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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues from continuing operations:
Total revenues	$ 600,317	$ 560,705
Costs and expenses from continuing operations:
Selling, general and administrative expenses	87,126	81,861
Research and development expenses	861	520
Remeasurement of long-lived assets	10,695	0
Other expense (income), net	(2,440)	(5,648)
Total costs and expenses	574,504	528,790
Operating income (loss) from continuing operations	25,813	31,915
Interest income	1,697	1,480
Interest expense	(28,122)	(24,995)
Facility fees and debt-related income (expense)	(2,789)	(2,363)
Defined benefit pension income (expense)	(4,176)	(5,329)
Income (loss) from continuing operations before income taxes and equity income	(7,577)	708
Income tax benefit (expense) from continuing operations	(7,915)	(8,017)
Equity income (loss) of unconsolidated entities, net	(249)	(133)
Income (loss) from continuing operations	(15,741)	(7,442)
Discontinued operations:
Income (loss) from discontinued businesses	(1,492)	(1,655)
Income tax benefit (expense) from discontinued businesses	387	507
Income (loss) from discontinued operations, net of tax	(1,105)	(1,148)
Net income (loss)	(16,846)	(8,590)
Less: Net loss (income) attributable to noncontrolling interests	(1,116)	(935)
Net income (loss) attributable to Enviri Corporation	(17,962)	(9,525)
Amounts attributable to Enviri Corporation common stockholders:
Income (loss) from continuing operations, net of tax	(16,857)	(8,377)
Income (loss) from discontinued operations, net of tax	(1,105)	(1,148)
Net income (loss) attributable to Enviri Corporation	$ (17,962)	$ (9,525)
Weighted-average shares of common stock outstanding (in shares)	79,945	79,633
Basic earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.21)	$ (0.11)
Discontinued operations (in dollars per share)	(0.01)	(0.01)
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.22)	$ (0.12)
Diluted weighted-average shares of common stock outstanding (in shares)	79,945	79,633
Diluted earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.21)	$ (0.11)
Discontinued operations (in dollars per share)	(0.01)	(0.01)
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.22)	$ (0.12)
Product Revenues
Revenues from continuing operations:
Total revenues	$ 101,163	$ 99,145
Costs and expenses from continuing operations:
Cost of services and products sold	85,410	82,549
Service Revenues
Revenues from continuing operations:
Total revenues	499,154	461,560
Costs and expenses from continuing operations:
Cost of services and products sold	$ 392,852	$ 369,508

Property, Plant and Equipment

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment ("PP&E") consist of the following:


(In thousands)	March 31 2024		December 31 2023
Land and improvements	$	92,269	$	93,793

Buildings and improvements	239,651		243,472
Machinery and equipment	1,690,555		1,729,637
Uncompleted construction	66,436		66,241
Gross property, plant and equipment	2,088,911		2,133,143
Less: Accumulated depreciation	(1,400,273)		(1,425,746)
Property, plant and equipment, net	$	688,638	$	707,397

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Income tax benefit (expense) from continuing operations	$ 7,915	$ 8,017
Unrecognized tax benefits	3,400
Unrecognized income tax benefit that will be recognized within the next twelve months	$ 600

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense from continuing operations for the three months ended March 31, 2024 and 2023 was $7.9 million and $8.0 million, respectively. The decrease in expense for the three months ended March 31, 2024, compared with the three months ended March 31, 2023, is primarily due to a decrease in disallowed interest expense and business improvement in various countries with no tax expense. For the three months ended March 31, 2024, the Company calculated its quarterly tax provision based on its best estimate of the full year tax rate applicable to the quarter. For the three months ended March 31, 2023, due to the insignificant amount of pre-tax book loss relative to the size of permanent book-tax differences and a varying net income (loss) pattern projected for the year, the Company’s tax provision estimate was determined using an actual year-to-date method. The reserve for uncertain tax positions on March 31, 2024 and December 31, 2023 was $3.4 million, including interest and penalties. Within the next twelve months, it is reasonably possible that $0.6 million in unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Derivative Instruments, Hedging Activities and Fair Value - Fair Value of Outstanding Derivative Contracts (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Derivative contracts
Asset derivatives	$ 6,746	$ 3,117
Liability derivatives	992	10,775
Foreign currency exchange forward contracts \| Other current assets
Derivative contracts
Asset derivatives	4,544	1,674
Foreign currency exchange forward contracts \| Other current liabilities
Derivative contracts
Liability derivatives	782	8,625
Interest rate swaps \| Other current assets
Derivative contracts
Asset derivatives	2,202	1,443
Interest rate swaps \| Other liabilities
Derivative contracts
Liability derivatives	210	2,150
Fair Value of Derivatives Designated as Hedging Instruments
Derivative contracts
Asset derivatives	2,303	1,520
Liability derivatives	598	2,711
Fair Value of Derivatives Designated as Hedging Instruments \| Foreign currency exchange forward contracts \| Other current assets
Derivative contracts
Asset derivatives	101	77
Fair Value of Derivatives Designated as Hedging Instruments \| Foreign currency exchange forward contracts \| Other current liabilities
Derivative contracts
Liability derivatives	388	561
Fair Value of Derivatives Designated as Hedging Instruments \| Interest rate swaps \| Other current assets
Derivative contracts
Asset derivatives	2,202	1,443
Fair Value of Derivatives Designated as Hedging Instruments \| Interest rate swaps \| Other liabilities
Derivative contracts
Liability derivatives	210	2,150
Fair Value of Derivatives Not Designated as Hedging Instruments
Derivative contracts
Asset derivatives	4,443	1,597
Liability derivatives	394	8,064
Fair Value of Derivatives Not Designated as Hedging Instruments \| Foreign currency exchange forward contracts \| Other current assets
Derivative contracts
Asset derivatives	4,443	1,597
Fair Value of Derivatives Not Designated as Hedging Instruments \| Foreign currency exchange forward contracts \| Other current liabilities
Derivative contracts
Liability derivatives	394	8,064
Fair Value of Derivatives Not Designated as Hedging Instruments \| Interest rate swaps \| Other current assets
Derivative contracts
Asset derivatives	0	0
Fair Value of Derivatives Not Designated as Hedging Instruments \| Interest rate swaps \| Other liabilities
Derivative contracts
Liability derivatives	$ 0	$ 0

Debt and Credit Agreements - Schedule of Facility Fees and Debt-Related Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Facility Fees and Debt-Related Income [Line Items]
Facility fees and debt-related income (expense)	$ (2,789)	$ (2,363)
Facility Fees and Debt-Related Income (Expense)
Schedule of Facility Fees and Debt-Related Income [Line Items]
Unused Debt Commitment And Amendment Fees	0	(12)
Securitization And Factoring Fees	$ (2,789)	$ (2,351)

Commitments and Contingencies (Details) € in Thousands			1 Months Ended		3 Months Ended		12 Months Ended
Commitments and Contingencies (Details) € in Thousands	Apr. 26, 2024 USD ($)	Jun. 04, 2018 USD ($)	Dec. 31, 2018 USD ($)	Aug. 31, 2005 USD ($)	Mar. 31, 2024 USD ($) claim case	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2024 BRL (R$) claim	Feb. 25, 2022 EUR (€)	Oct. 14, 2021 EUR (€)	Dec. 30, 2020 USD ($)	Jan. 27, 2020 party
Commitments and Contingencies
Number Of Potentially Related Parties \| party												20
Reserve for loss contingencies					$ 5,100,000
Penalties					6,000,000			R$ 32,000,000
Current Portion of Environmental Liabilities					7,395,000		$ 7,540,000
Environmental liabilities					25,253,000		25,682,000
Total environmental liabilities					32,648,000		33,222,000
Proposed civil penalty					800,000
Accrued payment for environmental loss					700,000		$ 700,000
Malpractice Insurance, Deductible					5,000,000
Net income (loss)					(16,846,000)	$ (8,590,000)
Sao Paulo State Revenue Authority \| Subsequent Event
Commitments and Contingencies
Loss contingency reserves	$ 3,800,000
Net income (loss)	$ 0
BRAZIL
Commitments and Contingencies
Loss Contingencies, Unpaid Service Taxes											$ 2,100,000
Loss Contingencies, Overall Liability					5,800,000
Loss Contingency Accrual, Provision					0
Brazilian Tax Disputes - Jan 2004 through May 2005 \| Sao Paulo State Revenue Authority
Commitments and Contingencies
Damages sought - interest, penalties and fees					18,600,000
Damages sought - principal					$ 1,200,000
Loss contingency, reduced penalty		$ 1,200,000
Amount of damages sought		$ 8,100,000
Brazilian Tax Disputes - Jan 2002 through Dec 2003 \| Sao Paulo State Revenue Authority
Commitments and Contingencies
Damages sought - interest, penalties and fees				$ 3,800,000
Damages sought - principal				1,200,000
Loss contingency, reduced penalty			$ 600,000
Amount of damages sought				$ 5,000,000
Loss contingency, reduced penalty, including interest			$ 5,600,000
Other
Commitments and Contingencies
Number of pending claims \| claim					17,000			17,000
Number of claims dismissed to date by stipulation or summary judgment prior to trial \| case					28,400
Loss Contingency Accrual, Provision					$ 0
Alleged Violation of Environmental Permit in Ijmuiden, Netherland \| Amsterdam Public Prosecutor’s Office
Commitments and Contingencies
Loss Contingency, Amount Seeking From Other Party \| €										€ 100
Loss Contingency, Fine Issued By Court \| €									€ 5

Derivative Instruments, Hedging Activities and Fair Value - Effect of Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Effect of derivative instruments
Gain (Loss) Recognized in OCI on Derivatives	$ 3,804	$ (3,569)
Loss (Gain) Reclassified from AOCI into Income - Effective Portion or Equity	(1,286)	163
Foreign currency exchange forward contracts
Effect of derivative instruments
Gain (Loss) Recognized in OCI on Derivatives	223	(682)
Foreign currency exchange forward contracts \| Income (Loss) from Discontinued Businesses
Effect of derivative instruments
Loss (Gain) Reclassified from AOCI into Income - Effective Portion or Equity	(404)	411
Interest rate swaps
Effect of derivative instruments
Gain (Loss) Recognized in OCI on Derivatives	3,581	(2,887)
Interest rate swaps \| Interest Expense
Effect of derivative instruments
Loss (Gain) Reclassified from AOCI into Income - Effective Portion or Equity	$ (882)	$ (248)

Discontinued Operations and Dispositions (Tables)

3 Months Ended

Mar. 31, 2024

Discontinued Operations and Disposal Groups [Abstract]

Balance sheet positions and financial information included in net income from discontinued operations and statements of cash flows

The reclassification of the Rail business's balance sheet positions as of December 31, 2023 had the following impacts on the Condensed Consolidated Balance Sheets and are summarized as follows:


(in thousands)	December 31 2023
Trade accounts receivable, net	$	57,415
Other receivables	6,708
Inventories	103,077
Current portion of contract assets	56,341
Prepaid expenses	28,797
Other current assets	2,895
Property, plant and equipment, net	44,113
Right-of-use assets, net	7,050
Goodwill	13,026
Intangible assets, net	3,122
Deferred income tax assets	973

Other assets	22,792
Total assets	$	346,309

Accounts payable	$	44,703
Accrued compensation	6,056
Income taxes payable	1,434
Current portion of operating lease liabilities	3,656
Current portion of advances on contracts	32,912
Reserve for forward losses on contracts	52,725
Other current liabilities	30,550

Operating lease liabilities	3,331
Deferred tax liabilities	350
Other liabilities	494
Total liabilities	$	176,211

The reclassification of the results of the Rail business to continuing operations had the following impacts on the Consolidated Statement of Operations for the three months ended March 31, 2023:


	Three Months Ended
	March 31
(In thousands)		2023
Service revenues		$	7,720
Product revenues		57,332
Total revenues		65,052
Cost of services sold		5,626
Cost of products sold		45,743
Total cost of sales		51,369
Selling, general and administrative expenses		9,926
Research and development expenses		344
Other expense (income)		503
Total costs and expenses		62,142
Operating income from continuing operations		2,910
Interest income		25
Interest expense		(667)
Defined benefit pension income		6
Income (loss) from continuing operations before income taxes		2,274
Income tax benefit (expense) from continuing operations		(1,094)
Income (loss) from continuing operations		$	1,180

- Definition

Tabular disclosure of information related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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+ Details

Commitments and Contingencies - Schedule of Loss Contingencies by Contingency (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Current Portion of Environmental Liabilities	$ 7,395,000	$ 7,540,000
Long-term environmental liabilities	25,253,000	25,682,000
Total environmental liabilities	$ 32,648,000	$ 33,222,000

Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Schedule of net benefit costs



	Three Months Ended
	March 31
Defined Benefit Pension Plan Net Periodic Pension Cost (Benefit)	U.S. Plans				International Plans
(In thousands)	2024		2023		2024		2023
Service costs	$	—	$	—	$	338	$	313
Interest costs	2,419		2,543		7,460		7,429
Expected return on plan assets	(2,236)		(1,750)		(8,370)		(7,678)
Recognized prior service costs	—		—		118		114
Recognized actuarial losses	1,045		1,151		3,801		3,519

Defined benefit pension plan net periodic pension cost (benefit)	$	1,228	$	1,944	$	3,347	$	3,697

Leases (Tables)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Components of lease expense

The components of lease expense were as follows:


	Three Months Ended
	March 31
(In thousands)		2024		2023
Finance leases:
Depreciation expense		$	2,578	$	1,541
Interest on lease liabilities		815		354
Operating leases		9,832		9,478
Variable and short-term lease expense		14,044		12,630
Sublease income		(2)		(2)
Total lease expense		$	27,267	$	24,001

Other (Income) Expenses, Net (Tables)

3 Months Ended

Mar. 31, 2024

Other Income and Expenses [Abstract]

Schedule of other (income) expenses

The major components of this Condensed Consolidated Statements of Operations caption were as follows:


	Three Months Ended
	March 31
(In thousands)	2024		2023

Employee termination benefit costs	$	382	$	(26)

Other costs (income) for exit activities (a)	548		(5,728)






Net gains on sale of assets	(3,370)		(230)
Other	—		336
Other (income) expenses, net	$	(2,440)	$	(5,648)

(a) The three months ended March 31, 2023 includes a $6.8 million net gain recognized related to a lease modification that resulted in lease incentive for the Company to relocate an HE site prior to the end of the expected lease term.

