Other Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net gains	$ (250)	$ (4,013)	$ (8,902)
Employee termination benefit costs	3,651	6,490	4,766
Costs to exit activities	(5,118)	1,446	663
Impaired asset write-downs	88	641	1,005
Contingent Consideration Adjustments	848	827	0
Other expense	(742)	1,000	(1,254)
Total	(3,219)	4,737	(3,722)
Net gain related to lease modification	(8,100)
Corporate
Segment Reporting Information [Line Items]
Net gains	0	(632)	0
Employee termination benefit costs	275	(294)	1,481
Costs to exit activities	2,692	1,407	0
Contingent Consideration Adjustments	(848)	0	0
Clean Earth
Segment Reporting Information [Line Items]
Net gains	0	(1,512)	0
Employee termination benefit costs	1,399	1,786	433
Costs to exit activities	0	0	23
Impaired asset write-downs	0	59	63
Contingent Consideration Adjustments	0	827	0
Harsco Environmental
Segment Reporting Information [Line Items]
Net gains	(250)	(1,869)	(8,902)
Employee termination benefit costs	1,977	4,998	2,852
Costs to exit activities	(7,810)	39	640
Impaired asset write-downs	$ 88	$ 582	$ 942