CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (122,661)	$ (88,098)	$ (176,431)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes of $(836), $3,162 and $(6,752) in 2024, 2023 and 2022, respectively	(46,424)	28,988	(82,325)
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes of $(1,398), $138 and $(1,284) in 2024, 2023 and 2022, respectively	4,239	(627)	3,181
Pension liability adjustments, net of deferred income taxes of $(5,937), $(2,693) and $(2,590) in 2024, 2023 and 2022, respectively	41,683	(1,041)	67,549
Unrealized gain (loss) on marketable securities, net of deferred income taxes of $(2), $(2) and $4 in 2024, 2023 and 2022, respectively	7	5	(12)
Other Comprehensive Income (Loss), Net of Tax, Total	(495)	27,325	(11,607)
Total comprehensive income (loss)	(123,156)	(60,773)	(188,038)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(4,084)	2,594	472
Comprehensive income (loss) attributable to Enviri Corporation	$ (127,240)	$ (58,179)	$ (187,566)