Employee Benefit Plans

3 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Employee Benefit Plans



	Three Months Ended
	March 31
Defined Benefit Pension Plan Net Periodic Pension Cost (Benefit)	U.S. Plans				International Plans
(In thousands)	2024		2023		2024		2023
Service costs	$	—	$	—	$	338	$	313
Interest costs	2,419		2,543		7,460		7,429
Expected return on plan assets	(2,236)		(1,750)		(8,370)		(7,678)
Recognized prior service costs	—		—		118		114
Recognized actuarial losses	1,045		1,151		3,801		3,519

Defined benefit pension plan net periodic pension cost (benefit)	$	1,228	$	1,944	$	3,347	$	3,697

Cash contributions to U.S. and international defined benefit pension plans totaled $0.4 million and $4.3 million for the three months ended March 31, 2024, respectively. The Company's estimate of expected cash contributions to be paid during the remainder of 2024 for the U.S. and international defined benefit pension plans is $7.3 million and $13.2 million, respectively.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
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+ Details

Derivative Instruments, Hedging Activities and Fair Value - Derivatives Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative [Line Items]
Total revenues	$ 600,317	$ 560,705
Interest expense	(28,122)	(24,995)
Gain or (loss) reclassified from AOCI into income	1,286	(163)
Product Revenues
Derivative [Line Items]
Total revenues	101,163	99,145
Fair Value of Derivatives Designated as Hedging Instruments
Derivative [Line Items]
Interest expense	(28,122)	(24,995)
Interest Expense \| Interest rate swaps
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	882	248
Interest Expense \| Foreign exchange contracts
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	0	0
Product Revenues \| Interest rate swaps
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	0	0
Product Revenues \| Foreign exchange contracts
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	$ 404	$ (411)

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (16,846)	$ (8,590)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes	(16,535)	12,446
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes	1,863	(2,560)
Pension liability adjustments, net of deferred income taxes	7,011	(2,735)
Unrealized gain (loss) on marketable securities, net of deferred income taxes	2	1
Total other comprehensive income (loss)	(7,659)	7,152
Total comprehensive income (loss)	(24,505)	(1,438)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(295)	(1,293)
Comprehensive income (loss) attributable to Enviri Corporation	$ (24,800)	$ (2,731)

Components of Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of accumulated other comprehensive loss

The components of AOCI, net of the effect of income taxes, and activity for the three months ended March 31, 2023 and 2024 were as follows:


	Components of AOCI, Net of Tax
(In thousands)	Cumulative Foreign Exchange Translation Adjustments			Effective Portion of Derivatives Designated as Hedging Instruments			Cumulative Unrecognized Actuarial Losses on Pension Obligations			Unrealized Gain (Loss) on Marketable Securities		Total
Balance at December 31, 2022	$	(213,104)		$	157		$	(354,699)		$	10	$	(567,636)

OCI before reclassifications	12,446		(a)	(2,684)		(b)	(7,227)		(a)	1		2,536
Amounts reclassified from AOCI, net of tax	—			124			4,492			—		4,616



Total OCI	12,446			(2,560)			(2,735)			1		7,152
Less: OCI attributable to noncontrolling interests	(358)			—			—			—		(358)
OCI attributable to Enviri Corporation	12,088			(2,560)			(2,735)			1		6,794
Balance at March 31, 2023	$	(201,016)		$	(2,403)		$	(357,434)		$	11	$	(560,842)


	Components of AOCI, Net of Tax
(In thousands)	Cumulative Foreign Exchange Translation Adjustments			Effective Portion of Derivatives Designated as Hedging Instruments			Cumulative Unrecognized Actuarial Losses on Pension Obligations			Unrealized Gain (Loss) on Marketable Securities		Total
Balance at December 31, 2023	$	(183,499)		$	(470)		$	(355,740)		$	15	$	(539,694)

OCI before reclassifications	(16,535)		(a)	2,865		(b)	2,310		(a)	2		(11,358)
Amounts reclassified from AOCI, net of tax	—			(1,002)			4,701			—		3,699



Total OCI	(16,535)			1,863			7,011			2		(7,659)
Less: OCI attributable to noncontrolling interests	821			—			—			—		821
OCI attributable to Enviri Corporation	(15,714)			1,863			7,011			2		(6,838)
Balance at March 31, 2024	$	(199,213)		$	1,393		$	(348,729)		$	17	$	(546,532)

(a) Principally foreign currency fluctuation.

(b) Net change from periodic revaluations.

Reclassification out of accumulated other comprehensive income

Amounts reclassified from AOCI were as follows:


(In thousands)	Three Months Ended			Location on the Condensed Consolidated Statements of Operations
	March 31
		2024				2023



Amortization of cash flow hedging instruments:
Foreign currency exchange forward contracts		$	(404)	$	411	Product revenues



Interest rate swaps		(882)		(248)		Interest expense

Total before taxes		(1,286)		163
Income taxes		284		(39)
Total reclassification of cash flow hedging instruments, net of tax		$	(1,002)	$	124

Amortization of defined benefit pension items (c):
Actuarial losses		$	4,846	$	4,670	Defined benefit pension income (expense)
Prior service costs		118		114		Defined benefit pension income (expense)



Total before taxes		4,964		4,784
Income taxes		(263)		(292)
Total reclassification of defined benefit pension items, net of tax		$	4,701	$	4,492

(c) These AOCI components are included in the computation of net periodic pension costs. See Note 10, Employee Benefit Plans, for additional details.

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Finance leases:
Depreciation expense	$ 2,578	$ 1,541
Interest on lease liabilities	815	354
Operating leases	9,832	9,478
Variable and short-term lease expense	14,044	12,630
Sublease income	(2)	(2)
Total lease expense	$ 27,267	$ 24,001

Leases

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Leases

The components of lease expense were as follows:


	Three Months Ended
	March 31
(In thousands)		2024		2023
Finance leases:
Depreciation expense		$	2,578	$	1,541
Interest on lease liabilities		815		354
Operating leases		9,832		9,478
Variable and short-term lease expense		14,044		12,630
Sublease income		(2)		(2)
Total lease expense		$	27,267	$	24,001

Leases

The components of lease expense were as follows:


	Three Months Ended
	March 31
(In thousands)		2024		2023
Finance leases:
Depreciation expense		$	2,578	$	1,541
Interest on lease liabilities		815		354
Operating leases		9,832		9,478
Variable and short-term lease expense		14,044		12,630
Sublease income		(2)		(2)
Total lease expense		$	27,267	$	24,001

Derivative Instruments, Hedging Activities and Fair Value (Tables)

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of fair value of outstanding derivative contracts

The fair value of outstanding derivative contracts recorded as assets and liabilities on the Company's Condensed Consolidated Balance Sheets was as follows:


(In thousands)	Balance Sheet Location	Fair Value of Derivatives Designated as Hedging Instruments		Fair Value of Derivatives Not Designated as Hedging Instruments		Total Fair Value
March 31, 2024
Asset derivatives (Level 2):
Foreign currency exchange forward contracts	Other current assets	$	101	$	4,443	$	4,544
Interest rate swaps	Other current assets	2,202		—		2,202

Total		$	2,303	$	4,443	$	6,746

Liability derivatives (Level 2):
Foreign currency exchange forward contracts	Other current liabilities	$	388	$	394	$	782

Interest rate swaps	Other liabilities	210		—		210
Total		$	598	$	394	$	992

December 31, 2023
Asset derivatives (Level 2):
Foreign currency exchange forward contracts	Other current assets	$	77	$	1,597	$	1,674


Interest rate swaps	Other current assets	1,443		—		1,443

Total		$	1,520	$	1,597	$	3,117

Liability derivatives (Level 2):
Foreign currency exchange forward contracts	Other current liabilities	$	561	$	8,064	$	8,625

Interest rate swaps	Other liabilities	2,150		—		2,150
Total		$	2,711	$	8,064	$	10,775

Schedule of effect of derivative instruments

The effect of derivative instruments on the Company's Condensed Consolidated Statements of Comprehensive Income (Loss) was as follows:

Derivatives Designated as Hedging


	Gain (Loss) Recognized in OCI on Derivatives				Loss (Gain) Reclassified from AOCI into Income - Effective Portion or Equity
	Three Months Ended				Three Months Ended
	March 31				March 31
(In thousands)	2024		2023		2024		2023
Foreign currency exchange forward contracts	$	223	$	(682)	$	(404)	$	411


Interest rate swaps	3,581		(2,887)		(882)		(248)

	$	3,804	$	(3,569)	$	(1,286)	$	163

The location and amount of gain (loss) recognized on the Company's Condensed Consolidated Statements of Operations was as follows:


	Three Months Ended
	March 31
	2024				2023
(In thousands)	Product Revenues		Interest Expense			Product Revenues		Interest Expense
Total amounts in the Condensed Consolidated Statement of Operations in which the effects of derivatives designated as hedging instruments are recorded	$	101,163	$	(28,122)		$	99,145	$	(24,995)
Interest rate swaps:
Gain or (loss) reclassified from AOCI into income	—		882			—		248

Foreign exchange contracts:
Gain or (loss) reclassified from AOCI into income	404		—			(411)		—

Derivatives Not Designated as Hedging Instruments



	Location of Gain (Loss) Recognized in Income on Derivatives (a)	Three Months Ended
		March 31
(In thousands)			2024		2023

Foreign currency exchange forward contracts	Cost of services and products sold		$	9,914	$	(3,297)

(a) These gains (losses) offset other amounts recognized in cost of services and products sold principally as a result of intercompany or third party foreign currency exposures.

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Issued	Common Stock Treasury	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance at Dec. 31, 2022	$ 623,042	$ 145,448	$ (848,570)	$ 225,759	$ 1,614,441	$ (567,636)	$ 53,600
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(8,590)				(9,525)		935
Total other comprehensive income	7,152					6,794	358
Sale of subsidiary shares to noncontrolling interest	0			398			(398)
Vesting of restricted stock units and other stock grants, net	(1,108)	395	(1,108)	(395)
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,456			3,456
Ending balance at Mar. 31, 2023	623,952	145,843	(849,678)	229,218	1,604,916	(560,842)	54,495
Beginning balance at Dec. 31, 2023	575,408	146,105	(849,996)	238,416	1,528,320	(539,694)	52,257
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(16,846)				(17,962)		1,116
Noncontrolling interests	(8,243)						(8,243)
Total other comprehensive income	(7,659)					(6,838)	(821)
Contributions from noncontrolling interests	874						874
Vesting of restricted stock units and other stock grants, net	(1,270)	443	(1,270)	(443)
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,860			3,860
Ending balance at Mar. 31, 2024	$ 546,124	$ 146,548	$ (851,266)	$ 241,833	$ 1,510,358	$ (546,532)	$ 45,183

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

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+ Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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+ Details

- Definition

Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

+ References

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+ Details

Accounts Receivable and Note Receivable - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2023	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Jan. 31, 2020	Jan. 01, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable			$ 322,102	$ 353,709
Trade accounts receivable, net			308,213	338,187
Accounts receivable under factoring arrangement, program capacity			32,000	32,600
Note receivable, face value						$ 40,000
Note receivable, interest rate						2.50%
Accounts receivable past due by twelve months or more			9,300
Greater than 12 months
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable			14,700
Harsco Industrial IKG \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Selling price							$ 85,000
Accounts Receivable Under Factoring Arrangement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable, net			14,700	16,100
PNC
Accounts, Notes, Loans and Financing Receivable [Line Items]
AR facility term	3 years
Accounts receivable securitization, maximum purchase commitment					$ 150,000
Total outstanding trade receivables sold and derecognized			150,000
Accounts receivable from securitization			$ 71,600	$ 82,200
Additional proceeds		$ 5,000

Derivative Instruments, Hedging Activities and Fair Value

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments, Hedging Activities and Fair Value

Derivative Instruments and Hedging Activities

The Company uses derivative instruments, including foreign currency exchange forward contracts and interest rate swaps to manage certain foreign currency and interest rate exposures. Derivative instruments are viewed as risk management tools by the Company and are not used for trading or speculative purposes. All derivative instruments are recorded on the Company's Condensed Consolidated Balance Sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the earnings effect of the hedged forecasted transactions in a cash flow hedge. The Company may enter into derivative contracts that are intended to economically hedge certain of its risks, even though hedge accounting does not apply or the Company elects not to apply hedge accounting.

The Company primarily applies the market approach for recurring fair value measurements and endeavors to utilize the best available information. Accordingly, the Company utilizes valuation techniques that maximize the use of observable inputs, such as forward rates, interest rates, the Company’s credit risk and counterparties’ credit risks, and which minimize the use of unobservable inputs. The Company is able to classify fair value balances based on the ability to observe those inputs. Foreign currency exchange forward contracts and interest rate swaps are based upon pricing models using market-based inputs (Level 2). Model inputs can be verified and valuation techniques do not involve significant management judgment.

The fair value of outstanding derivative contracts recorded as assets and liabilities on the Company's Condensed Consolidated Balance Sheets was as follows:


(In thousands)	Balance Sheet Location	Fair Value of Derivatives Designated as Hedging Instruments		Fair Value of Derivatives Not Designated as Hedging Instruments		Total Fair Value
March 31, 2024
Asset derivatives (Level 2):
Foreign currency exchange forward contracts	Other current assets	$	101	$	4,443	$	4,544
Interest rate swaps	Other current assets	2,202		—		2,202

Total		$	2,303	$	4,443	$	6,746

Liability derivatives (Level 2):
Foreign currency exchange forward contracts	Other current liabilities	$	388	$	394	$	782

Interest rate swaps	Other liabilities	210		—		210
Total		$	598	$	394	$	992

December 31, 2023
Asset derivatives (Level 2):
Foreign currency exchange forward contracts	Other current assets	$	77	$	1,597	$	1,674


Interest rate swaps	Other current assets	1,443		—		1,443

Total		$	1,520	$	1,597	$	3,117

Liability derivatives (Level 2):
Foreign currency exchange forward contracts	Other current liabilities	$	561	$	8,064	$	8,625

Interest rate swaps	Other liabilities	2,150		—		2,150
Total		$	2,711	$	8,064	$	10,775

All of the Company's derivatives are recorded on the Condensed Consolidated Balance Sheets at gross amounts and do not offset. All of the Company's interest rate swaps and certain foreign currency exchange forward contracts are transacted under ISDA documentation. Each ISDA master agreement permits the net settlement of amounts owed in the event of default. The Company's derivative assets and liabilities subject to enforceable master netting arrangements, if offset, would have resulted in a net asset of $0.8 million and a net liability of $0.5 million at March 31, 2024 and December 31, 2023, respectively.

