CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (15,838)	$ (104,496)	$ (24,428)	$ (143,176)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes	10,589	(58,646)	23,035	(61,493)
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes	4,434	720	1,874	1,860
Pension liability adjustments, net of deferred income taxes	(627)	28,810	(3,362)	42,528
Unrealized gain (loss) on marketable securities, net of deferred income taxes	5	(10)	6	(13)
Total other comprehensive income (loss)	14,401	(29,126)	21,553	(17,118)
Total comprehensive income (loss)	(1,437)	(133,622)	(2,875)	(160,294)
Less: Comprehensive (income) loss attributable to noncontrolling interests	6,234	1,808	4,941	1,131
Comprehensive income (loss) attributable to Enviri Corporation	$ 4,797	$ (131,814)	$ 2,066	$ (159,163)