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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Tables)
 3 Months Ended
Mar. 31, 2025
Property, Plant and Equipment [Abstract]  
Schedule of Mineral Properties, Plant and Equipment
The components of Mineral properties, plant and equipment, net are as follows (in thousands):
March 31, 2025December 31, 2024
Plant and equipment (1)
$2,032,218 $1,883,193 
Construction in process
 157,625 135,594 
Mineral properties subject to depletion

2,293,647 2,114,765 
Mineral properties not yet subject to depletion
 892,532 884,029 
Exploration and evaluation assets

247,164 254,146 
Total mineral properties, plant, and equipment 5,623,186 5,271,727 
Accumulated depreciation, plant and equipment

(830,356)(804,411)
Accumulated depletion, mineral properties(700,338)(684,449)
Mineral properties, plant, and equipment, net$4,092,492 $3,782,867 
(1)As of March 31, 2025 and December 31, 2024, plant and equipment includes finance lease right-of-use assets with a carrying amount of $77.4 million and $78.9 million, respectively.