CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (12,267)	$ (10,094)	$ (40,233)	$ (34,522)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes	22,985	(21,133)	(4,355)	1,902
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes	(3,670)	1,250	(1,679)	3,124
Pension liability adjustments, net of deferred income taxes	(11,125)	13,580	328	10,218
Unrealized gain (loss) on marketable securities, net of deferred income taxes	8	(4)	5	2
Total other comprehensive income (loss)	8,198	(6,307)	(5,701)	15,246
Total comprehensive income (loss)	(4,069)	(16,401)	(45,934)	(19,276)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(2,171)	(129)	(4,723)	4,812
Comprehensive income (loss) attributable to Enviri Corporation	$ (6,240)	$ (16,530)	$ (50,657)	$ (14,464)