v3.26.1
Basis of Presentation - Revision of Statements of Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net income (loss) $ (394,510) $ (9,538) $ (46,755) $ (7,812) $ (404,048) $ (54,566)
Other comprehensive income (loss):            
Foreign currency translation adjustments, net of deferred income taxes 10,161   21,802   3,783 36,903
Pension liability adjustments, net of deferred income taxes 3,319   (11,050)   13,229 (15,238)
Total other comprehensive income (loss) 14,958 $ 4,788 8,960 8,114 19,746 17,074
Total comprehensive income (loss) (379,552)   (37,795)   (384,302) (37,492)
Comprehensive income (loss) attributable to Enviri Corporation $ (381,489)   (39,641)   $ (387,446) (40,906)
As Previously Reported            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net income (loss)     (46,549) (12,195)   (58,744)
Other comprehensive income (loss):            
Foreign currency translation adjustments, net of deferred income taxes     22,947     38,670
Pension liability adjustments, net of deferred income taxes     (11,122)     (15,328)
Total other comprehensive income (loss)     10,033 8,718   18,751
Total comprehensive income (loss)     (36,516)     (39,993)
Comprehensive income (loss) attributable to Enviri Corporation     (38,362)     (43,407)
Revision Adjustment            
Error Corrections and Prior Period Adjustments Restatement [Line Items]            
Net income (loss)     (206) 4,383   4,178
Other comprehensive income (loss):            
Foreign currency translation adjustments, net of deferred income taxes     (1,145)     (1,767)
Pension liability adjustments, net of deferred income taxes     72     90
Total other comprehensive income (loss)     (1,073) $ (604)   (1,677)
Total comprehensive income (loss)     (1,279)     2,501
Comprehensive income (loss) attributable to Enviri Corporation     $ (1,279)     $ 2,501