Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2024

Property, Plant and Equipment [Abstract]

Property, plant and equipment

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

In thousands	June 30, 2024		December 31, 2023
Mine development	$	1,394,378	$	1,358,189
Mineral interests	809,912		809,912
Land	9,000		8,318
Facilities and equipment(1)	1,444,949		947,435
Construction in progress(2)	153,476		612,865
Total	$	3,811,715	$	3,736,719
Accumulated depreciation, depletion and amortization(3)	(2,115,764)		(2,048,431)
Property, plant and equipment and mining properties, net	$	1,695,951	$	1,688,288

(1) Includes $119.8 million and $127.6 million associated with facilities and equipment assets under finance leases at June 30, 2024 and December 31, 2023, respectively.

(2) Includes $3.5 million and $471.7 million of construction costs related to the Rochester expansion project at June 30, 2024 and December 31, 2023, respectively.

(3) Includes $47.0 million and $37.6 million of accumulated amortization related to assets under finance leases at June 30, 2024 and December 31, 2023, respectively.