December 31, 

(In thousands)

2025

  ​ ​ ​

2024

Plant and equipment

$

390,359

$

331,899

Mining property and mineral rights

139,077

120,532

Construction in process

 

22,264

 

31,048

Capitalized mine development costs

 

221,852

 

199,595

Less: accumulated depreciation, depletion, and amortization

 

(261,609)

 

(201,055)

Total property, plant, and equipment, net

$

511,943

$

482,019

Historical Timeline

Fiscal YearFiled
2025Feb 26, 2026Showing above
2024Mar 17, 2025
2023Mar 14, 2024
2022Mar 14, 2023
2021Apr 1, 2022
2020Feb 18, 2021
2019Feb 20, 2020
2018Mar 19, 2019
2017Mar 21, 2018

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.