v3.26.1
Business Segment Information - Schedule of Depreciation and Amortization Expense and Capital Expenditures (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Depreciation and amortization expense $ 39.9 $ 28.6 $ 84.8 $ 57.4
Capital expenditures 15.9 12.6 32.9 17.5
Operating Segments        
Segment Reporting [Line Items]        
Depreciation and amortization expense 39.3 28.1 83.6 56.3
Capital expenditures 15.3 12.5 31.8 17.3
Operating Segments | Domestic Coke        
Segment Reporting [Line Items]        
Depreciation and amortization expense 22.0 24.9 46.2 50.0
Capital expenditures 7.9 4.5 15.1 6.6
Operating Segments | Industrial Services        
Segment Reporting [Line Items]        
Depreciation and amortization expense 17.3 3.2 37.4 6.3
Capital expenditures 7.4 8.0 16.7 10.7
Corporate and Other        
Segment Reporting [Line Items]        
Depreciation and amortization expense 0.6 0.5 1.2 1.1
Capital expenditures $ 0.6 $ 0.1 $ 1.1 $ 0.2