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Reclamation (Tables)
 6 Months Ended
Jun. 30, 2024
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 June 30,Six Months Ended June 30,
In thousands2024202320242023
Asset retirement obligation - Beginning$216,989 $205,380 $214,013 $202,431 
Accretion4,154 4,073 8,230 8,066 
Settlements(1,226)(1,493)(2,326)(2,537)
Asset retirement obligation - Ending$219,917 $207,960 $219,917 $207,960