The effect of derivative instruments on the Company's Condensed Consolidated Statements of Comprehensive Income (Loss) was as follows:

Derivatives Designated as Hedging


	Gain (Loss) Recognized in OCI on Derivatives				Loss (Gain) Reclassified from AOCI into Income - Effective Portion or Equity
	Three Months Ended				Three Months Ended
	March 31				March 31
(In thousands)	2024		2023		2024		2023
Foreign currency exchange forward contracts	$	223	$	(682)	$	(404)	$	411


Interest rate swaps	3,581		(2,887)		(882)		(248)

	$	3,804	$	(3,569)	$	(1,286)	$	163

The location and amount of gain (loss) recognized on the Company's Condensed Consolidated Statements of Operations was as follows:


	Three Months Ended
	March 31
	2024				2023
(In thousands)	Product Revenues		Interest Expense			Product Revenues		Interest Expense
Total amounts in the Condensed Consolidated Statement of Operations in which the effects of derivatives designated as hedging instruments are recorded	$	101,163	$	(28,122)		$	99,145	$	(24,995)
Interest rate swaps:
Gain or (loss) reclassified from AOCI into income	—		882			—		248

Foreign exchange contracts:
Gain or (loss) reclassified from AOCI into income	404		—			(411)		—

Derivatives Not Designated as Hedging Instruments



	Location of Gain (Loss) Recognized in Income on Derivatives (a)	Three Months Ended
		March 31
(In thousands)			2024		2023

Foreign currency exchange forward contracts	Cost of services and products sold		$	9,914	$	(3,297)

(a) These gains (losses) offset other amounts recognized in cost of services and products sold principally as a result of intercompany or third party foreign currency exposures.

Foreign Currency Exchange Forward Contracts

The Company conducts business in multiple currencies and, accordingly, is subject to the inherent risks associated with foreign exchange rate movements. Foreign currency-denominated assets and liabilities are translated into U.S. dollars at the exchange rates existing at the respective consolidated balance sheet dates, and income and expense items are translated at the average exchange rates during the respective periods.

The Company uses derivative instruments to hedge cash flows related to foreign currency fluctuations. Foreign currency exchange forward contracts outstanding are part of a worldwide program to minimize foreign currency exchange operating income and balance sheet exposure by offsetting foreign currency exposures of certain future payments between the Company and various subsidiaries, suppliers or customers. The unsecured contracts are with major financial institutions. The Company may be exposed to credit loss in the event of non-performance by the contract counterparties. The Company evaluates the creditworthiness of the counterparties and does not expect default by them. Foreign currency exchange forward contracts are used to hedge commitments, such as foreign currency debt, firm purchase commitments and foreign currency cash flows for certain export sales transactions.

Changes in the fair value of derivatives used to hedge foreign currency denominated balance sheet items are reported directly in earnings, along with offsetting transaction gains and losses on the items being hedged. Derivatives used to hedge forecasted cash flows associated with foreign currency commitments may be accounted for as cash flow hedges, as deemed appropriate, if the criteria for hedge accounting are met. Gains and losses on derivatives designated as cash flow hedges are deferred in AOCI, a separate component of equity, and reclassified to earnings in a manner that matches the timing of the earnings impact of the hedged transactions. The ineffective portion of all hedges, if any, is recognized currently in earnings.

The recognized gains and losses offset amounts recognized in cost of services and products sold principally as a result of intercompany or third-party foreign currency exposures. At March 31, 2024 and December 31, 2023, the notional amounts of foreign currency exchange forward contracts were $648.5 million and $633.3 million, respectively. These contracts are primarily denominated in British Pound Sterling and Euros and mature through 2025.

In addition to foreign currency exchange forward contracts, the Company designates certain loans as hedges of net investments in international subsidiaries. The Company recorded pre-tax net gains $0.8 million and $0.3 million for the three months ended March 31, 2024 and March 31, 2023, respectively, in OCI.

Interest Rate Swaps

The Company uses interest rate swaps in conjunction with certain variable rate debt issuances in order to secure a fixed interest rate. Changes in the fair value attributed to the effect of the swaps’ interest spread and changes in the credit worthiness of the counter-parties are recorded in OCI and are reclassified into income as interest payments are made.

In the first quarter of 2023, the Company entered into a series of interest rate swaps with a scheduled maturity of December 2025. The swaps have the effect of converting $300.0 million of the New Term Loan from a floating interest rate to a fixed interest rate and are classified as cash flow hedges. The fixed rates provided by these swaps, ranging from 4.16% to 4.21%, replace the adjusted SOFR rate in the interest calculation.

Fair Value of Other Financial Instruments

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued liabilities and short-term borrowings approximate fair value due to the short-term maturities of these assets and liabilities. At March 31, 2024 and December 31, 2023, the total fair value of long-term debt and current maturities, excluding deferred financing costs, was $1,436.9 million and $1,394.5 million, respectively, compared with a carrying value of $1,472.1 million and $1,429.0 million, respectively. Fair values for debt are based on pricing models using market-based inputs (Level 2) for similar issues or on the current rates offered to the Company for debt of the same remaining maturities.

Inventories (Tables)

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consist of the following:


(In thousands)	March 31 2024		December 31 2023
Finished goods	$	16,430	$	16,171
Work-in-process	10,715		13,081

Raw materials and purchased parts	116,073		114,046
Stores and supplies	47,070		46,071
Total inventories	$	190,288	$	189,369

Revenue Recognition - Narrative (Details) - USD ($)	3 Months Ended
Revenue Recognition - Narrative (Details) - USD ($)	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total contract assets	$ 95,800,000		$ 86,900,000
Total advances on contracts	36,200,000		$ 38,600,000
Revenue recognized	$ 10,700,000	$ 11,600,000
Network Rail
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage complete	43.00%
Deutsche Bahn
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage complete	88.00%
SBB, Network Rail, and Deutsche Bahn
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Provisions recognized	$ 0	$ 0
Contract \| SBB
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Percentage complete	59.00%
Harsco Environmental Segment
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 82,200,000
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	21,800,000
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	20,500,000
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	15,000,000
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	12,400,000
Harsco Rail Segment
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	140,700,000
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	53,400,000
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	61,000,000
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	22,600,000
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 3,700,000

Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Environmental

The Company is involved in a number of environmental remediation investigations and cleanups and, along with other companies, has been identified as a “potentially responsible party” for certain byproduct disposal sites. While each of these matters is subject to various uncertainties, it is probable that the Company will agree to make payments toward funding certain of these activities, and it is possible that some of these matters will be decided unfavorably to the Company. The Company has evaluated its potential liability and its financial exposure is dependent upon such factors as the continuing evolution of environmental laws and regulatory requirements, the availability and application of technology, the allocation of cost among potentially responsible parties, the years of remedial activity required and the remediation methods selected.

The Company evaluates its liability for future environmental remediation costs on a quarterly basis. Although actual costs to be incurred at identified sites in future periods may vary from the estimates (given inherent uncertainties in evaluating environmental exposures), the Company does not expect that any costs that are reasonably possible to be incurred by the Company in connection with environmental matters in excess of the amounts accrued would have a material adverse effect on the Company's financial condition, results of operations or cash flows.

The following table summarizes information related to the location and undiscounted amount of the Company's environmental liabilities:


(In thousands)	March 31 2024		December 31 2023
Current portion of environmental liabilities (a)	$	7,395	$	7,540
Long-term environmental liabilities	25,253		25,682
Total environmental liabilities	$	32,648	$	33,222

(a) The current portion of environmental liabilities is included in the caption Other current liabilities on the Condensed Consolidated Balance Sheets.

Legal Proceedings

In the ordinary course of business, the Company is a defendant or party to various claims and lawsuits, including those discussed below. Unless stated otherwise below, the Company has not determined a loss to be probable or estimable for the legal proceedings.

In November 2022, the EPA and the Kentucky Department for Environmental Protection (the “KDEP”) conducted an inspection of Clean Earth of Calvert City LLC’s facility in Calvert City, KY. In September 2023, the EPA verbally proposed a civil penalty of $0.8 million to address alleged violations identified at the time of the inspection. The Company recorded a liability during the year ended December 31,2023 of $0.7 million. At March 31, 2024, the liability is $0.7 million and the Company is still assessing the alleged violations and is engaging with the EPA to resolve this matter.

On January 27, 2020, the EPA issued a Notice of Potential Liability to the Company, along with several other companies, concerning the Newtown Creek Superfund Site located in Kings and Queens Counties in New York. The Notice alleges certain facilities formerly owned or operated by subsidiaries of the Company may have resulted in the discharge of hazardous substances into Newtown Creek or its Dutch Kills tributary. The site has been subject to CERCLA response activities since approximately 2011. The EPA expects to issue a Record of Decision for the sitewide cleanup plan no sooner than 2028 and announced, in July 2021, that it would defer its decision on a potential early action response for the lower two miles of the Creek until the sitewide studies are completed. The Company is one of approximately twenty (20) Potentially Responsible Parties ("PRPs") that have received notices, though it is believed other PRPs may exist. The Company vigorously contests the allegations of the Notice and currently does not believe that this matter will have a material effect on the Company’s financial position or results from operations.

On June 25 and 26, 2018, the DTSC conducted a compliance enforcement inspection of ESOL’s facility in Rancho Cordova, California, which was then owned by Stericycle, Inc. On February 14, 2020, the DTSC filed an action in the Superior Court for the State of California, Sacramento Division, alleging violations of California’s Hazardous Waste Control Law and the facility’s hazardous waste permit arising from the inspection. On August 27, 2020, the DTSC issued a Notice of Denial of Hazardous Waste Facility Permit Application, denying the renewal of the facility's hazardous waste permit. The Company has exhausted its legal challenges to the denial of the Hazardous Waste facility permit, and the hazardous waste facility is in the process of closing. The Company continues to utilize the site for non-hazardous waste and is evaluating additional potential alternate uses for the site. The DTSC investigation and compliance issues leading to the compliance tier assignment were ongoing well before the Company's acquisition of the ESOL business, and the Company was aware of the investigation and many of the issues raised in the investigation at the time of the purchase. Accordingly, the Company is indemnified for certain fines and other costs and expenses associated with this matter by Stericycle, Inc. The Company has not accrued any amounts in respect of these alleged violations and cannot estimate the reasonably possible loss or the range of reasonably possible losses that it may incur.

The Company has had ongoing meetings with the SCE over processing salt cakes, a processing byproduct, stored at the Al Hafeerah site. The Company’s Bahrain operations that produced the salt cakes has ceased operations. An Environmental Impact Assessment and Technical Feasibility Study for facilities to process the salt cakes was approved by the SCE during the first quarter of 2018. Commissioning of the facilities was completed during the third quarter of 2021 and the processing of the salt cakes has commenced. The Company's current reserve of $5.1 million at March 31, 2024 continues to represent the Company's best estimate of the ultimate costs to be incurred to resolve this matter. The Company continues to evaluate this reserve and any future change in estimated costs which could be material to the Company’s results of operations in any one period.

On July 27, 2018, Brazil’s Federal and Rio de Janeiro State Public Prosecution Offices (the "MPF" and "MPE", respectively) filed a Civil Public Action against CSN, one of the Company's customers, the Company’s Brazilian subsidiary, the Municipality of Volta Redonda, Brazil, and the Instituto Estadual do Ambiente (local environmental protection agency) seeking the implementation of various measures to limit and reduce the accumulation of customer-owned slag at the site in Brazil. On August 6, 2018, the 3rd Federal Court in Volta Redonda (the "Volta Redonda Court") granted the MPF and MPE an injunction against the same parties requiring, among other things, CSN and the Company’s Brazilian subsidiary to limit the volume of slag sent to the site. Because the customer owns the site and the slag located on the site, the Company believes that complying with this injunction is the steel producer’s responsibility. Nevertheless, the Volta Redonda Court issued two orders fining the Company and CSN for what it views as ongoing violations of the injunction. The Company is appealing the fines and the underlying injunction. Both the Company and CSN continue to have discussions with the MPF, MPE and the governmental authorities regarding the injunction and the possible resolution of the underlying case. Beginning on March 25, 2022, the Courts entered a series of orders suspending the litigation proceedings and staying any additional fines and interest accruals while the parties discuss a possible resolution to the matter. The aggregate amount of fines levied against the Company, exclusive of interest, is approximately 32 million Brazilian reais (or approximately $6 million) as of March 31, 2024. The Company does not believe that a loss relating to this matter is probable or estimable at this point.

On October 19, 2018, local environmental authorities issued an enforcement action against the Company concerning the Company’s operations at a customer site in Ijmuiden, Netherlands. The enforcement action alleged violations of the Company’s environmental permit at the site, which restricts the release of any visible dust emissions. On January 12, 2022, the Administrative Supreme Court of the Netherlands upheld the Company’s challenge of these enforcement actions as they relate to the slag tipping area of the site. As a result, all fines asserted against the Company to date have been invalidated and all fines paid to date have been reimbursed. This order is not appealable. On or about October 14, 2021, the Company received a subpoena and two indictments before the Amsterdam District Court in the Netherlands. The Amsterdam Public Prosecutor’s Office ("APPO") issued two indictments against the Company, alleging violations in connection with dust releases and/or events alleged to have occurred in 2018 through May 2020 at the site. The action cites provisions which permit fines for the alleged infractions and seeks €0.1 million in fines with a smaller amount held in abeyance. On February 2, 2022, the APPO announced that it would further investigate residents’ claims related to this matter. On February 25, 2022, the Amsterdam District Court ruled that the Company was liable for only one alleged violation and that this alleged violation was unintentional. The court issued a fine of €5,000, to be held in abeyance. Both the Company and the APPO have appealed this ruling. The Company is vigorously contesting all allegations against it and is also working with its customer to ensure the control of emissions. The Company has contractual indemnity rights from its customer that it believes will substantially cover any fines or penalties.

