Revenue Recognition (Tables)

12 Months Ended

Dec. 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 for the years ended December 31, 2025, 2024 and 2023 is as follows:

	Year Ended December 31, 2025
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	228,691	$	973,853	$	141,527	$	1,344,071
Western Europe	401,709		—		81,779		483,488
Latin America (b)	148,619		—		2,925		151,544
Asia-Pacific	118,556		—		20,863		139,419
Middle East and Africa	102,808		—		—		102,808
Eastern Europe	19,028		—		—		19,028
Total Revenues	$	1,019,411	$	973,853	$	247,094	$	2,240,358
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing; and related logistical services	$	950,829	$	—	$	—	$	950,829
Ecoproducts	50,816		—		—		50,816
Environmental systems for aluminum dross and scrap processing	17,766		—		—		17,766
Railway track maintenance equipment	—		—		83,882		83,882
After market parts and services; safety and diagnostic technology	—		—		101,516		101,516
Railway contracting services	—		—		61,696		61,696
Hazardous waste processing solutions	—		824,244		—		824,244
Soil and dredged materials processing and reuse solutions	—		149,609		—		149,609
Total Revenues	$	1,019,411	$	973,853	$	247,094	$	2,240,358

	Year Ended December 31, 2024
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	292,274	$	940,337	$	173,424	$	1,406,035
Western Europe	425,775		—		84,398		510,173
Latin America (b)	154,684		—		5,578		160,262
Asia-Pacific	117,523		—		27,888		145,411
Middle East and Africa	103,957		—		—		103,957
Eastern Europe	17,299		—		—		17,299
Total Revenues	$	1,111,512	$	940,337	$	291,288	$	2,343,137
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing; and related logistical services	$	974,284	$	—	$	—	$	974,284
Ecoproducts	113,800		—		—		113,800
Environmental systems for aluminum dross and scrap processing	23,428		—		—		23,428
Railway track maintenance equipment	—		—		113,039		113,039
After market parts and services; safety and diagnostic technology	—		—		117,327		117,327
Railway contracting services	—		—		60,922		60,922
Hazardous waste processing solutions	—		778,894		—		778,894
Soil and dredged materials processing and reuse solutions	—		161,443		—		161,443
Total Revenues	$	1,111,512	$	940,337	$	291,288	$	2,343,137

	Year Ended December 31, 2023
(In thousands)	Harsco Environmental		Clean Earth		Harsco Rail		Consolidated Totals
Primary Geographical Markets (a):
North America	$	318,574	$	927,457	$	214,893	$	1,460,924
Western Europe	431,893		—		57,301		489,194
Latin America (b)	171,225		—		2,540		173,765
Asia-Pacific	113,800		—		22,061		135,861
Middle East and Africa	86,867		—		—		86,867
Eastern Europe	19,576		—		—		19,576
Total Revenues	$	1,141,935	$	927,457	$	296,795	$	2,366,187
Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing; and related logistical services	$	951,992	$	—	$	—	$	951,992
Ecoproducts	162,291		—		—		162,291
Environmental systems for aluminum dross and scrap processing	27,652		—		—		27,652
Railway track maintenance equipment	—		—		128,155		128,155
After market parts and services; safety and diagnostic technology	—		—		121,039		121,039
Railway contracting services	—		—		47,601		47,601
Hazardous waste processing solutions	—		766,474		—		766,474
Soil and dredged materials processing and reuse solutions	—		160,983		—		160,983
Total Revenues	$	1,141,935	$	927,457	$	296,795	$	2,366,187

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

(b)    Includes Mexico.

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The table below represents the expected fulfillment year of Company's fixed, unsatisfied performance obligations, where the expected contract duration exceeds one year, by segment, and exclude any variable fees, fixed fees subject to indexation and any performance obligations expected to be satisfied within one year:

(In thousands)	Harsco Environmental		Harsco Rail
2026	$	17,343	$	56,710
2027	15,986		39,083
2028	14,058		6,616
2029	4,866		3,375
2030	3,277		3,375
Thereafter	3,132		9,562
Total remaining performance obligations	$	58,662	$	118,721