CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues from continuing operations:
Total revenues	$ 573,627	$ 596,968	$ 1,783,937	$ 1,766,689
Costs and expenses from continuing operations:
Selling, general and administrative expenses	89,183	93,513	266,763	262,175
Research and development expenses	888	902	2,692	2,441
Impairment of Long-Lived Assets to be Disposed of	0	0	0	14,099
Remeasurement of long-lived assets	0	0	10,695	0
Gain on sale of businesses, net	(8,601)	0	(10,478)	0
Other expense (income), net	40	2,865	6,600	(4,052)
Total costs and expenses	536,255	568,208	1,689,497	1,672,327
Operating income (loss) from continuing operations	37,372	28,760	94,440	94,362
Interest income	981	1,722	6,113	4,796
Interest expense	(28,813)	(27,552)	(84,869)	(78,956)
Facility fees and debt-related income (expense)	(2,978)	(2,806)	(8,687)	(7,899)
Defined benefit pension income (expense)	(4,257)	(5,430)	(12,599)	(16,159)
Income (loss) from continuing operations before income taxes and equity income	2,305	(5,306)	(5,602)	(3,856)
Income tax benefit (expense) from continuing operations	(13,437)	(3,498)	(31,372)	(26,846)
Equity income (loss) of unconsolidated entities, net	38	(151)	(84)	(593)
Income (loss) from continuing operations	(11,094)	(8,955)	(37,058)	(31,295)
Discontinued operations:
Income (loss) from discontinued businesses	(1,584)	(1,538)	(4,287)	(4,358)
Income tax benefit (expense) from discontinued businesses	411	399	1,112	1,131
Income (loss) from discontinued operations, net of tax	(1,173)	(1,139)	(3,175)	(3,227)
Net income (loss)	(12,267)	(10,094)	(40,233)	(34,522)
Less: Net loss (income) attributable to noncontrolling interests	(901)	(708)	(4,498)	2,756
Net income (loss) attributable to Enviri Corporation	(13,168)	(10,802)	(44,731)	(31,766)
Amounts attributable to Enviri Corporation common stockholders:
Income (loss) from continuing operations, net of tax	(11,995)	(9,663)	(41,556)	(28,539)
Income (loss) from discontinued operations, net of tax	(1,173)	(1,139)	(3,175)	(3,227)
Net income (loss) attributable to Enviri Corporation	$ (13,168)	$ (10,802)	$ (44,731)	$ (31,766)
Weighted-average shares of common stock outstanding (in shares)	80,165	79,850	80,085	79,767
Basic earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.15)	$ (0.12)	$ (0.52)	$ (0.36)
Discontinued operations (in dollars per share)	(0.01)	(0.01)	(0.04)	(0.04)
Basic earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.16)	$ (0.14)	$ (0.56)	$ (0.40)
Diluted weighted-average shares of common stock outstanding (in shares)	80,165	79,850	80,085	79,767
Diluted earnings (loss) per common share attributable to Enviri Corporation common stockholders:
Continuing operations (in dollars per share)	$ (0.15)	$ (0.12)	$ (0.52)	$ (0.36)
Discontinued operations (in dollars per share)	(0.01)	(0.01)	(0.04)	(0.04)
Diluted earnings (loss) per share attributable to Harsco Corporation common stockholders (in dollars per share)	$ (0.16)	$ (0.14)	$ (0.56)	$ (0.40)
Product Revenues
Revenues from continuing operations:
Total revenues	$ 85,495	$ 106,177	$ 291,368	$ 332,375
Costs and expenses from continuing operations:
Cost of services and products sold	80,821	93,389	258,227	277,086
Service Revenues
Revenues from continuing operations:
Total revenues	488,132	490,791	1,492,569	1,434,314
Costs and expenses from continuing operations:
Cost of services and products sold	$ 373,924	$ 377,539	$ 1,154,998	$ 1,120,578