DEA Investigation

Prior to the Company’s acquisition of ESOL, Stericycle, Inc. notified the Company that the DEA had served an administrative subpoena on Stericycle, Inc. and executed a search warrant at a facility in Rancho Cordova, CA and an administrative inspection warrant at a facility in Indianapolis, IN. The Company has determined that the DEA and the DTSC have launched investigations involving, at least in part, the ESOL business of collecting, transporting, and destroying controlled substances from retail customers that transferred from Stericycle, Inc. to the Company. The Company is cooperating with these inquiries, which relate primarily to the period before the Company owned the ESOL business. Since the acquisition of the ESOL business, the Company has performed a vigorous review of ESOL’s compliance program related to controlled substances and has made material changes to the manner in which controlled substances are transported from retail customers to DEA-registered facilities for destruction. Pursuant to an agreement with Stericycle, the Company has contractual recourse for any material loss the Company has determined is reasonably possible. The Company has not accrued any amounts in respect of these investigations and does not believe a loss is reasonably possible.

Brazilian Tax Disputes

The Company is involved in a number of tax disputes with federal, state and municipal tax authorities in Brazil. These disputes are at various stages of the legal process, including the administrative review phase and the collection action phase, and include assessments of fixed amounts of principal and penalties, plus interest charges that increase at statutorily determined amounts per month and are assessed on the aggregate amount of the principal and penalties. In addition, at the collection action or court of appeals phase, the losing party could be subject to a charge to cover statutorily mandated legal fees, which are generally calculated as a percentage of the total assessed amounts due, inclusive of penalty and interest. Many of the claims relate to ICMS, services and social security tax disputes. The largest proportion of the assessed amounts relate to ICMS claims filed by the SPRA, encompassing the period from January 2002 to May 2005.

In October 2009, the Company received notification of the SPRA’s final administrative decision regarding the levying of ICMS in the State of São Paulo in relation to services provided to a customer in the State between January 2004 and May 2005. As of March 31, 2024, the principal amount of the tax assessment from the SPRA with regard to this case is approximately $1.2 million, with penalty, interest and fees assessed to date increasing such amount by an additional $18.6 million. On June 4, 2018, the Appellate Court of the State of São Paulo ruled in favor of the SPRA, but ruled that the assessed penalty should be reduced to approximately $1.2 million. After calculating the interest accrued on the penalty through March 31, 2024, the Company estimates that this ruling reduced the current overall potential liability for this case to approximately $8.1 million. All such amounts include the effect of foreign currency translation. The Company has appealed the ruling in favor of the SPRA to the Superior Court of Justice. Due to multiple court precedents in the Company’s favor, the Company does not believe a loss is probable.

Another ICMS tax case involving the SPRA refers to the tax period from January 2002 to December 2003. In December 2018, the administrative tribunal hearing the case upheld the Company's liability. The aggregate amount assessed by the tax authorities in August 2005 was $5.0 million (the amounts with regard to this claim are valued as of the date of the assessment, since it has not yet reached the collection phase), composed of a principal amount of $1.2 million, with penalty and interest assessed through that date increasing such amount by an additional $3.8 million. On December 6, 2018, the administrative tribunal reduced the applicable penalties to $0.6 million. After calculating the interest accrued on the current penalty through March 31, 2024, the Company estimates that the current overall liability for this case to be approximately $5.6 million. All such amounts include the effect of foreign currency translation. The Company has appealed to the judicial phase at the Third Trial Court of the District of Cubatão, State of São Paulo. On October 14, 2022, the District Court issued a decision holding that the Company is not liable for the taxes at issue. The SPRA appealed this decision on December 28, 2022 to the Appellate Court of the State of São Paulo (the "São Paulo Appellate Court"). On March 26, 2024, the São Paulo Appellate Court ruled that the Company is liable for the taxes at issue. In the same decision, the São Paulo Appellate Court also ruled in the Company's favor regarding the applicable tax rate. Due to multiple court precedents in the Company's favor, the Company does not believe a loss is probable.

The Company continues to believe that sufficient coverage for these claims exists as a result of the indemnification obligations of the Company's customer and such customer’s pledge of assets in connection with the October 2009 notice, as required by Brazilian law. On April 23, 2024, the Company’s customer directed the Company to accept a settlement offer made by SPRA and the Company accepted the settlement offer on April 26, 2024. Under the settlement, the Company will pay a total of $3.8 million over sixty months in return for a full release from the SPRA as to both claims. Pursuant to our contractual rights, the Company is indemnified by its customer for these amounts; therefore, no net loss has been recorded by the Company for this settlement.

On December 30, 2020, the Company received an assessment from the municipal authority in Ipatinga, Brazil alleging $2.1 million in unpaid service taxes from the period 2015 to 2020. After calculating the interest and penalties accrued, the Company estimates that the current overall potential liability for this case to be approximately $5.8 million. On July 21, 2023, the Company filed the last administrative appeal against the decision that maintained the assessment and a final administrative decision is still pending. Due to the multiple defenses that are available, the Company does not believe a loss is probable.

The Company intends to continue its practice of vigorously defending itself against these tax claims under various alternatives, including judicial appeal. The Company will continue to evaluate its potential liability with regard to these claims on a quarterly basis; however, it is not possible to predict the ultimate outcome of these tax-related disputes in Brazil. No loss provision has been recorded in the Company's Condensed Consolidated Financial Statements for the disputes described above because the loss contingency is not deemed probable, and the Company does not expect that any costs that are reasonably possible to be incurred by the Company in connection with Brazilian tax disputes would have a material adverse effect on the Company's financial condition, results of operations or cash flows.

Asbestos Actions

The Company is named as one of many defendants in legal actions in the U.S. alleging personal injury from exposure to airborne asbestos over the past several decades. In their suits, the plaintiffs have named as defendants, among others, many manufacturers, distributors and installers of numerous types of equipment or products that allegedly contained asbestos.

At March 31, 2024, there were approximately 17,000 pending asbestos personal injury actions filed against the Company. The vast majority of these actions were filed in the New York Supreme Court (New York County), of which the majority of such actions were on the Deferred/Inactive Docket created by the New York Supreme Court in December 2002 for all pending and future asbestos actions filed by persons who cannot demonstrate that they have a malignant condition or discernible physical impairment. A relatively small portion of cases are on the Active or In Extremis docket in New York County or on active dockets in other jurisdictions. The complaints in most of those actions generally follow a form that contains a standard demand of significant damages, regardless of the individual plaintiff's alleged medical condition, and without identifying any Company product.

The Company will continue to vigorously defend against such claims and is confident that it will be successful in doing so. The Company has never been a producer, manufacturer or processor of asbestos fibers. Any asbestos-containing part of a Company product used in the past was purchased from a supplier and the asbestos encapsulated in other materials such that airborne exposure, if it occurred, was not harmful and is not associated with the types of injuries alleged in the pending actions.

The Company has liability insurance coverage under various primary and excess policies that the Company believes will be available, if necessary, to substantially cover any liability that might ultimately be incurred in the asbestos actions referred to above. The costs and expenses of the asbestos actions are being paid by the Company's insurers.

In view of the persistence of asbestos litigation in the U.S., the Company expects to continue to receive additional claims in the future. The Company intends to continue its practice of vigorously defending these claims and cases. At March 31, 2024, the Company has successfully dismissed approximately 28,400 cases by stipulation or summary judgment prior to trial.

It is not possible to predict the ultimate outcome of asbestos-related actions in the U.S. due to the unpredictable nature of this litigation, and no loss provision has been recorded in the Company's Condensed Consolidated Financial Statements because a loss contingency is not deemed probable or estimable. Despite this uncertainty, and although results of operations and cash flows for a given period could be adversely affected by asbestos-related actions, the Company does not expect that any costs that are reasonably possible to be incurred by the Company in connection with asbestos litigation would have a material adverse effect on the Company's financial condition, results of operations or cash flows.

Other

On November 5, 2020, a worker suffered a fatal injury at a site owned by the Company’s customer, Gerdau Ameristeel US, Inc. ("Gerdau"), in Midlothian, TX. Although the Company was not directly involved in the accident, the worker was employed by a sub-contractor of a sub-contractor of the Company. The worker’s family filed suit in the 125th Judicial District Court of Harris County, TX against multiple parties, including the Company, seeking monetary damages. On May 11, 2023, the parties completed a formal settlement agreement, settling the claims brought by the worker's family. The Company paid its insurance deductible of $5.0 million and has recorded an indemnification receivable from Gerdau for the recovery of certain losses based upon the contractual indemnity rights. On August 25, 2023, the Company initiated arbitration proceedings against Gerdau before the American Arbitration Association to enforce its contractual indemnity rights. There can be no assurances that the Company's position will ultimately prevail; however, any financial statement impact is not expected to be material.

The Company is subject to various other claims and legal proceedings covering a wide range of matters that arose in the ordinary course of business. In the opinion of management, all such matters are adequately covered by insurance or by established reserves, and, if not so covered, are without merit or are of such kind, or involve such amounts, as would not have a material adverse effect on the financial position, results of operations or cash flows of the Company.

Insurance liabilities are recorded when it is probable that a liability has been incurred for a particular event and the amount of loss associated with the event can be reasonably estimated. Insurance reserves have been estimated based primarily upon actuarial calculations and reflect the undiscounted estimated liabilities for ultimate losses, including claims incurred but not reported. Inherent in these estimates are assumptions that are based on the Company's history of claims and losses, a detailed analysis of existing claims with respect to potential value, and current legal and legislative trends. If actual claims differ from those projected by management, changes (either increases or decreases) to insurance reserves may be required and would be recorded through income in the period the change was determined. When a recognized liability has been determined to be covered by third-party insurance, the Company records an insurance claim receivable to reflect the covered liability. Insurance claim receivables are included in Other receivables on the Company's Condensed Consolidated Balance Sheets. See Note 1, Summary of Significant Accounting Policies in Part II, Item 8 Financial Statements and Supplementary Data in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, under Accrued Insurance and Loss Reserves, for additional information.

Basis of Presentation	3 Months Ended
Basis of Presentation	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Company has prepared these unaudited condensed consolidated financial statements in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X of the SEC. Accordingly, the unaudited Condensed Consolidated Financial Statements do not include all information and disclosure required by U.S. GAAP for annual financial statements. The December 31, 2023 Condensed Consolidated Balance Sheet information contained in this Quarterly Report on Form 10-Q was derived from the 2023 audited consolidated financial statements. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. In the opinion of management, all adjustments (all of which are of a normal recurring nature) that are necessary for a fair statement are reflected in these unaudited Condensed Consolidated Financial Statements. Liquidity The Company’s cash flow forecasts, combined with existing cash and cash equivalents and borrowings available under the Senior Secured Credit Facilities, indicate sufficient liquidity to fund the Company’s operations for at least the next twelve months. As such, the Company’s unaudited Consolidated Financial Statements have been prepared on the basis that it will continue as a going concern for a period extending beyond twelve months from the date the unaudited Consolidated Financial Statements are issued. This assessment includes the expected ability to meet required financial covenants and the continued ability to draw down on the Senior Secured Credit Facilities (see Note 9, Debt and Credit Agreements). Reclassifications During the three months ended March 31, 2024, the Company determined that the held-for-sale criteria for Rail was no longer met and, as a result, the Company made reclassifications to prior year amounts previously classified as discontinued operations and assets held-for-sale in the Company's Consolidated Statements of Operations and Consolidated Balance Sheets, along with the accompanying notes to the Company's Consolidated Financial Statements. See Note 3, Discontinued Operations and Dispositions for further details.

Goodwill and Other Intangible Assets	3 Months Ended
Goodwill and Other Intangible Assets	Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company tests for goodwill impairment annually, or more frequently if indicators of impairment exist, or if a decision is made to dispose of a business. The Company performs its annual goodwill impairment test as of October 1 and monitors for triggering events on an ongoing basis. During the three months ended March 31, 2024, the Company determined that there were no events or indicators present that would indicate that it was more-likely-than-not that its reporting units' fair values were less than their carrying amounts, which would require a further interim impairment analysis. However, unfavorable economic conditions, including continued cost inflation and labor shortages, as well as rising interest rates, could impact the Company's future projected cash flows and discount rates used to estimate fair value, which could result in an impairment charge to any of the Company's reporting units in a future period.

Review of Operations by Segment

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Review of Operations by Segment


	Three Months Ended
	March 31
(In thousands)		2024		2023
Revenues
Harsco Environmental		$	299,119	$	273,189
Clean Earth		226,030		222,464
Harsco Rail		75,168		65,052

Total Revenues		$	600,317	$	560,705

Operating Income (Loss) from Continuing Operations
Harsco Environmental		$	19,588	$	22,285
Clean Earth		20,593		16,471
Harsco Rail		(9,061)		2,345
Corporate		(5,307)		(9,186)
Total Operating Income (Loss) from Continuing Operations		$	25,813	$	31,915

Depreciation
Harsco Environmental		$	28,789	$	27,560
Clean Earth		7,413		4,927
Harsco Rail		361		—
Corporate		357		552
Total Depreciation		$	36,920	$	33,039

Amortization
Harsco Environmental		$	1,018	$	999
Clean Earth		6,167		6,029
Harsco Rail		22		—
Corporate (a)		967		937
Total Amortization		$	8,174	$	7,965
Capital Expenditures
Harsco Environmental		$	20,553	$	16,551
Clean Earth		5,334		4,830
Harsco Rail		965		665
Corporate		29		100
Total Capital Expenditures		$	26,881	$	22,146

(a) Amortization expense on Corporate relates to the amortization of deferred financing costs.

