CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues from continuing operations:
Total revenues	$ 562,254	$ 609,993	$ 1,110,538	$ 1,210,310
Costs and expenses from continuing operations:
Selling, general and administrative expenses	95,503	90,454	184,611	177,580
Research and development expenses	995	943	1,462	1,804
Property, plant and equipment impairment charge	7,386	0	7,386	0
Remeasurement of long-lived assets	0	0	0	10,695
Gain on sale of businesses, net	0	(1,877)	0	(1,877)
Other expense (income), net	2,411	6,160	6,702	3,720
Total costs and expenses	569,445	578,738	1,087,074	1,153,242
Operating income (loss) from continuing operations	(7,191)	31,255	23,464	57,068
Interest income	470	3,435	924	5,132
Interest expense	(27,600)	(27,934)	(54,174)	(56,056)
Facility fees and debt-related income (expense)	(2,619)	(2,920)	(5,231)	(5,709)
Defined benefit pension income (expense)	(5,387)	(4,166)	(10,420)	(8,342)
Income (loss) from continuing operations before income taxes and equity in income	(42,327)	(330)	(45,437)	(7,907)
Income tax benefit (expense) from continuing operations	(3,609)	(10,020)	(11,555)	(17,935)
Equity in income (loss) of unconsolidated entities, net	44	127	72	(122)
Income (loss) from continuing operations	(45,892)	(10,223)	(56,920)	(25,964)
Discontinued operations:
Income (loss) from discontinued businesses	(889)	(1,211)	(2,468)	(2,703)
Income tax benefit (expense) from discontinued businesses	232	314	644	701
Income (loss) from discontinued operations, net of tax	(657)	(897)	(1,824)	(2,002)
Net income (loss)	(46,549)	(11,120)	(58,744)	(27,966)
Less: Net loss (income) attributable to noncontrolling interests	(1,058)	(2,481)	(2,259)	(3,597)
Net income (loss) attributable to Enviri Corporation	(47,607)	(13,601)	(61,003)	(31,563)
Amounts attributable to Enviri Corporation common stockholders:
Income (loss) from continuing operations, net of tax	(46,950)	(12,704)	(59,179)	(29,561)
Income (loss) from discontinued operations, net of tax	(657)	(897)	(1,824)	(2,002)
Net income (loss) attributable to Enviri Corporation	$ (47,607)	$ (13,601)	$ (61,003)	$ (31,563)
Weighted-average shares of common stock outstanding (in shares)	80,629	80,146	80,481	80,045
Basic earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.58)	$ (0.16)	$ (0.74)	$ (0.37)
Discontinued operations (in dollars per share)	(0.01)	(0.01)	(0.02)	(0.03)
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.59)	$ (0.17)	$ (0.76)	$ (0.39)
Diluted weighted-average shares of common stock outstanding (in shares)	80,629	80,146	80,481	80,045
Diluted earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.58)	$ (0.16)	$ (0.74)	$ (0.37)
Discontinued operations (in dollars per share)	(0.01)	(0.01)	(0.02)	(0.03)
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.59)	$ (0.17)	$ (0.76)	$ (0.39)
Product Revenues
Revenues from continuing operations:
Total revenues	$ 57,013	$ 104,710	$ 128,457	$ 205,873
Costs and expenses from continuing operations:
Cost of services and products sold	68,339	91,996	119,700	177,406
Service Revenues
Revenues from continuing operations:
Total revenues	505,241	505,283	982,081	1,004,437
Costs and expenses from continuing operations:
Cost of services and products sold	$ 394,811	$ 388,222	$ 767,213	$ 781,074