XML 86 R55.htm IDEA: XBRL DOCUMENT v3.19.1
Mining interests - Schedule of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment $ 2,035,097 $ 2,124,133 $ 1,950,356
Investments in joint ventures (accounted for using the equity method) 72,078 65,830  
Total property, plant and equipment and joint ventures accounted for using the equity method 2,107,175 2,189,963 2,004,080
Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 1,881,768 1,972,451 856,172
Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 152,649 150,971 123,962
Office, furniture and equipment, net      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 680 711 487
Cost      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 3,113,126 2,909,819 2,546,361
Total property, plant and equipment and joint ventures accounted for using the equity method 3,185,204 2,975,649 2,600,085
Cost | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 2,957,959 2,756,584 1,450,837
Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 152,649 150,971 123,962
Cost | Office, furniture and equipment, net      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 2,518 2,264 1,827
Accumulated depreciation and depletion      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (1,078,029) (785,686) (596,005)
Accumulated depreciation and depletion | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (1,076,191) (784,133) (594,665)
Accumulated depreciation and depletion | Office, furniture and equipment, net      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (1,838) (1,553) (1,340)
Fekola Mine, Mali | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 1,024,156 1,059,307 0
Fekola Mine, Mali | Cost | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 1,168,491 1,094,784 0
Fekola Mine, Mali | Accumulated depreciation and depletion | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (144,335) (35,477) 0
Otjikoto Mine, Namibia | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 336,548 363,916 385,680
Otjikoto Mine, Namibia | Cost | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 575,127 527,069 481,378
Otjikoto Mine, Namibia | Accumulated depreciation and depletion | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (238,579) (163,153) (95,698)
Masbate Mine, Philippines | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 433,488 431,797 352,233
Masbate Mine, Philippines | Cost | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 681,509 625,722 517,457
Masbate Mine, Philippines | Accumulated depreciation and depletion | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (248,021) (193,925) (165,224)
Masbate Mine, Philippines | Cost, net of impairment | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 681,509    
Libertad Mine, Nicaragua | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 19,854 71,813 74,328
Libertad Mine, Nicaragua | Cost | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 315,569 335,651 300,816
Libertad Mine, Nicaragua | Accumulated depreciation and depletion | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (295,715) (263,838) (226,488)
Libertad Mine, Nicaragua | Cost, net of impairment | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 315,569    
Limon Mine, Nicaragua | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 67,722 45,618 43,931
Limon Mine, Nicaragua | Cost | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 217,263 173,358 151,186
Limon Mine, Nicaragua | Accumulated depreciation and depletion | Property, plant and equipment (depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment (149,541) (127,740) (107,255)
Kiaka, Burkina Faso | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 73,173 69,989 64,907
Kiaka, Burkina Faso | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 73,173 69,989 64,907
Fekola Regional | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 21,903 17,211 9,326
Fekola Regional | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 21,903 17,211 9,326
Toega, Burkina Faso | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 19,581 10,603 4,819
Toega, Burkina Faso | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 19,581 10,603 4,819
Mocoa Royalty, Colombia | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 10,230 29,041  
Mocoa Royalty, Colombia | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 10,230 29,041  
Ondundu, Namibia | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 8,273 5,246 2,130
Ondundu, Namibia | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 8,273 5,246 2,130
Finland Properties, Finland | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 5,947 2,991 1,642
Finland Properties, Finland | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 5,947 2,991 1,642
Other | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 13,542 15,890 12,134
Other | Cost | Exploration and evaluation properties (non-depletable)      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 13,542 15,890 12,134
Gramalote, Colombia, net of impairment      
Disclosure of detailed information about property, plant and equipment [line items]      
Investments in joint ventures (accounted for using the equity method) $ 72,078 $ 65,830 $ 53,724