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RECLAMATION LIABILITIES (Tables)
12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation [Abstract]  
Schedule of Change in Asset Retirement Obligation
Changes in Reclamation liabilities during the years ended December 31 were as follows (in thousands): 
2021 
2020
Balance, beginning of year $104,744 $80,838 
Liabilities assumed on the acquisition of Alacer (1)  
— 26,154 
Reclamation expenditures 
(243)(2,447)
Accretion expense  
4,821 3,815 
Additions, changes in estimate and other
15,722 (3,616)
Balance, end of year $125,044 $104,744 
Less: current portion (2,384)(2,023)
Non-current reclamation liabilities$122,660 $102,721 
(1)On September 16, 2020, the Company acquired Alacer, including Çöpler. Please refer to Note 3 for further details. The consideration included the assumption of reclamation liabilities of $26.2 million