CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues from continuing operations:
Total revenues	$ 548,284	$ 600,317
Costs and expenses from continuing operations:
Selling, general and administrative expenses	89,108	87,126
Research and development expenses	467	861
Remeasurement of long-lived assets	0	10,695
Other expense (income), net	4,291	(2,440)
Total costs and expenses	517,629	574,504
Operating income (loss) from continuing operations	30,655	25,813
Interest income	454	1,697
Interest expense	(26,574)	(28,122)
Facility fees and debt-related income (expense)	(2,612)	(2,789)
Defined benefit pension income (expense)	(5,033)	(4,176)
Income (loss) from continuing operations before income taxes and equity in income	(3,110)	(7,577)
Income tax benefit (expense) from continuing operations	(7,946)	(7,915)
Equity in income (loss) of unconsolidated entities, net	28	(249)
Income (loss) from continuing operations	(11,028)	(15,741)
Discontinued operations:
Income (loss) from discontinued businesses	(1,579)	(1,492)
Income tax benefit (expense) from discontinued businesses	412	387
Income (loss) from discontinued operations, net of tax	(1,167)	(1,105)
Net income (loss)	(12,195)	(16,846)
Less: Net loss (income) attributable to noncontrolling interests	(1,201)	(1,116)
Net income (loss) attributable to Enviri Corporation	(13,396)	(17,962)
Amounts attributable to Enviri Corporation common stockholders:
Income (loss) from continuing operations, net of tax	(12,229)	(16,857)
Income (loss) from discontinued operations, net of tax	(1,167)	(1,105)
Net income (loss) attributable to Enviri Corporation	$ (13,396)	$ (17,962)
Weighted-average shares of common stock outstanding (in shares)	80,331	79,945
Basic earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.15)	$ (0.21)
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)	$ (0.17)	$ (0.22)
Diluted weighted-average shares of common stock outstanding (in shares)	80,331	79,945
Diluted earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.15)	$ (0.21)
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)	$ (0.17)	$ (0.22)
Product Revenues
Revenues from continuing operations:
Total revenues	$ 71,444	$ 101,163
Costs and expenses from continuing operations:
Cost of services and products sold	51,361	85,410
Service Revenues
Revenues from continuing operations:
Total revenues	476,840	499,154
Costs and expenses from continuing operations:
Cost of services and products sold	$ 372,402	$ 392,852