CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (11,120)	$ (15,838)	$ (27,966)	$ (24,428)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes	(10,805)	10,589	(27,340)	23,035
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes	128	4,434	1,991	1,874
Pension liability adjustments, net of deferred income taxes	4,442	(627)	11,453	(3,362)
Unrealized gain (loss) on marketable securities, net of deferred income taxes	(5)	5	(3)	6
Total other comprehensive income (loss)	(6,240)	14,401	(13,899)	21,553
Total comprehensive income (loss)	(17,360)	(1,437)	(41,865)	(2,875)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(2,257)	6,234	(2,552)	4,941
Comprehensive income (loss) attributable to Enviri Corporation	$ (19,617)	$ 4,797	$ (44,417)	$ 2,066