CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (46,549)	$ (11,120)	$ (58,744)	$ (27,966)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes	22,947	(10,805)	38,670	(27,340)
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes	(1,800)	128	(4,597)	1,991
Pension liability adjustments, net of deferred income taxes	(11,122)	4,442	(15,328)	11,453
Unrealized gain (loss) on marketable securities, net of deferred income taxes	8	(5)	6	(3)
Total other comprehensive income (loss)	10,033	(6,240)	18,751	(13,899)
Total comprehensive income (loss)	(36,516)	(17,360)	(39,993)	(41,865)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(1,846)	(2,257)	(3,414)	(2,552)
Comprehensive income (loss) attributable to Enviri Corporation	$ (38,362)	$ (19,617)	$ (43,407)	$ (44,417)