Reconciliation of Segment Operating Income to Income (Loss) From Continuing Operations before Income Taxes and Equity Income


	Three Months Ended
	March 31
(In thousands)		2024		2023
Segment operating income (loss)		$	31,120	$	41,101
General Corporate expense		(5,307)		(9,186)
Operating income (loss) from continuing operations		25,813		31,915
Interest income		1,697		1,480
Interest expense		(28,122)		(24,995)
Facility fees and debt-related income (expense)		(2,789)		(2,363)

Defined benefit pension income (expense)		(4,176)		(5,329)
Income (loss) from continuing operations before income taxes and equity income		$	(7,577)	$	708

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-15

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-31

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//280/tableOfContent

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 26
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-26

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-34

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 21
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-21

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

+ Details

Debt and Credit Agreements - Narrative (Details)	3 Months Ended			9 Months Ended
Debt and Credit Agreements - Narrative (Details)	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2024	Sep. 30, 2024
Debt Instrument [Line Items]
Total net debt to consolidated adjusted EBITDA ratio			4.08
Consolidated Adjusted EBITDA To Consolidated Interest Charges Ratio			3.06
Revolving Credit Facility \| Forecast
Debt Instrument [Line Items]
Leverage ratio					0.50
Threshold of consolidated adjusted EBITDA to consolidated interest charges ratio covenant	3.00			3.00
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Threshold of consolidated adjusted EBITDA to consolidated interest charges ratio covenant			2.75
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Net debt to consolidated adjusted EBITDA ratio			5.25
Revolving Credit Facility \| Maximum \| Forecast
Debt Instrument [Line Items]
Net debt to consolidated adjusted EBITDA ratio		4.00

Derivative Instruments, Hedging Activities and Fair Value - Instrument Not Designated As Hedging Instrument (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Foreign currency exchange forward contracts \| Cost of services and products sold
Derivative [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 9,914	$ (3,297)

Accounts Receivable and Note Receivable

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Accounts Receivable and Note Receivable

Accounts receivable consist of the following:


(In thousands)	March 31 2024		December 31 2023
Trade accounts receivable	$	322,102	$	353,709
Less: Allowance for expected credit losses	(13,889)		(15,522)

Trade accounts receivable, net	$	308,213	$	338,187

Other receivables (a)	$	33,693	$	40,565

(a) Other receivables include employee receivables, insurance receivable, tax claims and refunds and other miscellaneous items not included in Trade accounts receivable, net.

The provision for expected credit losses related to trade accounts receivable was as follows:


	Three Months Ended
	March 31
(In thousands)		2024		2023
Provision for expected credit losses related to trade accounts receivable		$	(167)	$	507

At March 31, 2024, $14.7 million of the Company's trade accounts receivable were past due by twelve months or more, with $9.3 million of this amount reserved.

Accounts Receivable Securitization Facility

In June 2022, the Company and its SPE entered into an AR Facility with PNC Bank, National Association ("PNC") to accelerate cash flows from trade accounts receivable. The AR Facility has a three-year term. The maximum purchase commitment by PNC is $150.0 million.

The total outstanding balance of trade receivables that have been sold and derecognized by the SPE is $150.0 million as of March 31, 2024 and December 31, 2023. The SPE owned $71.6 million and $82.2 million of trade receivables as of March 31, 2024 and December 31, 2023, respectively, which is included in the caption Trade accounts receivable, net, on the Condensed Consolidated Balance Sheets. See Note 9, Debt and Credit Agreements, for AR Facility expenses incurred.

The Company received proceeds of $5.0 million from the AR Facility in the first quarter of 2023.

Factoring Arrangements

The Company maintains factoring arrangements with a financial institution to sell certain accounts receivable that are also accounted for as a sale of financial assets and accordingly, derecognized from the Company's Consolidated Balance Sheet. The following table reflects balances for net amounts sold and program capacities for the arrangements:


(In millions)	March 31 2024		December 31 2023
Net amounts sold under factoring arrangements	$	14.7	$	16.1
Program capacities	32.0		32.6

Note Receivable

In January 2020, the Company sold IKG for $85.0 million including cash and a note receivable, subject to post-closing adjustments. The note receivable from the buyer has a face value of $40.0 million, bearing interest at 2.50%, that is paid in kind and matures on January 31, 2027. Any unpaid principal, along with any accrued but unpaid interest is payable at maturity. Prepayment is required in case of a change in control or a percentage of excess cash flow, as defined in the note receivable agreement. Because there are no scheduled payments under the terms of the note receivable, the balance is classified as noncurrent as of March 31, 2024 and December 31, 2023, and is included in the caption Other assets on the Condensed Consolidated Balance Sheet at amortized cost.


(In millions)	March 31 2024		December 31 2023
Note receivable, at amortized cost	$	14.3	$	14.0
Note receivable, fair value	15.8		15.4

Discontinued Operations and Dispositions - Schedule of Income (Loss) from Discontinued Operations Harsco Rail (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	$ 600,317	$ 560,705
Selling, general and administrative expenses	87,126	81,861
Research and development expenses	861	520
Other expense (income)	2,440	5,648
Total costs and expenses	574,504	528,790
Operating income from continuing operations	25,813	31,915
Interest income	1,697	1,480
Interest expense	28,122	24,995
Defined benefit pension income	4,176	5,329
Income (loss) from continuing operations before income taxes	(7,577)	708
Income tax benefit (expense) from continuing operations	7,915	8,017
Income (loss) from continuing operations	(15,741)	(7,442)
Revision of Prior Period, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cost of services and products sold	51,369
Harsco Rail Segment \| Revision of Prior Period, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues		65,052
Selling, general and administrative expenses		9,926
Research and development expenses		344
Other expense (income)		503
Total costs and expenses		62,142
Operating income from continuing operations		2,910
Interest income		25
Interest expense		(667)
Defined benefit pension income		6
Income (loss) from continuing operations before income taxes		2,274
Income tax benefit (expense) from continuing operations		(1,094)
Income (loss) from continuing operations		1,180
Service revenues \| Harsco Rail Segment \| Revision of Prior Period, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues		7,720
Cost of services and products sold		5,626
Product Revenues
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues	101,163	99,145
Cost of services and products sold	$ 85,410	82,549
Product Revenues \| Harsco Rail Segment \| Revision of Prior Period, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total revenues		57,332
Cost of services and products sold		$ 45,743

Employee Benefit Plans (Details) - Pension Plan - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
U.S. Plans
Defined benefit plans:
Service costs	$ 0	$ 0
Interest costs	2,419	2,543
Expected return on plan assets	(2,236)	(1,750)
Recognized prior service costs	0	0
Recognized actuarial losses	1,045	1,151
Defined benefit pension plans net periodic pension cost (benefit)	1,228	1,944
Defined benefit pension plan	400
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year	7,300
International Plans
Defined benefit plans:
Service costs	338	313
Interest costs	7,460	7,429
Expected return on plan assets	(8,370)	(7,678)
Recognized prior service costs	118	114
Recognized actuarial losses	3,801	3,519
Defined benefit pension plans net periodic pension cost (benefit)	3,347	$ 3,697
Defined benefit pension plan	4,300
Anticipated contributions to defined benefit pension plans during the remainder of the fiscal year	$ 13,200

Review of Operations by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operations by segment
Revenues	$ 600,317	$ 560,705
Operating income from continuing operations	25,813	31,915
Interest income	1,697	1,480
Interest expense	(28,122)	(24,995)
Facility fees and debt-related income (expense)	(2,789)	(2,363)
Defined benefit pension income (expense)	(4,176)	(5,329)
Income (loss) from continuing operations before income taxes and equity income	(7,577)	708
Depreciation	36,920	33,039
Amortization	8,174	7,965
Capital Expenditures	26,881	22,146
Operating Segments
Operations by segment
Operating income from continuing operations	31,120	41,101
Operating Segments \| Harsco Environmental Segment
Operations by segment
Revenues	299,119	273,189
Operating income from continuing operations	19,588	22,285
Depreciation	28,789	27,560
Amortization	1,018	999
Capital Expenditures	20,553	16,551
Operating Segments \| Clean Earth Segment
Operations by segment
Revenues	226,030	222,464
Operating income from continuing operations	20,593	16,471
Depreciation	7,413	4,927
Amortization	6,167	6,029
Capital Expenditures	5,334	4,830
Operating Segments \| Harsco Rail Segment
Operations by segment
Revenues	75,168	65,052
Operating income from continuing operations	(9,061)	2,345
Depreciation	361	0
Amortization	22	0
Capital Expenditures	965	665
Corporate
Operations by segment
Operating income from continuing operations	(5,307)	(9,186)
Depreciation	357	552
Amortization	967	937
Capital Expenditures	$ 29	$ 100

Review of Operations by Segment (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Schedule of operations by segment


	Three Months Ended
	March 31
(In thousands)		2024		2023
Revenues
Harsco Environmental		$	299,119	$	273,189
Clean Earth		226,030		222,464
Harsco Rail		75,168		65,052

Total Revenues		$	600,317	$	560,705

Operating Income (Loss) from Continuing Operations
Harsco Environmental		$	19,588	$	22,285
Clean Earth		20,593		16,471
Harsco Rail		(9,061)		2,345
Corporate		(5,307)		(9,186)
Total Operating Income (Loss) from Continuing Operations		$	25,813	$	31,915

Depreciation
Harsco Environmental		$	28,789	$	27,560
Clean Earth		7,413		4,927
Harsco Rail		361		—
Corporate		357		552
Total Depreciation		$	36,920	$	33,039

Amortization
Harsco Environmental		$	1,018	$	999
Clean Earth		6,167		6,029
Harsco Rail		22		—
Corporate (a)		967		937
Total Amortization		$	8,174	$	7,965
Capital Expenditures
Harsco Environmental		$	20,553	$	16,551
Clean Earth		5,334		4,830
Harsco Rail		965		665
Corporate		29		100
Total Capital Expenditures		$	26,881	$	22,146

(a) Amortization expense on Corporate relates to the amortization of deferred financing costs.

Reconciliation of segment operating income to income from continuing operations before income taxes and equity income

Reconciliation of Segment Operating Income to Income (Loss) From Continuing Operations before Income Taxes and Equity Income


	Three Months Ended
	March 31
(In thousands)		2024		2023
Segment operating income (loss)		$	31,120	$	41,101
General Corporate expense		(5,307)		(9,186)
Operating income (loss) from continuing operations		25,813		31,915
Interest income		1,697		1,480
Interest expense		(28,122)		(24,995)
Facility fees and debt-related income (expense)		(2,789)		(2,363)

Defined benefit pension income (expense)		(4,176)		(5,329)
Income (loss) from continuing operations before income taxes and equity income		$	(7,577)	$	708

Accounts Receivable and Note Receivable - Schedule of Changes in Provisions For Allowance For Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Receivables [Abstract]
Provision for expected credit losses related to trade accounts receivable	$ (167)	$ 507

Accounts Receivable and Note Receivable (Tables)

3 Months Ended

Mar. 31, 2024

Receivables [Abstract]

Schedule of accounts receivable

Accounts receivable consist of the following:


(In thousands)	March 31 2024		December 31 2023
Trade accounts receivable	$	322,102	$	353,709
Less: Allowance for expected credit losses	(13,889)		(15,522)

Trade accounts receivable, net	$	308,213	$	338,187

Other receivables (a)	$	33,693	$	40,565

(a) Other receivables include employee receivables, insurance receivable, tax claims and refunds and other miscellaneous items not included in Trade accounts receivable, net.


(In millions)	March 31 2024		December 31 2023
Note receivable, at amortized cost	$	14.3	$	14.0
Note receivable, fair value	15.8		15.4

Schedule of provision for doubtful accounts related to trade accounts receivable

The provision for expected credit losses related to trade accounts receivable was as follows:


	Three Months Ended
	March 31
(In thousands)		2024		2023
Provision for expected credit losses related to trade accounts receivable		$	(167)	$	507

Shedule of Net Amounts Sold and Program Capacities

The following table reflects balances for net amounts sold and program capacities for the arrangements:


(In millions)	March 31 2024		December 31 2023
Net amounts sold under factoring arrangements	$	14.7	$	16.1
Program capacities	32.0		32.6

Revenue Recognition

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenues

The Company recognizes revenues to depict the transfer of promised services and products to customers in an amount that reflects the consideration the Company expects to receive in exchange for those services and products. Service revenues include CE and the service components of HE and Rail. Product revenues include portions of HE and Rail.

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, 2024
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		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



	Three Months Ended
	March 31, 2023
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		Consolidated Totals
Primary Geographical Markets (a):
North America	$	78,473	$	222,464	$	44,162	$	345,099
Western Europe	101,386		—		13,187		114,573
Latin America (b)	40,955		—		604		41,559
Asia-Pacific	28,961		—		7,099		36,060
Middle East and Africa	18,405		—		—		18,405
Eastern Europe	5,009		—		—		5,009
Total Revenues	$	273,189	$	222,464	$	65,052	$	560,705


Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	229,361	$	—	$	—	$	229,361
Ecoproducts	38,402		—		—		38,402
Environmental systems for aluminum dross and scrap processing	5,426		—		—		5,426
Railway track maintenance equipment	—		—		29,444		29,444
After-market parts and services; safety and diagnostic technology	—		—		27,793		27,793
Railway contracting services	—		—		7,815		7,815
Hazardous waste processing solutions	—		186,112		—		186,112
Soil and dredged materials processing and reuse solutions	—		36,352		—		36,352
Total Revenues	$	273,189	$	222,464	$	65,052	$	560,705

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

(b) Includes Mexico.

The Company may receive payments in advance of earning revenue (advances on contracts), which are included in Current portion of advances on contracts and Other liabilities on the Condensed Consolidated Balance Sheets. The Company may recognize revenue in advance of being able to contractually invoice the customer (contract assets), which is included in Current portion of contract assets and Other assets on the Condensed Consolidated Balance Sheets. Contract assets are transferred to Trade accounts receivable, net, when the right to payment becomes unconditional. Contract assets and advances on contracts are reported as a net position, on a contract-by-contract basis, at the end of each reporting period. These instances are primarily related to Rail.

The Company had contract assets totaling $95.8 million and $86.9 million at March 31, 2024 and December 31, 2023, respectively. The Company had advances on contracts totaling $36.2 million and $38.6 million at March 31, 2024 and December 31, 2023, respectively. During the three months ended March 31, 2024, the Company recognized $10.7 million of revenue related to amounts previously included in advances on contracts. During the three months ended March 31, 2023, the Company recognized $11.6 million of revenue related to amounts previously included in advances on contracts.

