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Costs applicable to sales (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Depreciation and amortization $ 241,286 $ 213,722 $ 192,647
Cost of sales of goods, excluding depreciation and amortization 982,957 980,254 824,973
Minera Yanacocha SRL and subsidiary [Member]      
Beginning balance of finished goods and in-process 345,489 446,503 544,325
Beginning balance of provision for net realizable value, note 8(b) (62,540) (84,374) (90,298)
Consumption of supplies 215,863 240,881 228,376
Personnel expenses 82,645 99,702 87,258
Other services 43,672 66,408 73,779
Maintenance 22,585 24,033 36,213
Power 24,203 23,565 27,270
Depreciation and amortization 156,212 87,783 140,712
Workers' profit participation 3,837 1,242 12,394
Reclamation expenses related to leach pads, note 12(b) 16,284 124,124 78,494
Ending balance of provision for net realizable value, note 8(b) 89,127 (62,540) (84,374)
Ending balance of finished goods and in-process (341,213) 345,489 446,503
Cost of sales of goods, excluding depreciation and amortization $ 596,164 $ 746,918 $ 776,394