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Property, Plant and Equipment (Tables)
 9 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
Property, plant and equipment and mining properties, net consist of the following:
In thousandsSeptember 30, 2024December 31, 2023
Mine development$1,420,316 $1,358,189 
Mineral interests833,564 809,912 
Land9,000 8,318 
Facilities and equipment(1)
1,479,018 947,435 
Construction in progress(2)
170,256 612,865 
Total$3,912,154 $3,736,719 
Accumulated depreciation, depletion and amortization(3)
(2,152,700)(2,048,431)
Property, plant and equipment and mining properties, net$1,759,454 $1,688,288 
(1) Includes $149.2 million and $127.6 million associated with facilities and equipment assets under finance leases at September 30, 2024 and December 31, 2023, respectively.
(2) Includes $471.7 million of construction costs related to the Rochester expansion project at December 31, 2023.
(3) Includes $54.1 million and $37.6 million of accumulated amortization related to assets under finance leases at September 30, 2024 and December 31, 2023, respectively.