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Trade and other receivables, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Trade and other receivables, net [Line Items]      
Trade receivables, gross $ 228,855 $ 174,825  
Trade receivables, net ,Allowance for doubtful accounts (22,823) (22,644) $ 21,741
Trade receivables, net 206,032 152,181  
Other receivables 154,404 291,919  
Other receivables, Allowance for doubtful accounts 9,361 (8,963) $ 4,779
Total trade and other receivables, net 351,075 435,137  
Classification by maturity:      
Current portion 306,884 269,089  
Non-current portion 44,191 166,048  
Total trade and other receivables, net 351,075 435,137  
Classification by nature:      
Financial receivables 255,088 319,454  
Non-financial receivables 95,987 115,683  
Total trade and other receivables, net 351,075 435,137  
Embedded derivatives for sale of concentrate, net 7,424 0  
Sociedad Minera Cerro Verde S.A.A. [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 1,656 2,594  
Classification by nature:      
Embedded derivatives for sale of concentrate, net 68,736 67,449  
CASE and SISE Contributions Refund [1] 6,474 0  
Other current receivables 76,866 70,043  
Domestic clients [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Trade receivables, gross 102,119 89,811  
Foreign clients [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Trade receivables, gross 119,388 77,254  
Related entities [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Trade receivables, gross [2] 7,348 7,760  
Other receivables [2] 732 126,669  
Value added tax credit [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 74,785 96,204  
Claims to third parties [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 3,851 113  
Refund application of value added tax [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 18,450 17,037  
Tax deposits [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables [3] 9,733 13,479  
Restricted bank accounts [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables [4] 2,372 2,087  
Other minors [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 4,675 1,021  
Accounts payable to third parties [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 27,406 26,705  
Due from sale of assets [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 5,371 5,204  
Claims to tax authority [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 2,752 2,492  
Accounts receivable from hedge instruments [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables 2,300 0  
Advances to suppliers [Member]      
Disclosure of Trade and other receivables, net [Line Items]      
Other receivables $ 1,977 $ 908  
[1] Corresponds to the energy and fuel invoice payments made for the years 2015 and 2016 related to the Charge for Energy Security Consolidation (CASE) and the Charge for Energy Security on Hydrocarbons System (SISE). Law N°30543, passed on March 02, 2017, establishes the elimination and refund of these payments.
[2] Trade accounts receivable are denominated in U.S. dollars, are neither due nor impaired, do not yield interest and have no specific guarantees.
[3] Corresponds to deposits held in the Peruvian State bank which only can be used to offset tax obligations that companies have with the Tax Authorities.
[4] These balances correspond to restricted bank accounts for payment of financial obligations held by the subsidiary Empresa de Generación Huanza S.A. (hereafter “Huanza”), according to the finance lease signed with Banco de Crédito del Perú in 2009.