Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Balance at the beginning of the period		$ 883,109	$ 889,048
Changes to goodwill			1,232
Goodwill, Impairment Loss		(104,580)
Foreign currency translation		(19,276)	(7,171)
Balance at the end of the period		759,253	883,109
Harsco Environmental
Goodwill [Roll Forward]
Balance at the beginning of the period		399,230	406,401
Changes to goodwill			0
Goodwill, Impairment Loss		0
Foreign currency translation		(19,276)	(7,171)
Balance at the end of the period		379,954	399,230
Clean Earth
Goodwill [Roll Forward]
Balance at the beginning of the period		483,879	482,647
Changes to goodwill			(1,232)
Goodwill, Impairment Loss	$ 104,600	(104,580)
Foreign currency translation		0	0
Balance at the end of the period		$ 379,299	$ 483,879