Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2025

Revenue from Contract with Customer [Abstract]

Summary of revenues by primary geographical markets

A summary of the Company's revenues by primary geographical markets as well as by key product and service groups is as follows:

	Three Months Ended
	March 31, 2025
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	55,226	$	235,231	$	36,976	$	327,433
Western Europe	97,644		—		27,224		124,868
Latin America (b)	32,124		—		1,800		33,924
Asia-Pacific	28,564		—		3,947		32,511
Middle East and Africa	25,349		—		—		25,349
Eastern Europe	4,199		—		—		4,199
Total Revenues	$	243,106	$	235,231	$	69,947	$	548,284
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	227,205	$	—	$	—	$	227,205
Ecoproducts	10,692		—		—		10,692
Environmental systems for aluminum dross and scrap processing	5,209		—		—		5,209
Railway track maintenance equipment	—		—		33,068		33,068
After-market parts and services; safety and diagnostic technology	—		—		22,915		22,915
Railway contracting services	—		—		13,964		13,964
Hazardous waste processing solutions	—		197,971		—		197,971
Soil and dredged materials processing and reuse solutions	—		37,260		—		37,260
Total Revenues	$	243,106	$	235,231	$	69,947	$	548,284

	Three Months Ended
	March 31, 2024
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	84,210	$	226,030	$	44,431	$	354,671
Western Europe	110,275		—		21,372		131,647
Latin America (b)	42,921		—		1,040		43,961
Asia-Pacific	28,915		—		8,325		37,240
Middle East and Africa	28,349		—		—		28,349
Eastern Europe	4,449		—		—		4,449
Total Revenues	$	299,119	$	226,030	$	75,168	$	600,317
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	258,128	$	—	$	—	$	258,128
Ecoproducts	36,264		—		—		36,264
Environmental systems for aluminum dross and scrap processing	4,727		—		—		4,727
Railway track maintenance equipment	—		—		29,918		29,918
After-market parts and services; safety and diagnostic technology	—		—		30,876		30,876
Railway contracting services	—		—		14,374		14,374
Hazardous waste processing solutions	—		191,910		—		191,910
Soil and dredged materials processing and reuse solutions	—		34,120		—		34,120
Total Revenues	$	299,119	$	226,030	$	75,168	$	600,317

(a)     Revenues are attributed to individual countries based on the location of the facility generating the revenue.

(b)     Includes Mexico.