v3.26.1
MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Tables)
 6 Months Ended
Jun. 30, 2026
Property, Plant, and Equipment [Abstract]  
Schedule of Mineral Properties, Plant and Equipment, Net
The components of Mineral properties, plant and equipment, net are as follows (in thousands):
June 30, 2026December 31, 2025
Plant and equipment (1)
$1,154,150 $1,084,113 
Construction in process
85,903 67,469 
Mineral properties subject to depletion
880,393 833,213 
Mineral properties not yet subject to depletion
65,070 74,608 
Exploration and evaluation assets
81,639 89,466 
Total mineral properties, plant, and equipment2,267,155 2,148,869 
Accumulated depreciation, plant and equipment
(694,415)(658,074)
Accumulated depletion, mineral properties(491,165)(466,380)
Mineral properties, plant, and equipment, net$1,081,575 $1,024,415 
(1)As of June 30, 2026 and December 31, 2025, plant and equipment includes finance lease right-of-use assets with a carrying amount of $0.2 million and $0.5 million, respectively.