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Cost of sales, without considering depreciation and amortization - Cost of sales (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of cost of sales [Line Items]      
Depreciation and amortization $ 226,335 $ 238,879 $ 210,154
Third parties services 3,378 4,318 12,954
Depreciation for right-of-use assets (see Note 7 and 10(a)) 11,488    
Variable lease payments, low-value and short-term leases (see Note 10(a)) 7,069    
Cost of sales 799,582 967,696 947,953
Sociedad Minera Cerro Verde S.A.A. [Member]      
Disclosure of cost of sales [Line Items]      
Materials and supplies 693,292 693,316 556,022
Depreciation and amortization 523,512 512,298 456,467
Labor (a) 285,081 357,692 286,058
Energy 228,853 254,243 229,272
Third parties services 181,215 159,514 144,829
Depreciation for right-of-use assets (see Note 7 and 10(a)) 11,488    
Variable lease payments, low-value and short-term leases (see Note 10(a)) 7,069    
Management Fees 2,923 2,743 2,867
Change in work in process inventory (23,427) (8,513) 51,412
Change in finished goods inventory (2,290) (5,723) 2,060
Other costs 47,033 45,402 39,251
Cost of sales $ 1,954,749 $ 2,010,972 $ 1,768,238