At March 31, 2024, HE had remaining, fixed, unsatisfied performance obligations where the expected contract duration exceeds one year totaling $82.2 million. Of this amount, $21.8 million is expected to be fulfilled by March 31, 2025, $20.5 million by March 31, 2026, $15.0 million by March 31, 2027, $12.4 million by March 31, 2028 and the remainder thereafter. These amounts exclude any variable fees, fixed fees subject to indexation and any performance obligations expected to be satisfied within one year.

At March 31, 2024, Rail had remaining, fixed, unsatisfied performance obligations where the expected contract duration exceeds one year totaling $140.7 million. Of this amount, $53.4 million is expected to be fulfilled by March 31, 2025, $61.0 million by March 31, 2026, $22.6 million by March 31, 2027, and $3.7 million by March 31, 2028. These amounts exclude any variable fees, fixed fees subject to indexation and any performance obligations expected to be satisfied within one year.

The Rail Segment is currently manufacturing highly-engineered equipment under large long-term fixed-price contracts with SBB, Network Rail, and Deutsche Bahn. As previously disclosed, the Company recognized estimated forward loss provisions in 2022 and 2023 related to these contracts due to several factors, such as material and labor cost inflation, supply chain delays, the bankruptcy of a key vendor and increased engineering efforts. No provisions related to these contracts were recognized in three months ended March 31, 2024 and 2023.

The estimated forward loss provisions represent the Company's best estimate based on currently available information. It is possible that the Company's overall estimate of liquidated damages, penalties and costs to complete these contracts may change, which could result in an additional estimated forward loss provision at such time that could be material. The Company will continue to update its estimates to complete these contracts, which will include the effect of negotiations with the customers regarding price increases, change orders and extensions to delivery schedules.

As of March 31, 2024, the contracts with Network Rail, Deutsche Bahn and the second contract with SBB are 59%, 43% and 88% complete, respectively based on costs incurred. The first contract with SBB has been completed.

The Company provides assurance type warranties primarily for product sales at Rail. These warranties are typically not priced or negotiated separately (there is no option to separately purchase the warranty) or the warranty does not provide customers with a service in addition to the assurance that the product complies with agreed-upon specifications. Accordingly, such warranties do not represent separate performance obligations.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-10

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-15

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-12

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
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+ Details

Reconciliation of Basic and Diluted Shares

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Shares


	Three Months Ended
	March 31
(In thousands, except per share amounts)	2024		2023
Income (loss) from continuing operations attributable to Enviri Corporation common stockholders	$	(16,857)	$	(8,377)
Weighted-average shares outstanding:
Weighted-average shares outstanding - basic	79,945		79,633
Dilutive effect of stock-based compensation	—		—
Weighted-average shares outstanding - diluted	79,945		79,633

Earnings (loss) from continuing operations per common share, attributable to Enviri Corporation common stockholders:
Basic	$	(0.21)	$	(0.11)

Diluted	$	(0.21)	$	(0.11)

The following average outstanding stock-based compensation units were not included in the computation of diluted earnings (loss) per share because the effect was either antidilutive or the market conditions for the performance share units were not met:


	Three Months Ended
	March 31
(In thousands)		2024	2023
Restricted stock units		1,686	1,000

Stock appreciation rights		2,890	2,473
Performance share units		1,880	1,394

Derivative Instruments, Hedging Activities and Fair Value - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Foreign Currency Derivatives
Net asset (liability) offset against collateral	$ 0.8		$ (0.5)
Pre-tax net gains (losses) on certain loans designated as hedges of net investments in foreign subsidiaries	0.8	$ 0.3
Long-term debt, fair value	1,436.9		1,394.5
Foreign currency exchange forward contracts
Foreign Currency Derivatives
Derivative, Notional Amount	648.5		633.3
Term Loan
Foreign Currency Derivatives
Principal amount	$ 300.0
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Term Loan \| Term Loan Facility, Fixed-Rate \| Minimum
Foreign Currency Derivatives
Variable rate basis spread (as a percent)	4.16%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Term Loan \| Term Loan Facility, Fixed-Rate \| Maximum
Foreign Currency Derivatives
Variable rate basis spread (as a percent)	4.21%
Reported Value Measurement
Foreign Currency Derivatives
Long-term Debt	$ 1,472.1		$ 1,429.0

Inventories

3 Months Ended

Mar. 31, 2024

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following:


(In thousands)	March 31 2024		December 31 2023
Finished goods	$	16,430	$	16,171
Work-in-process	10,715		13,081

Raw materials and purchased parts	116,073		114,046
Stores and supplies	47,070		46,071
Total inventories	$	190,288	$	189,369

Revenue Recognition - Revenues by Primary Geographical Markets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 600,317	$ 560,705
Environmental services related to resource recovery for metals manufacturing and related logistical services
Disaggregation of Revenue [Line Items]
Total revenues	258,128	229,361
Ecoproducts
Disaggregation of Revenue [Line Items]
Total revenues	36,264	38,402
Environmental systems for aluminum dross and scrap processing
Disaggregation of Revenue [Line Items]
Total revenues	4,727	5,426
Railway Track Maintenance Equipment
Disaggregation of Revenue [Line Items]
Total revenues	29,918	29,444
After-market Parts and Services; Safety and Diagnostic Technology
Disaggregation of Revenue [Line Items]
Total revenues	30,876	27,793
Railway Contracting Services
Disaggregation of Revenue [Line Items]
Total revenues	14,374	7,815
Hazardous waste processing solutions
Disaggregation of Revenue [Line Items]
Total revenues	191,910	186,112
Soil and dredged materials processing and reuse solutions
Disaggregation of Revenue [Line Items]
Total revenues	34,120	36,352
North America
Disaggregation of Revenue [Line Items]
Total revenues	354,671	345,099
Western Europe
Disaggregation of Revenue [Line Items]
Total revenues	131,647	114,573
Latin America
Disaggregation of Revenue [Line Items]
Total revenues	43,961	41,559
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenues	37,240	36,060
Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	28,349	18,405
Eastern Europe
Disaggregation of Revenue [Line Items]
Total revenues	4,449	5,009
Operating Segments \| Harsco Environmental Segment
Disaggregation of Revenue [Line Items]
Total revenues	299,119	273,189
Operating Segments \| Harsco Environmental Segment \| Environmental services related to resource recovery for metals manufacturing and related logistical services
Disaggregation of Revenue [Line Items]
Total revenues	258,128	229,361
Operating Segments \| Harsco Environmental Segment \| Ecoproducts
Disaggregation of Revenue [Line Items]
Total revenues	36,264	38,402
Operating Segments \| Harsco Environmental Segment \| Environmental systems for aluminum dross and scrap processing
Disaggregation of Revenue [Line Items]
Total revenues	4,727	5,426
Operating Segments \| Harsco Environmental Segment \| Railway Track Maintenance Equipment
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Environmental Segment \| After-market Parts and Services; Safety and Diagnostic Technology
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Environmental Segment \| Railway Contracting Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Environmental Segment \| Hazardous waste processing solutions
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Environmental Segment \| Soil and dredged materials processing and reuse solutions
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Environmental Segment \| North America
Disaggregation of Revenue [Line Items]
Total revenues	84,210	78,473
Operating Segments \| Harsco Environmental Segment \| Western Europe
Disaggregation of Revenue [Line Items]
Total revenues	110,275	101,386
Operating Segments \| Harsco Environmental Segment \| Latin America
Disaggregation of Revenue [Line Items]
Total revenues	42,921	40,955
Operating Segments \| Harsco Environmental Segment \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenues	28,915	28,961
Operating Segments \| Harsco Environmental Segment \| Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	28,349	18,405
Operating Segments \| Harsco Environmental Segment \| Eastern Europe
Disaggregation of Revenue [Line Items]
Total revenues	4,449	5,009
Operating Segments \| Clean Earth Segment
Disaggregation of Revenue [Line Items]
Total revenues	226,030	222,464
Operating Segments \| Clean Earth Segment \| Environmental services related to resource recovery for metals manufacturing and related logistical services
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Ecoproducts
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Environmental systems for aluminum dross and scrap processing
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Railway Track Maintenance Equipment
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| After-market Parts and Services; Safety and Diagnostic Technology
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Railway Contracting Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Hazardous waste processing solutions
Disaggregation of Revenue [Line Items]
Total revenues	191,910	186,112
Operating Segments \| Clean Earth Segment \| Soil and dredged materials processing and reuse solutions
Disaggregation of Revenue [Line Items]
Total revenues	34,120	36,352
Operating Segments \| Clean Earth Segment \| North America
Disaggregation of Revenue [Line Items]
Total revenues	226,030	222,464
Operating Segments \| Clean Earth Segment \| Western Europe
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Latin America
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Clean Earth Segment \| Eastern Europe
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment
Disaggregation of Revenue [Line Items]
Total revenues	75,168	65,052
Operating Segments \| Harsco Rail Segment \| Environmental services related to resource recovery for metals manufacturing and related logistical services
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment \| Ecoproducts
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment \| Environmental systems for aluminum dross and scrap processing
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment \| Railway Track Maintenance Equipment
Disaggregation of Revenue [Line Items]
Total revenues	29,918	29,444
Operating Segments \| Harsco Rail Segment \| After-market Parts and Services; Safety and Diagnostic Technology
Disaggregation of Revenue [Line Items]
Total revenues	30,876	27,793
Operating Segments \| Harsco Rail Segment \| Railway Contracting Services
Disaggregation of Revenue [Line Items]
Total revenues	14,374	7,815
Operating Segments \| Harsco Rail Segment \| Hazardous waste processing solutions
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment \| Soil and dredged materials processing and reuse solutions
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment \| North America
Disaggregation of Revenue [Line Items]
Total revenues	44,431	44,162
Operating Segments \| Harsco Rail Segment \| Western Europe
Disaggregation of Revenue [Line Items]
Total revenues	21,372	13,187
Operating Segments \| Harsco Rail Segment \| Latin America
Disaggregation of Revenue [Line Items]
Total revenues	1,040	604
Operating Segments \| Harsco Rail Segment \| Asia-Pacific
Disaggregation of Revenue [Line Items]
Total revenues	8,325	7,099
Operating Segments \| Harsco Rail Segment \| Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Operating Segments \| Harsco Rail Segment \| Eastern Europe
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0

Other (Income) Expenses, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Other Income and Expenses [Abstract]
Employee termination benefit costs	$ 382	$ (26)
Other costs (income) for exit activities (a)	548	(5,728)
Net gains on sale of assets	(3,370)	(230)
Other	0	336
Other (income) expenses, net	(2,440)	$ (5,648)
Net gain	$ (6,800)

Discontinued Operations and Dispositions - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Disposal Group, Held-for-Sale, Not Discontinued Operations \| Performix Metallurgical Additives
Business Acquisition [Line Items]
Accounts receivable	$ 4.7	$ 5.3
Harsco Rail Segment
Business Acquisition [Line Items]
Reduction in carrying amount of assets	$ 10.7

Debt and Credit Agreements (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of long-term debt instruments

Long-term debt consists of the following:


(In thousands)	March 31 2024		December 31 2023

Senior Secured Credit Facilities:
New Term Loan	$	486,250	$	487,500


Revolving Credit Facility	457,000		422,000
5.75% Senior Notes	475,000		475,000
Other financing payable (including finance leases) in varying amounts	53,810		44,469
Total debt obligations	1,472,060		1,428,969
Less: deferred financing costs	(11,156)		(11,974)
Total debt obligations, net of deferred financing costs	1,460,904		1,416,995
Less: current maturities of long-term debt	(16,021)		(15,558)
Long-term debt	$	1,444,883	$	1,401,437

Schedule of facility fees and debt-related income (expense)

The components of the Condensed Consolidated Statements of Operations caption Facility fees and debt-related income (expense) were as follows:


	Three Months Ended
	March 31
(In thousands)	2024		2023

Unused debt commitment and amendment fees	$	—	$	(12)
Securitization and factoring fees	(2,789)		(2,351)
Facility fees and debt-related income (expense)	$	(2,789)	$	(2,363)

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Total other comprehensive income, deferred income taxes	$ (1,433)	$ 1,901
Vesting of restricted stock units and other stock grants (in shares)	201,053	177,574

- Definition

Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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+ Details

Discontinued Operations and Dispositions

3 Months Ended

Mar. 31, 2024

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations and Dispositions

Harsco Rail Segment

The results of the Rail business were previously presented as discontinued operations. However, the held for sale criteria were no longer met as of March 31, 2024 as the sales process has been paused. The assets and liabilities of the Rail business, previously presented as held for sale, have been reclassified to held and used in the Condensed Consolidated Balance Sheets as of December 31, 2023, and the results of the Rail business have been reclassified from discontinued operations to continuing operations for all periods presented in the Condensed Consolidated Statements of Operations. The Rail business’ assets and liabilities as of March 31, 2024 were measured at the carrying amount before the assets were classified as held for sale, reduced by $10.7 million representing the depreciation and amortization expense that would have been recognized had the assets been continuously classified as held for use. The $10.7 million reduction to the carrying value of the Rail assets was reported in Remeasurement of long-lived assets in the first quarter of 2024.

The reclassification of the Rail business's balance sheet positions as of December 31, 2023 had the following impacts on the Condensed Consolidated Balance Sheets and are summarized as follows:


(in thousands)	December 31 2023
Trade accounts receivable, net	$	57,415
Other receivables	6,708
Inventories	103,077
Current portion of contract assets	56,341
Prepaid expenses	28,797
Other current assets	2,895
Property, plant and equipment, net	44,113
Right-of-use assets, net	7,050
Goodwill	13,026
Intangible assets, net	3,122
Deferred income tax assets	973

Other assets	22,792
Total assets	$	346,309

Accounts payable	$	44,703
Accrued compensation	6,056
Income taxes payable	1,434
Current portion of operating lease liabilities	3,656
Current portion of advances on contracts	32,912
Reserve for forward losses on contracts	52,725
Other current liabilities	30,550

Operating lease liabilities	3,331
Deferred tax liabilities	350
Other liabilities	494
Total liabilities	$	176,211

The reclassification of the results of the Rail business to continuing operations had the following impacts on the Consolidated Statement of Operations for the three months ended March 31, 2023:


	Three Months Ended
	March 31
(In thousands)		2023
Service revenues		$	7,720
Product revenues		57,332
Total revenues		65,052
Cost of services sold		5,626
Cost of products sold		45,743
Total cost of sales		51,369
Selling, general and administrative expenses		9,926
Research and development expenses		344
Other expense (income)		503
Total costs and expenses		62,142
Operating income from continuing operations		2,910
Interest income		25
Interest expense		(667)
Defined benefit pension income		6
Income (loss) from continuing operations before income taxes		2,274
Income tax benefit (expense) from continuing operations		(1,094)
Income (loss) from continuing operations		$	1,180

Harsco Environmental Segment

On April 1, 2024, the Company completed the sale of Performix Metallurgical Additives, LLC, a subsidiary of HE. As the criteria for discontinued operations accounting was not met but the sale was probable as of March 31, 2024, the assets and liabilities of this business have been classified as held for sale in the Company’s Consolidated Balance Sheet. The most material classes of assets as of March 31, 2024 were Accounts receivable of $4.7 million and Goodwill of $5.3 million.

