Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Abstract]

Property, plant and equipment

Property, plant and equipment and mining properties, net consist of the following:

In thousands	September 30, 2025		December 31, 2024
Mine development	$	1,625,944	$	1,502,457
Mineral interests	1,683,564		833,564
Land	9,961		9,000
Facilities and equipment(1)	1,725,654		1,517,170
Construction in progress	130,588		145,732
Total	$	5,175,711	$	4,007,923
Accumulated depreciation, depletion and amortization(2)	(2,403,444)		(2,190,307)
Property, plant and equipment and mining properties, net	$	2,772,267	$	1,817,616

(1) Includes $151.4 million and $170.1 million associated with facilities and equipment assets under finance leases at September 30, 2025 and December 31, 2024, respectively.

(2) Includes $81.5 million and $63.3 million of accumulated amortization related to assets under finance leases at September 30, 2025 and December 31, 2024, respectively.