Goodwill and Other Intangible Assets- Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, Impairment Loss			$ 104,580
Goodwill		$ 767,952	759,253	$ 883,109
Impaired asset write-downs		88	641	1,005
Clean Earth
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 104,600		104,580
Goodwill		379,299	379,299	483,879
Impaired asset write-downs		0	59	63
Harsco Environmental
Goodwill [Line Items]
Goodwill, Impairment Loss			0
Goodwill		388,653	379,954	399,230
Impaired asset write-downs		88	582	$ 942
Altek Group
Goodwill [Line Items]
Impaired asset write-downs		15,000
Asset Impairment Charges, Carrying Value		$ 14,200	$ 15,300