Other

Discontinued operations include costs directly attributable to retained contingent liabilities of other previously disposed businesses.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ (16,846)		$ (8,590)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	36,920		33,039
Amortization	8,174		7,965
Deferred income tax (benefit) expense	3,445		(56)
Equity (income) loss of unconsolidated entities, net	249		133
Remeasurement of long-lived assets	10,695	$ 10,700	0
Other, net	772		1,009
Changes in assets and liabilities, net of acquisitions and dispositions of businesses:
Accounts receivable	24,426		(14,533)
Inventories	(5,297)		(8,534)
Contract assets	(9,199)		11,698
Right-of-use assets	8,599		7,842
Accounts payable	(13,751)		17,735
Accrued interest payable	(6,820)		(6,998)
Accrued compensation	(25,531)		7,343
Advances on contracts	(1,618)		(5,591)
Operating lease liabilities	(8,212)		(7,202)
Retirement plan liabilities, net	(340)		814
Other assets and liabilities	(4,318)		838
Net cash (used) provided by operating activities	1,348		36,912
Cash flows from investing activities:
Purchases of property, plant and equipment	(26,881)		(22,146)
Proceeds from sales of assets	4,313		823
Expenditures for intangible assets	(77)		(36)
Net proceeds (payments) from settlement of foreign currency forward exchange contracts	(602)		(1,212)
Other investing activities, net	1		32
Net cash used by investing activities	(23,246)		(22,539)
Cash flows from financing activities:
Short-term borrowings, net	(9,003)		(3,029)
Current maturities and long-term debt:
Additions	35,323		59,000
Reductions	(4,967)		(57,200)
Dividends paid to noncontrolling interests	(8,243)		0
Contributions from noncontrolling interests	874		0
Stock-based compensation - Employee taxes paid	(1,040)		(930)
Other financing activities, net	(1)		0
Net cash (used) provided by financing activities	12,943		(2,159)
Effect of exchange rate changes on cash and cash equivalents, including restricted cash	(8,251)		(1,072)
Net increase (decrease) in cash and cash equivalents, including restricted cash	(17,206)		11,142
Cash and cash equivalents, including restricted cash, at beginning of period	124,614		85,094
Cash and cash equivalents, including restricted cash, at end of period	107,408	$ 124,614	96,236
Supplementary cash flow information:
Change in accrual for purchases of property, plant and equipment included in accounts payable	$ 120		$ 7,524

Components of Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Components of Accumulated Other Comprehensive Loss

AOCI is included on the Condensed Consolidated Statements of Stockholders' Equity. The components of AOCI, net of the effect of income taxes, and activity for the three months ended March 31, 2023 and 2024 were as follows:


	Components of AOCI, Net of Tax
(In thousands)	Cumulative Foreign Exchange Translation Adjustments			Effective Portion of Derivatives Designated as Hedging Instruments			Cumulative Unrecognized Actuarial Losses on Pension Obligations			Unrealized Gain (Loss) on Marketable Securities		Total
Balance at December 31, 2022	$	(213,104)		$	157		$	(354,699)		$	10	$	(567,636)

OCI before reclassifications	12,446		(a)	(2,684)		(b)	(7,227)		(a)	1		2,536
Amounts reclassified from AOCI, net of tax	—			124			4,492			—		4,616



Total OCI	12,446			(2,560)			(2,735)			1		7,152
Less: OCI attributable to noncontrolling interests	(358)			—			—			—		(358)
OCI attributable to Enviri Corporation	12,088			(2,560)			(2,735)			1		6,794
Balance at March 31, 2023	$	(201,016)		$	(2,403)		$	(357,434)		$	11	$	(560,842)


	Components of AOCI, Net of Tax
(In thousands)	Cumulative Foreign Exchange Translation Adjustments			Effective Portion of Derivatives Designated as Hedging Instruments			Cumulative Unrecognized Actuarial Losses on Pension Obligations			Unrealized Gain (Loss) on Marketable Securities		Total
Balance at December 31, 2023	$	(183,499)		$	(470)		$	(355,740)		$	15	$	(539,694)

OCI before reclassifications	(16,535)		(a)	2,865		(b)	2,310		(a)	2		(11,358)
Amounts reclassified from AOCI, net of tax	—			(1,002)			4,701			—		3,699



Total OCI	(16,535)			1,863			7,011			2		(7,659)
Less: OCI attributable to noncontrolling interests	821			—			—			—		821
OCI attributable to Enviri Corporation	(15,714)			1,863			7,011			2		(6,838)
Balance at March 31, 2024	$	(199,213)		$	1,393		$	(348,729)		$	17	$	(546,532)

(a) Principally foreign currency fluctuation.

(b) Net change from periodic revaluations.

Amounts reclassified from AOCI were as follows:


(In thousands)	Three Months Ended			Location on the Condensed Consolidated Statements of Operations
	March 31
		2024				2023



Amortization of cash flow hedging instruments:
Foreign currency exchange forward contracts		$	(404)	$	411	Product revenues



Interest rate swaps		(882)		(248)		Interest expense

Total before taxes		(1,286)		163
Income taxes		284		(39)
Total reclassification of cash flow hedging instruments, net of tax		$	(1,002)	$	124

Amortization of defined benefit pension items (c):
Actuarial losses		$	4,846	$	4,670	Defined benefit pension income (expense)
Prior service costs		118		114		Defined benefit pension income (expense)



Total before taxes		4,964		4,784
Income taxes		(263)		(292)
Total reclassification of defined benefit pension items, net of tax		$	4,701	$	4,492

(c) These AOCI components are included in the computation of net periodic pension costs. See Note 10, Employee Benefit Plans, for additional details.

Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Company has prepared these unaudited condensed consolidated financial statements in accordance with U.S. GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X of the SEC. Accordingly, the unaudited Condensed Consolidated Financial Statements do not include all information and disclosure required by U.S. GAAP for annual financial statements. The December 31, 2023 Condensed Consolidated Balance Sheet information contained in this Quarterly Report on Form 10-Q was derived from the 2023 audited consolidated financial statements. These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. In the opinion of management, all adjustments (all of which are of a normal recurring nature) that are necessary for a fair statement are reflected in these unaudited Condensed Consolidated Financial Statements.
Liquidity	Liquidity The Company’s cash flow forecasts, combined with existing cash and cash equivalents and borrowings available under the Senior Secured Credit Facilities, indicate sufficient liquidity to fund the Company’s operations for at least the next twelve months. As such, the Company’s unaudited Consolidated Financial Statements have been prepared on the basis that it will continue as a going concern for a period extending beyond twelve months from the date the unaudited Consolidated Financial Statements are issued. This assessment includes the expected ability to meet required financial covenants and the continued ability to draw down on the Senior Secured Credit Facilities (see Note 9, Debt and Credit Agreements).
Reclassifications	Reclassifications During the three months ended March 31, 2024, the Company determined that the held-for-sale criteria for Rail was no longer met and, as a result, the Company made reclassifications to prior year amounts previously classified as discontinued operations and assets held-for-sale in the Company's Consolidated Statements of Operations and Consolidated Balance Sheets, along with the accompanying notes to the Company's Consolidated Financial Statements. See Note 3, Discontinued Operations and Dispositions for further details.
Recently Adopted and Recently Issued Accounting Standards	Recently Adopted and Recently Issued Accounting Standards The Company has not adopted any accounting standards during the first quarter in 2024: The following accounting standards have been issued and become effective for the Company at a future date: In November 2023, the FASB issued changes that require expansion of annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. The changes become effective starting with the Company's annual financial statements for the year ended December 31, 2024. The Company is currently evaluating the impact that this change will have on the Company's disclosures. In December 2023, the FASB issued changes which require greater disaggregation of income tax disclosures related to the income tax rate reconciliation and income taxes paid. The changes become effective starting with the Company's annual financial statements for the year ended December 31, 2025. The guidance should be applied on a prospective basis with the option to apply the standard retrospectively. Early adoption is permitted. The Company is currently evaluating the impact that this change will have on the Company's disclosures.

Reconciliation of Basic and Diluted Shares (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Reconciliation of basic and diluted shares


	Three Months Ended
	March 31
(In thousands, except per share amounts)	2024		2023
Income (loss) from continuing operations attributable to Enviri Corporation common stockholders	$	(16,857)	$	(8,377)
Weighted-average shares outstanding:
Weighted-average shares outstanding - basic	79,945		79,633
Dilutive effect of stock-based compensation	—		—
Weighted-average shares outstanding - diluted	79,945		79,633

Earnings (loss) from continuing operations per common share, attributable to Enviri Corporation common stockholders:
Basic	$	(0.21)	$	(0.11)

Diluted	$	(0.21)	$	(0.11)

Schedule of antidilutive securities excluded from computation of earnings per share


	Three Months Ended
	March 31
(In thousands)		2024	2023
Restricted stock units		1,686	1,000

Stock appreciation rights		2,890	2,473
Performance share units		1,880	1,394

Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		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



	Three Months Ended
	March 31, 2023
(In thousands)	Harsco Environmental Segment		Clean Earth Segment		Harsco Rail Segment		Consolidated Totals
Primary Geographical Markets (a):
North America	$	78,473	$	222,464	$	44,162	$	345,099
Western Europe	101,386		—		13,187		114,573
Latin America (b)	40,955		—		604		41,559
Asia-Pacific	28,961		—		7,099		36,060
Middle East and Africa	18,405		—		—		18,405
Eastern Europe	5,009		—		—		5,009
Total Revenues	$	273,189	$	222,464	$	65,052	$	560,705


Key Product and Service Groups:
Environmental services related to resource recovery for metals manufacturing and related logistical services	$	229,361	$	—	$	—	$	229,361
Ecoproducts	38,402		—		—		38,402
Environmental systems for aluminum dross and scrap processing	5,426		—		—		5,426
Railway track maintenance equipment	—		—		29,444		29,444
After-market parts and services; safety and diagnostic technology	—		—		27,793		27,793
Railway contracting services	—		—		7,815		7,815
Hazardous waste processing solutions	—		186,112		—		186,112
Soil and dredged materials processing and reuse solutions	—		36,352		—		36,352
Total Revenues	$	273,189	$	222,464	$	65,052	$	560,705

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

(b) Includes Mexico.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, deferred income taxes	$ (481)	$ 1,472
Net gain (loss) on cash flow hedging instruments, deferred income taxes	(655)	847
Pension liability adjustments, deferred income taxes	(296)	(418)
Unrealized gain (loss) on marketable securities, deferred income taxes	$ (1)	$ 0

Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant and equipment ("PP&E") consist of the following:


(In thousands)	March 31 2024		December 31 2023
Land and improvements	$	92,269	$	93,793

Buildings and improvements	239,651		243,472
Machinery and equipment	1,690,555		1,729,637
Uncompleted construction	66,436		66,241
Gross property, plant and equipment	2,088,911		2,133,143
Less: Accumulated depreciation	(1,400,273)		(1,425,746)
Property, plant and equipment, net	$	688,638	$	707,397

Debt and Credit Agreements

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Debt and Credit Agreements

Long-term debt consists of the following:


(In thousands)	March 31 2024		December 31 2023

Senior Secured Credit Facilities:
New Term Loan	$	486,250	$	487,500


Revolving Credit Facility	457,000		422,000
5.75% Senior Notes	475,000		475,000
Other financing payable (including finance leases) in varying amounts	53,810		44,469
Total debt obligations	1,472,060		1,428,969
Less: deferred financing costs	(11,156)		(11,974)
Total debt obligations, net of deferred financing costs	1,460,904		1,416,995
Less: current maturities of long-term debt	(16,021)		(15,558)
Long-term debt	$	1,444,883	$	1,401,437

The Senior Secured Credit Facilities contain a consolidated net debt to Consolidated Adjusted EBITDA ratio covenant, which is not to exceed 5.25x for the quarter ended March 31, 2024 and then decreasing quarterly until reaching 4.00x on December 31, 2024. The total net leverage ratio covenant applicable to the third quarter of 2024 and earlier is subject to a 0.50x decrease upon the divestiture of Rail. The Company's required coverage of consolidated interest charges is set at a minimum of 2.75x through the end of 2024, subject to an increase to 3.00x upon closing of the divestiture of Rail, and 3.00x beginning with the first quarter of 2025.

At March 31, 2024, the Company was in compliance with its debt covenants under the Senior Secured Credit Facilities, with a total net debt to Consolidated Adjusted EBITDA ratio of 4.08x and a total interest coverage ratio of 3.06x. The Company believes it will continue to maintain compliance with these covenants based on its current outlook. However, the Company's estimates of compliance with these covenants could change in the future with a deterioration in economic conditions, higher than forecasted interest rate increases, the timing of working capital including the collection of receivables or an inability to realize increased pricing and implement cost reduction initiatives that mitigate the impacts of inflation and other factors that may adversely impact its realized operating margins.

