Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 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
	June 30, 2025
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		Consolidated Totals
Primary Geographical Markets (a):
North America	$	57,613	$	246,282	$	30,618	$	334,513
Western Europe	105,304		—		22,822		128,126
Latin America (b)	35,546		—		633		36,179
Asia-Pacific	29,828		—		3,890		33,718
Middle East and Africa	24,757		—		—		24,757
Eastern Europe	4,961		—		—		4,961
Total Revenues	$	258,009	$	246,282	$	57,963	$	562,254
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	240,450	$	—	$	—	$	240,450
Ecoproducts	12,825		—		—		12,825
Environmental systems for aluminum dross and scrap processing	4,734		—		—		4,734
Railway track maintenance equipment	—		—		15,652		15,652
After market parts and services; safety and diagnostic technology	—		—		24,356		24,356
Railway contracting services	—		—		17,955		17,955
Hazardous waste processing solutions	—		211,206		—		211,206
Soil and dredged materials processing and reuse solutions	—		35,076		—		35,076
Total Revenues	$	258,009	$	246,282	$	57,963	$	562,254

	Three Months Ended
	June 30, 2024
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		Consolidated Totals
Primary Geographical Markets (a):
North America	$	84,027	$	236,105	$	53,044	$	373,176
Western Europe	109,620		—		18,652		128,272
Latin America (b)	41,280		—		1,918		43,198
Asia-Pacific	28,345		—		7,345		35,690
Middle East and Africa	25,182		—		—		25,182
Eastern Europe	4,475		—		—		4,475
Total Revenues	$	292,929	$	236,105	$	80,959	$	609,993

	Three Months Ended
	June 30, 2024
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		Consolidated Totals
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	253,685	$	—	$	—	$	253,685
Ecoproducts	34,263		—		—		34,263
Environmental systems for aluminum dross and scrap processing	4,981		—		—		4,981
Railway track maintenance equipment	—		—		30,517		30,517
After market parts and services; safety and diagnostic technology	—		—		35,131		35,131
Railway contracting services	—		—		15,311		15,311
Hazardous waste processing solutions	—		194,874		—		194,874
Soil and dredged materials processing and reuse solutions	—		41,231		—		41,231
Total Revenues	$	292,929	$	236,105	$	80,959	$	609,993

	Six Months Ended
	June 30, 2025
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	112,839	$	481,513	$	67,594	$	661,946
Western Europe	202,948		—		50,046		252,994
Latin America (b)	67,670		—		2,433		70,103
Asia-Pacific	58,392		—		7,837		66,229
Middle East and Africa	50,106		—		—		50,106
Eastern Europe	9,160		—		—		9,160
Total Revenues	$	501,115	$	481,513	$	127,910	$	1,110,538
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	467,655	$	—	$	—	$	467,655
Ecoproducts	23,517		—		—		23,517
Environmental systems for aluminum dross and scrap processing	9,943		—		—		9,943
Railway track maintenance equipment	—		—		48,720		48,720
After-market parts and services; safety and diagnostic technology	—		—		47,271		47,271
Railway contracting services	—		—		31,919		31,919
Hazardous waste processing solutions	—		409,177		—		409,177
Soil and dredged materials processing and reuse solutions	—		72,336		—		72,336
Total Revenues	$	501,115	$	481,513	$	127,910	$	1,110,538

	Six Months Ended
	June 30, 2024
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	168,237	$	462,135	$	97,475	$	727,847
Western Europe	219,895		—		40,024		259,919
Latin America (b)	84,201		—		2,958		87,159
Asia-Pacific	57,260		—		15,670		72,930
Middle East and Africa	53,531		—		—		53,531
Eastern Europe	8,924		—		—		8,924
Total Revenues	$	592,048	$	462,135	$	156,127	$	1,210,310
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	511,813	$	—	$	—	$	511,813
Ecoproducts	70,527		—		—		70,527
Environmental systems for aluminum dross and scrap processing	9,708		—		—		9,708
Railway track maintenance equipment	—		—		60,436		60,436
After-market parts and services; safety and diagnostic technology	—		—		66,007		66,007
Railway contracting services	—		—		29,684		29,684
Hazardous waste processing solutions	—		386,784		—		386,784
Soil and dredged materials processing and reuse solutions	—		75,351		—		75,351
Total Revenues	$	592,048	$	462,135	$	156,127	$	1,210,310

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

(b)     Includes Mexico.