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Reclamation (Tables)
 9 Months Ended
Sep. 30, 2025
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligation
Changes to the Company’s asset retirement obligations for its operating sites are as follows:
Three Months Ended September 30,Nine Months Ended September 30,
In thousands2025202420252024
Asset retirement obligation - Beginning$275,032 $219,917 $260,492 $214,013 
Accretion4,988 4,233 14,620 12,463 
Additions and changes to estimates— — 8,644 — 
Settlements(3,796)(2,060)(7,532)(4,386)
Asset retirement obligation - Ending$276,224 $222,090 $276,224 $222,090