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MINERAL PROPERTIES AND PROPERTY, PLANT AND EQUIPMENT (Schedule Related to Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance $ 1,574,212  
Net Book Value 1,539,187 $ 1,574,212
Ending Balance 1,539,187 1,574,212
Deferred tax liability (31,163) (16,899)
Gross carrying amount [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance 2,770,323 2,438,696
Acquisition of Roxgold   59,144
Additions 227,766 275,821
Changes in closure and reclamation provision 2,845 9,559
Disposals and write-offs (20,623) (12,897)
Ending Balance 2,980,311 2,770,323
Accumulated depreciation, amortisation and impairment [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance (1,196,111) (871,075)
Disposals and write-offs (5,341) (6,650)
Impairment   90,615
Depletion and depreciation 250,354 241,071
Ending Balance (1,441,124) (1,196,111)
Mining property [member] | Depletable [member]    
Mineral Properties, and Property, Plant and Equipment    
Net Book Value 714,787 817,087
Mining property [member] | Depletable [member] | Gross carrying amount [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance 1,540,342 866,999
Additions 82,553 100,366
Changes in closure and reclamation provision 2,890 9,407
Disposals and write-offs   (142)
Transfers (10,612) 563,712
Ending Balance 1,615,173 1,540,342
Mining property [member] | Depletable [member] | Accumulated depreciation, amortisation and impairment [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance (723,255) (506,268)
Disposals and write-offs   (40)
Impairment   60,602
Depletion and depreciation 177,131 156,425
Ending Balance (900,386) (723,255)
Mining property [member] | Non Depletable [member]    
Mineral Properties, and Property, Plant and Equipment    
Net Book Value 272,610 244,235
Deferred tax liability 1,600  
Mining property [member] | Non Depletable [member] | Gross carrying amount [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance 244,235 712,269
Acquisition of Roxgold   58,862
Additions 29,165 39,835
Disposals and write-offs (14,485) (5,883)
Transfers 13,695 (560,848)
Ending Balance 272,610 244,235
Construction in progress [member]    
Mineral Properties, and Property, Plant and Equipment    
Net Book Value 73,843 44,169
Construction in progress [member] | Gross carrying amount [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance 44,218 154,647
Additions 74,018 111,690
Transfers (44,344) (222,119)
Ending Balance 73,892 44,218
Construction in progress [member] | Accumulated depreciation, amortisation and impairment [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance (49)  
Impairment   49
Ending Balance (49) (49)
Other property, plant and equipment [member]    
Mineral Properties, and Property, Plant and Equipment    
Net Book Value 477,947 468,721
Other property, plant and equipment [member] | Gross carrying amount [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance 941,528 704,781
Acquisition of Roxgold   282
Additions 42,030 23,930
Changes in closure and reclamation provision (45) 152
Disposals and write-offs (6,138) (6,872)
Transfers 41,261 219,255
Ending Balance 1,018,636 941,528
Other property, plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]    
Mineral Properties, and Property, Plant and Equipment    
Beginning Balance (472,807) (364,807)
Disposals and write-offs (5,341) (6,610)
Impairment   29,964
Depletion and depreciation 73,223 84,646
Ending Balance $ (540,689) $ (472,807)