Facility Fees and Debt-Related Income (Expense)

The components of the Condensed Consolidated Statements of Operations caption Facility fees and debt-related income (expense) were as follows:


	Three Months Ended
	March 31
(In thousands)	2024		2023

Unused debt commitment and amendment fees	$	—	$	(12)
Securitization and factoring fees	(2,789)		(2,351)
Facility fees and debt-related income (expense)	$	(2,789)	$	(2,363)

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
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-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I

+ Details

Reconciliation of Basic and Diluted Shares - Antidilutive Securities Excluded from Computation of Earnings per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restricted stock units
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	1,686	1,000
Stock appreciation rights
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	2,890	2,473
Performance share units
Antidilutive securities
Number of securities not included in computation of diluted earnings per share (in shares)	1,880	1,394

Reconciliation of Basic and Diluted Shares - Reconciliation of Basic and Diluted Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Income (loss) from continuing operations attributable to Enviri Corporation common stockholders	$ (16,857)	$ (8,377)
Weighted-average shares outstanding - basic (in shares)	79,945	79,633
Dilutive effect of stock-based compensation (in shares)	0	0
Weighted-average shares outstanding - diluted (in shares)	79,945	79,633
Earnings (loss) from continuing operations per common share, attributable to Enviri Corporation common stockholders:
Basic (in dollars per share)	$ (0.21)	$ (0.11)
Diluted (in dollars per share)	$ (0.21)	$ (0.11)

- Definition

Amount after tax of income (loss) from continuing operations attributable to the parent.

+ References

+ Details

- Definition

The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
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-Subparagraph (SX 210.7-04(19))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

- Definition

The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 250
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483443/250-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Components of Accumulated Other Comprehensive Loss - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 28,122	$ 24,995
Income (loss) from continuing operations before income taxes	(7,577)	708
Income tax benefit (expense) from continuing operations	7,915	8,017
Net income (loss)	(16,846)	(8,590)
Amount Reclassified from Accumulated Other Comprehensive Loss \| Cash flow hedging intruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before income taxes	(1,286)	163
Income tax benefit (expense) from continuing operations	284	(39)
Net income (loss)	(1,002)	124
Amount Reclassified from Accumulated Other Comprehensive Loss \| Cash flow hedging intruments \| Foreign currency exchange forward contracts
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Product revenues	(404)	411
Amount Reclassified from Accumulated Other Comprehensive Loss \| Cash flow hedging intruments \| Interest rate swaps
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(882)	(248)
Amount Reclassified from Accumulated Other Comprehensive Loss \| Defined benefit pension items
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before income taxes	4,964	4,784
Income tax benefit (expense) from continuing operations	(263)	(292)
Net income (loss)	4,701	4,492
Amount Reclassified from Accumulated Other Comprehensive Loss \| Actuarial losses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)	4,846	4,670
Amount Reclassified from Accumulated Other Comprehensive Loss \| Prior service costs
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)	$ 118	$ 114

Discontinued Operations and Dispositions- Schedule of Balance Sheet from Disposal of Harsco Rail Segment (Details) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Trade accounts receivable, net	$ 308,213	$ 338,187
Other receivables	33,693	40,565
Inventories	190,288	189,369
Current portion of contract assets	69,057	64,875
Other current assets	13,627	10,828
Property, plant and equipment, net	688,638	707,397
Right-of-use assets, net	102,278	102,891
Goodwill	771,404	780,978
Intangible assets, net	319,522	327,983
Deferred income tax assets	15,884	16,295
Other assets	100,030	91,798
Total assets	2,790,278	2,854,698
Accounts payable	224,509	243,279
Accrued compensation	52,947	79,609
Income taxes payable	5,172	7,567
Current portion of operating lease liabilities	28,569	28,775
Current portion of advances on contracts	35,965	38,313
Reserve for forward losses on contracts	46,592	52,919
Other current liabilities	162,415	174,342
Operating lease liabilities	75,151	75,476
Deferred tax liabilities	33,651	29,160
Other liabilities	42,567	47,215
Total liabilities	$ 2,244,154	2,279,290
Harsco Rail Segment \| Revision of Prior Period, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Trade accounts receivable, net		57,415
Other receivables		6,708
Inventories		103,077
Current portion of contract assets		56,341
Prepaid Expense		28,797
Other current assets		2,895
Property, plant and equipment, net		44,113
Right-of-use assets, net		7,050
Goodwill		13,026
Intangible assets, net		3,122
Deferred income tax assets		973
Other assets		22,792
Total assets		346,309
Accounts payable		44,703
Accrued compensation		6,056
Income taxes payable		1,434
Current portion of operating lease liabilities		3,656
Current portion of advances on contracts		32,912
Reserve for forward losses on contracts		52,725
Other current liabilities		30,550
Operating lease liabilities		3,331
Deferred tax liabilities		350
Other liabilities		494
Total liabilities		$ 176,211

Recently Adopted and Recently Issued Accounting Standards	3 Months Ended
	Mar. 31, 2024
Accounting Changes and Error Corrections [Abstract]
Recently Adopted and Recently Issued Accounting Standards	Recently Adopted and Recently Issued Accounting Standards The Company has not adopted any accounting standards during the first quarter in 2024: The following accounting standards have been issued and become effective for the Company at a future date: In November 2023, the FASB issued changes that require expansion of annual and interim disclosure requirements for reportable segments, primarily through enhanced disclosures about significant segment expenses. The changes become effective starting with the Company's annual financial statements for the year ended December 31, 2024. The Company is currently evaluating the impact that this change will have on the Company's disclosures. In December 2023, the FASB issued changes which require greater disaggregation of income tax disclosures related to the income tax rate reconciliation and income taxes paid. The changes become effective starting with the Company's annual financial statements for the year ended December 31, 2025. The guidance should be applied on a prospective basis with the option to apply the standard retrospectively. Early adoption is permitted. The Company is currently evaluating the impact that this change will have on the Company's disclosures.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 2
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+ Details

Other (Income) Expenses, Net

3 Months Ended

Mar. 31, 2024

Other Income and Expenses [Abstract]

Other (Income) Expenses, Net

The major components of this Condensed Consolidated Statements of Operations caption were as follows:


	Three Months Ended
	March 31
(In thousands)	2024		2023

Employee termination benefit costs	$	382	$	(26)

Other costs (income) for exit activities (a)	548		(5,728)






Net gains on sale of assets	(3,370)		(230)
Other	—		336
Other (income) expenses, net	$	(2,440)	$	(5,648)

Cover Page - shares	3 Months Ended
Cover Page - shares	Mar. 31, 2024	Apr. 30, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	001-03970
Entity Registrant Name	ENVIRI CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	23-1483991
Entity Address, Address Line One	Two Logan Square100-120 North 18th Street, 17th Floor,
Entity Address, City or Town	Philadelphia,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19103
City Area Code	267
Local Phone Number	857-8715
Title of 12(b) Security	Common stock, par value $1.25 per share
Trading Symbol	NVRI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		80,103,167
Entity Central Index Key	0000045876
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false

Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Finished goods	$ 16,430	$ 16,171
Work-in-process	10,715	13,081
Raw materials and purchased parts	116,073	114,046
Stores and supplies	47,070	46,071
Total inventories	$ 190,288	$ 189,369

Components of Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Components of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 575,408	$ 623,042
OCI before reclassifications	(11,358)	2,536
Amounts reclassified from AOCI, net of tax	3,699	4,616
Total other comprehensive income (loss)	(7,659)	7,152
Less: OCI attributable to noncontrolling interests	821	(358)
OCI attributable to Enviri Corporation	(6,838)	6,794
Ending balance	546,124	623,952
Cumulative Foreign Exchange Translation Adjustments
Components of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(183,499)	(213,104)
OCI before reclassifications	(16,535)	12,446
Amounts reclassified from AOCI, net of tax	0	0
Total other comprehensive income (loss)	(16,535)	12,446
Less: OCI attributable to noncontrolling interests	821	(358)
OCI attributable to Enviri Corporation	(15,714)	12,088
Ending balance	(199,213)	(201,016)
Effective Portion of Derivatives Designated as Hedging Instruments
Components of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(470)	157
OCI before reclassifications	2,865	(2,684)
Amounts reclassified from AOCI, net of tax	(1,002)	124
Total other comprehensive income (loss)	1,863	(2,560)
Less: OCI attributable to noncontrolling interests	0	0
OCI attributable to Enviri Corporation	1,863	(2,560)
Ending balance	1,393	(2,403)
Cumulative Unrecognized Actuarial Losses on Pension Obligations
Components of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(355,740)	(354,699)
OCI before reclassifications	2,310	(7,227)
Amounts reclassified from AOCI, net of tax	4,701	4,492
Total other comprehensive income (loss)	7,011	(2,735)
Less: OCI attributable to noncontrolling interests	0	0
OCI attributable to Enviri Corporation	7,011	(2,735)
Ending balance	(348,729)	(357,434)
Unrealized Gain (Loss) on Marketable Securities
Components of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	15	10
OCI before reclassifications	2	1
Amounts reclassified from AOCI, net of tax	0	0
Total other comprehensive income (loss)	2	1
Less: OCI attributable to noncontrolling interests	0	0
OCI attributable to Enviri Corporation	2	1
Ending balance	17	11
Accumulated Other Comprehensive Loss
Components of Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(539,694)	(567,636)
Total other comprehensive income (loss)	(6,838)	6,794
Ending balance	$ (546,532)	$ (560,842)

Property, Plant and Equipment - Components (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment
Gross property, plant and equipment	$ 2,088,911	$ 2,133,143
Less: Accumulated depreciation	(1,400,273)	(1,425,746)
Property, plant and equipment, net	688,638	707,397
Land
Property, Plant and Equipment
Gross property, plant and equipment	92,269	93,793
Buildings and improvements
Property, Plant and Equipment
Gross property, plant and equipment	239,651	243,472
Machinery and equipment
Property, Plant and Equipment
Gross property, plant and equipment	1,690,555	1,729,637
Uncompleted construction
Property, Plant and Equipment
Gross property, plant and equipment	$ 66,436	$ 66,241

Debt and Credit Agreements - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Debt obligation	$ 1,472,060	$ 1,428,969
Less: deferred financing costs	(11,156)	(11,974)
Total debt obligations, net of deferred financing costs	1,460,904	1,416,995
Current maturities of long-term debt	(16,021)	(15,558)
Long-term debt	1,444,883	1,401,437
Other financing payable (including finance leases) in varying amounts
Debt Instrument [Line Items]
Debt obligation	53,810	44,469
Term Loan Facility \| New Term Loan
Debt Instrument [Line Items]
Debt obligation	486,250	487,500
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt obligation	457,000	422,000
Senior Notes \| 5.75% Senior Notes
Debt Instrument [Line Items]
Debt obligation	$ 475,000	$ 475,000
Interest rate	5.75%

Accounts Receivable and Note Receivable - Schedule of Fair Value of Notes Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Receivables [Abstract]
Note receivable, at amortized cost	$ 14,300	$ 14,000
Note receivable, fair value	$ 15,800	$ 15,400

Accounts Receivable and Note Receivable - Schedule of Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Receivables [Abstract]
Trade accounts receivable	$ 322,102	$ 353,709
Less: Allowance for expected credit losses	(13,889)	(15,522)
Trade accounts receivable, net	308,213	338,187
Other receivables	$ 33,693	$ 40,565

Commitment and Contingencies (Tables)

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Loss Contingencies by Contingency

The following table summarizes information related to the location and undiscounted amount of the Company's environmental liabilities:


(In thousands)	March 31 2024		December 31 2023
Current portion of environmental liabilities (a)	$	7,395	$	7,540
Long-term environmental liabilities	25,253		25,682
Total environmental liabilities	$	32,648	$	33,222

(a) The current portion of environmental liabilities is included in the caption Other current liabilities on the Condensed Consolidated Balance Sheets.

Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Property, Plant and Equipment
Property, plant and equipment, net	$ 688,638	$ 707,397
Remeasurement of long-lived assets	$ 10,695	$ 10,700	$ 0

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 103,876	$ 121,239
Restricted cash	3,532	3,375
Trade accounts receivable, net	308,213	338,187
Other receivables	33,693	40,565
Inventories	190,288	189,369
Current portion of contract assets	69,057	64,875
Prepaid expenses	53,081	58,723
Current portion of assets held-for-sale	8,282	195
Other current assets	13,627	10,828
Total current assets	783,649	827,356
Property, plant and equipment, net	688,638	707,397
Right-of-use assets, net	102,278	102,891
Goodwill	771,404	780,978
Intangible assets, net	319,522	327,983
Deferred income tax assets	15,884	16,295
Assets held-for-sale	8,873	0
Other assets	100,030	91,798
Total assets	2,790,278	2,854,698
Current liabilities:
Short-term borrowings	3,251	14,871
Current maturities of long-term debt	16,021	15,558
Accounts payable	224,509	243,279
Accrued compensation	52,947	79,609
Income taxes payable	5,172	7,567
Reserve for forward losses on contracts	46,592	52,919
Current portion of advances on contracts	35,965	38,313
Current portion of operating lease liabilities	28,569	28,775
Current portion of liabilities of assets held-for-sale	2,342	0
Other current liabilities	162,415	174,342
Total current liabilities	577,783	655,233
Long-term debt	1,444,883	1,401,437
Retirement plan liabilities	44,866	45,087
Operating lease liabilities	75,151	75,476
Environmental liabilities	25,253	25,682
Deferred tax liabilities	33,651	29,160
Other liabilities	42,567	47,215
Total liabilities	2,244,154	2,279,290
COMMITMENTS AND CONTINGENCIES
HARSCO CORPORATION STOCKHOLDERS' EQUITY
Common stock	146,548	146,105
Additional paid-in capital	241,833	238,416
Accumulated other comprehensive loss	(546,532)	(539,694)
Retained earnings	1,510,358	1,528,320
Treasury stock	(851,266)	(849,996)
Total Enviri Corporation stockholders’ equity	500,941	523,151
Noncontrolling interests	45,183	52,257
Total equity	546,124	575,408
Total liabilities and equity	$ 2,790,278	$ 2,854,698

Revenue Recognition - Remaining Performance Obligation (Details) $ in Millions	Mar. 31, 2024 USD ($)
Harsco Environmental Segment
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 82.2
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 21.8
Period of expected timing of satisfaction	1 year
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 20.5
Period of expected timing of satisfaction	1 year
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 15.0
Period of expected timing of satisfaction	1 year
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 12.4
Period of expected timing of satisfaction	1 year
Harsco Environmental Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Period of expected timing of satisfaction
Harsco Rail Segment
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 140.7
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 53.4
Period of expected timing of satisfaction	1 year
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 61.0
Period of expected timing of satisfaction	1 year
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 22.6
Period of expected timing of satisfaction	1 year
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 3.7
Period of expected timing of satisfaction	1 year
Harsco Rail Segment \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Period of expected timing of satisfaction