CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues from continuing operations:
Total revenues	$ 2,342,645	$ 2,366,020	$ 2,133,981
Costs and expenses from continuing operations:
Cost of services and products sold			1,799,483
Selling, general and administrative costs	359,388	353,985	304,865
Research and development expenses	3,961	3,458	2,858
Goodwill and other intangible asset impairment charges	15,866	0	119,580
Property, plant and equipment impairment charge	23,444	14,099	0
Remeasurement of long-lived assets	10,695	0	0
Gain (Loss) on Disposition of Business	(10,478)	0	0
Other expenses	5,437	(1,591)	11,654
Total costs and expenses	2,310,900	2,286,082	2,234,877
Operating income (loss) from continuing operations	31,745	79,938	(100,896)
Interest income	6,795	6,809	3,829
Interest expense	(112,217)	(107,081)	(76,807)
Facility fees and debt-related income (expense)	(11,265)	(10,762)	(2,956)
Defined benefit pension income (expense)	(16,728)	(21,574)	8,933
Income (loss) from continuing operations before income taxes and equity income	(101,670)	(52,670)	(167,897)
Income tax expense	(17,066)	(30,866)	(4,856)
Equity income (loss) of unconsolidated entities, net	(10)	(761)	(178)
Income (loss) from continuing operations	(118,746)	(84,297)	(172,931)
Discontinued operations:
Income (loss) from discontinued businesses	(5,297)	(5,133)	(5,364)
Income tax benefit (expense) from discontinued businesses	1,382	1,332	1,864
Income (loss) from discontinued operations, net of tax	(3,915)	(3,801)	(3,500)
Net income (loss)	(122,661)	(88,098)	(176,431)
Less: Net income attributable to noncontrolling interests	(5,312)	1,977	(3,638)
Net income (loss) attributable to Enviri Corporation	(127,973)	(86,121)	(180,069)
Amounts attributable to Harsco Corporation common stockholders:
Income (loss) from continuing operations, net of tax	(124,058)	(82,320)	(176,569)
Income (loss) from discontinued operations, net of tax	(3,915)	(3,801)	(3,500)
Net income (loss) attributable to Enviri Corporation common stockholders	$ (127,973)	$ (86,121)	$ (180,069)
Weighted average shares of common stock outstanding	80,118	79,796	79,493
Basic earnings (loss) per share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (1.55)	$ (1.03)	$ (2.22)
Discontinued operations (in dollars per share)	(0.05)	(0.05)	(0.04)
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (1.60)	$ (1.08)	$ (2.27)
Diluted weighted average shares of stock outstanding	80,118	79,796	79,493
Diluted earnings (loss) per share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (1.55)	$ (1.03)	$ (2.22)
Discontinued operations (in dollars per share)	(0.05)	(0.05)	(0.04)
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (1.60)	$ (1.08)	$ (2.27)
Services
Revenues from continuing operations:
Total revenues	$ 1,970,193	$ 1,931,712	$ 1,757,583
Costs and expenses from continuing operations:
Cost of services and products sold	1,557,473	1,511,689	1,438,421
Product
Revenues from continuing operations:
Total revenues	372,452	434,308	376,398
Costs and expenses from continuing operations:
Cost of services and products sold	$ 345,114	$ 404,442	$ 357,499