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Reclamation
 9 Months Ended
Sep. 30, 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 September 30,Nine Months Ended September 30,
In thousands2022202120222021
Asset retirement obligation - Beginning$184,606 $143,229 $180,156 $139,274 
Accretion3,564 3,027 10,482 8,898 
Settlements(1,507)(1,501)(3,975)(3,417)
Asset retirement obligation - Ending$186,663 $144,755 $186,663 $144,755