CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (163,709)	$ (124,339)	$ (84,939)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of deferred income taxes of $4,616, $(836) and $3,162 in 2025, 2024 and 2023, respectively	32,045	(46,106)	28,111
Net gain (loss) on cash flow hedging instruments, net of deferred income taxes of $922, $(1,398) and $138 in 2025, 2024 and 2023, respectively	(3,754)	4,239	(627)
Pension liability adjustments, net of deferred income taxes of $(1,397), $(5,937) and $(2,693) in 2025, 2024 and 2023, respectively	(3,531)	45,240	(2,461)
Unrealized gain (loss) on marketable securities, net of deferred income taxes of $(1), $(2) and $(2) in 2025, 2024 and 2023, respectively	3	7	5
Other Comprehensive Income (Loss), Net of Tax, Total	24,763	3,380	25,028
Total comprehensive income (loss)	(138,946)	(120,959)	(59,911)
Less: Comprehensive (income) loss attributable to noncontrolling interests	(5,751)	(4,084)	2,594
Comprehensive income (loss) attributable to Enviri Corporation	$ (144,697)	$ (125,043)	$ (57,317)