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Discontinued Operations and Dispositions - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 29, 2024
Apr. 01, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Business Acquisition [Line Items]            
Net gains     $ 8,601 $ 0 $ 10,478 $ 0
Performix Metallurgical Additives, LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations            
Business Acquisition [Line Items]            
Proceeds from sale of business, gross of adjustments   $ 17,500        
Net gains   1,800        
Gain on sale of business, net of tax   $ 1,300        
Reed Minerals, LLC | Disposal Group, Disposed of by Sale, Not Discontinued Operations            
Business Acquisition [Line Items]            
Proceeds from sale of business, gross of adjustments $ 45,000          
Net gains 8,700          
Gain on sale of business, net of tax 2,800          
Accounts receivable 9,900          
Inventory 7,100          
PPE 10,700          
Goodwill 13,700          
Accounts payable $ 6,900          
Harsco Rail Segment            
Business Acquisition [Line Items]            
Reduction in carrying amount of assets     $ 10,700   $ 10,700