales		$ 419.5		$ 364.7		$ 1,331.5	$ 1,148.3
Other operating (income) expense		(0.8)		0.4		(0.1)	(17.7)
Operating income (loss)		43.6		40.8		167.7	134.7
Depreciation and amortization		31.5		31.0		93.2	94.9
Stock-based compensation		2.6		2.4		18.3	15.2
Accrual basis additions to capital expenditures		18.2		20.8		88.7	49.1
Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	[1]	(16.4)		(16.1)		(55.7)	(52.4)
Corporate & Other and Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	[1]	(16.4)		(16.1)		(55.7)	(52.4)
Other operating (income) expense	[1]	0.0		0.0		0.0	19.4
Operating income (loss)		(6.3)	[1]	6.6	[1]	(38.4)	(22.2)	[1]
Depreciation and amortization		0.0	[1]	0.0	[1]	0.0	0.1	[1]
Stock-based compensation		1.3	[1]	1.1	[1]	11.7	9.4	[1]
Accrual basis additions to capital expenditures	[1]	0.0		0.1		0.0	0.0
Composite Materials
Segment Reporting Information [Line Items]
Total sales		340.5		293.5		1,097.2	925.4
Composite Materials | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales		16.2		15.4		54.0	50.4
Composite Materials | Operating Segments
Segment Reporting Information [Line Items]
Total sales		356.7		308.9		1,151.2	975.8
Other operating (income) expense		(0.8)		0.4		0.3	1.6
Operating income (loss)		43.7		41.4		181.1	131.2
Depreciation and amortization		27.8		27.5		82.5	84.2
Stock-based compensation		1.0		1.0		5.2	4.5
Accrual basis additions to capital expenditures		15.6		17.9		41.6	42.5
Engineered Products
Segment Reporting Information [Line Items]
Total sales		79.0		71.2		234.3	222.9
Engineered Products | Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales		0.2		0.7		1.7	2.0
Engineered Products | Operating Segments
Segment Reporting Information [Line Items]
Total sales		79.2		71.9		236.0	224.9
Other operating (income) expense		0.0		0.0		0.2	0.1
Operating income (loss)		6.2		6.0		25.0	25.7
Depreciation and amortization		3.7		3.5		10.7	10.6
Stock-based compensation		0.3		0.3		1.4	1.3
Accrual basis additions to capital expenditures		$ 2.6		$ 2.8		$ 47.1	$ 6.5

[1] We do not allocate corporate expenses to the operating segments.