Other Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net gains	$ (4,013)	$ (8,902)	$ (3,723)
Employee termination benefit costs	6,490	4,766	10,249
Costs to exit activities	1,446	663	533
Impaired asset write-downs	641	1,005	776
Contingent Consideration Adjustments	827	0	(2,386)
Other expense	1,000	(1,254)	(149)
Total	4,737	(3,722)	10,072
Corporate
Segment Reporting Information [Line Items]
Net gains	(632)	0	0
Employee termination benefit costs	(294)	1,481	27
Costs to exit activities	1,407	0	29
Contingent Consideration Adjustments	0	0	(2,274)
Clean Earth
Segment Reporting Information [Line Items]
Net gains	(1,512)	0	0
Employee termination benefit costs	1,786	433	833
Costs to exit activities	0	23	0
Impaired asset write-downs	59	63	0
Contingent Consideration Adjustments	(827)	0	(112)
Harsco Environmental
Segment Reporting Information [Line Items]
Net gains	(1,869)	(8,902)	(3,723)
Employee termination benefit costs	4,998	2,852	9,389
Costs to exit activities	39	640	504
Impaired asset write-downs	582	942	776
Contingent Consideration Adjustments	$ 0	$ 0	$ 0