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MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET
 9 Months Ended
Sep. 30, 2022
Property, Plant and Equipment [Abstract]  
MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET MINERAL PROPERTIES, PLANT AND EQUIPMENT, NET
The components of Mineral properties, plant and equipment, net are as follows (in thousands):
September 30, 2022December 31, 2021
Plant and equipment (1)
$1,776,441 $1,762,833 
Construction in process
 50,853 36,841 
Mineral properties subject to depletion

1,411,884 1,331,615 
Mineral properties not yet subject to depletion
 668,356 141,629 
Exploration and evaluation assets

345,511 927,176 
Total mineral properties, plant, and equipment 4,253,045 4,200,094 
Accumulated depreciation, plant and equipment

(594,008)(529,635)
Accumulated depreciation, mineral properties(468,101)(420,695)
Mineral properties, plant, and equipment, net$3,190,936 $3,249,764 
(1) As of September 30, 2022 and December 31, 2021, plant and equipment includes finance lease right-of-use assets with a carrying amount of $103.0 million and $114.9 million, respectively.
No impairment was recognized for the three and nine months ended September 30, 2022. During the nine month period ended September 30, 2021, the Company recognized an impairment loss of $22.4 million as a result of the agreement entered into subsequent to June 30, 2021 to sell a portfolio of royalty interests and deferred payments (the “Royalty Sales Agreement”) to EMX Royalty Corporation (“EMX”). The $22.4 million impairment loss was recognized in the Company's Exploration, evaluation and development properties segment.