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Reclamation
 3 Months Ended
Mar. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]  
RECLAMATION RECLAMATION
Reclamation and mine closure costs are based principally on legal and regulatory requirements. Management estimates costs associated with reclamation of mining properties. On an ongoing basis, management evaluates its estimates and assumptions, and future expenditures could differ from current estimates.
Changes to the Company’s asset retirement obligations are as follows:
Three Months Ended March 31,
In thousands20222021
Asset retirement obligation - Beginning$181,888 $139,274 
Accretion3,457 2,908 
Settlements(1,019)(770)
Asset retirement obligation - Ending$184,326 $141,412