Property, Plant and Equipment (Tables)

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Property, plant and equipment

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

In thousands	March 31, 2024		December 31, 2023
Mine development	$	1,377,235	$	1,358,189
Mineral interests	809,912		809,912
Land	9,000		8,318
Facilities and equipment(1)	1,416,594		947,435
Construction in progress(2)	162,191		612,865
Total	$	3,774,932	$	3,736,719
Accumulated depreciation, depletion and amortization(3)	(2,077,005)		(2,048,431)
Property, plant and equipment and mining properties, net	$	1,697,927	$	1,688,288

(1) Includes $120.8 million and $127.6 million associated with facilities and equipment assets under finance leases at March 31, 2024 and December 31, 2023, respectively.

(2) Includes $18.0 million and $471.7 million of construction costs related to the Rochester Expansion project at March 31, 2024 and December 31, 2023, respectively.

(3) Includes $40.1 million and $37.6 million of accumulated amortization related to assets under finance leases at March 31, 2024 and December 31, 2023, respectively.