CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (10,094)	$ 2,881	$ (34,522)	$ (140,295)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes	(21,133)	(54,914)	1,902	(116,407)
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes	1,250	1,143	3,124	3,003
Pension liability adjustments, net of deferred income taxes	13,580	28,163	10,218	70,691
Unrealized gain (loss) on marketable securities, net of deferred income taxes	(4)	(7)	2	(20)
Total other comprehensive income (loss)	(6,307)	(25,615)	15,246	(42,733)
Total comprehensive income (loss)	(16,401)	(22,734)	(19,276)	(183,028)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(129)	1,921	4,812	3,052
Comprehensive income (loss) attributable to Enviri Corporation	$ (16,530)	$ (20,813)	$ (14,464)	$ (179,976)