v3.25.3
Segment Information - Schedule of Operating Segment Reporting Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Segment Reporting Information [Line Items]        
Total sales $ 456.2 $ 456.5 $ 1,402.6 $ 1,429.2
Cost of sales 356.3 350.0 1,088.8 1,077.9
Gross margin 99.9 106.5 313.8 351.3
Selling, general and administrative expenses 41.1 39.8 127.4 128.7
Research and technology expenses 14.0 13.8 42.1 43.6
Other operating expense 8.8 0.4 34.1 1.8
Operating income (loss) 36.0 52.5 110.2 177.2
Depreciation and amortization 30.9 31.0 91.5 93.0
Stock-based compensation 1.0 2.9 13.4 19.3
Accrual basis additions to capital expenditures 18.1 18.5 49.9 59.6
Intersegment Elimination        
Segment Reporting Information [Line Items]        
Total sales 0.0 0.0 0.0 0.0
Composite Materials        
Segment Reporting Information [Line Items]        
Total sales 363.2 367.6 1,121.7 1,155.7
Composite Materials | Intersegment Elimination        
Segment Reporting Information [Line Items]        
Total sales 18.9 22.6 58.4 69.8
Composite Materials | Operating Segments        
Segment Reporting Information [Line Items]        
Total sales 382.1 390.2 1,180.1 1,225.5
Cost of sales 300.1 298.4 909.3 921.2
Gross margin 81.9 91.8 270.7 304.3
Selling, general and administrative expenses 27.1 23.8 78.9 72.4
Research and technology expenses 12.1 11.4 36.2 36.5
Other operating expense 2.8 0.2 2.8 1.0
Operating income (loss) 39.9 56.3 152.8 194.3
Depreciation and amortization 27.7 27.3 81.8 81.8
Stock-based compensation 0.6 0.8 4.5 5.0
Accrual basis additions to capital expenditures 16.7 16.0 45.3 51.3
Engineered Products        
Segment Reporting Information [Line Items]        
Total sales 93.0 88.9 280.9 273.5
Engineered Products | Intersegment Elimination        
Segment Reporting Information [Line Items]        
Total sales 1.4 0.1 2.1 1.0
Engineered Products | Operating Segments        
Segment Reporting Information [Line Items]        
Total sales 94.4 89.0 283.0 274.5
Cost of sales 75.2 72.2 236.6 218.2
Gross margin 19.3 16.8 46.5 56.3
Selling, general and administrative expenses 3.8 5.3 12.1 15.9
Research and technology expenses 1.0 1.3 3.1 3.7
Other operating expense 1.0 0.2 26.3 0.8
Operating income (loss) 13.6 10.0 5.1 35.9
Depreciation and amortization 3.2 3.7 9.7 11.2
Stock-based compensation 0.2 0.2 1.2 1.3
Accrual basis additions to capital expenditures 1.4 2.5 4.6 8.3
Corporate & Other and Intersegment Elimination        
Segment Reporting Information [Line Items]        
Total sales [1] 0.0 0.0 0.0 0.0
Corporate & Other and Intersegment Elimination | Intersegment Elimination        
Segment Reporting Information [Line Items]        
Total sales [1] (20.3) (22.7) (60.5) (70.8)
Corporate & Other and Intersegment Elimination | Operating Segments        
Segment Reporting Information [Line Items]        
Total sales [1] (20.3) (22.7) (60.5) (70.8)
Cost of sales [1] (19.0) (20.6) (57.1) (61.5)
Gross margin [1] (1.3) (2.1) (3.4) (9.3)
Selling, general and administrative expenses [1] 10.2 10.7 36.4 40.4
Research and technology expenses [1] 0.9 1.1 2.8 3.4
Other operating expense [1] 5.0 0.0 5.0 0.0
Operating income (loss) [1] (17.5) (13.8) (47.7) (53.0)
Depreciation and amortization [1] 0.0 0.0 0.0 0.0
Stock-based compensation [1] 0.2 1.9 7.7 13.0
Accrual basis additions to capital expenditures [1] $ 0.0 $ 0.0 $ 0.0 $ 0.0
[1] We do not allocate corporate expenses to the operating segments.