v3.26.1
REVENUE - Narrative (Details) - Concentrate Metal Sales Agreement
oz in Millions, lb in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
$ / pound
$ / ounce
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
lb
oz
$ / pound
$ / ounce
Jun. 30, 2025
USD ($)
Disaggregation of Revenue [Line Items]        
Embedded derivative, increase of value | $ $ 2.6 $ 2.0 $ 11.5 $ 3.6
Silver        
Disaggregation of Revenue [Line Items]        
Notional ounce/pound | oz     4.0  
Average price per ounce/pound (in dollars per ounce/pound) | $ / ounce 74.79   74.79  
Lead        
Disaggregation of Revenue [Line Items]        
Notional ounce/pound | lb     18.2  
Average price per ounce/pound (in dollars per ounce/pound) | $ / pound 0.88   0.88  
Zinc        
Disaggregation of Revenue [Line Items]        
Notional ounce/pound | lb     2.6  
Average price per ounce/pound (in dollars per ounce/pound) | $ / pound 1.50   1.50