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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET (Tables)
 9 Months Ended
Sep. 30, 2024
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):
September 30, 2024December 31, 2023
Plant and equipment (1)
$1,870,780 $1,889,634 
Construction in process
 118,836 86,304 
Mineral properties subject to depletion

2,105,666 2,085,678 
Mineral properties not yet subject to depletion
 884,085 878,712 
Exploration and evaluation assets

253,841 253,842 
Total mineral properties, plant, and equipment 5,233,208 5,194,170 
Accumulated depreciation, plant and equipment

(778,122)(714,579)
Accumulated depletion, mineral properties(657,415)(606,705)
Mineral properties, plant, and equipment, net$3,797,671 $3,872,886 
(1)As of September 30, 2024 and December 31, 2023, plant and equipment includes finance lease right-of-use assets with a carrying amount of $81.0 million and $84.7 million, respectively.