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