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Identification and business activity (Details Textual)
lb in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2018
USD ($)
lb
t
bbl
Dec. 31, 2017
USD ($)
lb
Dec. 31, 2016
USD ($)
lb
Disclosure of identification and business activity [Line Items]      
Proceeds from sales of property, plant and equipment, classified as investing activities $ 2,240 $ 1,962 $ 7,180
Assets 4,217,221 4,332,813 4,266,415
Reversal of impairment loss $ 0 $ (11,770) $ 0
Processing Capacity | t 548,500    
Concentrator Facility Capacity | t 409,500    
Pre Expansion Capacity Approved | t 361,500    
Capacity of Crushed Leach Facility | t 39,000    
Run Of Mine Capacity | t 100,000    
Quecher Main project [Member]      
Disclosure of identification and business activity [Line Items]      
Average production capacity | bbl 200,000    
Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of identification and business activity [Line Items]      
Volume of gold produced | lb 520 530 660
Description Of Location of Entity Operation The Company's operations are located approximately 375 miles (604 kilometers) north of Lima and 30 miles (48 kilometers) north of the city of Cajamarca and are primarily accessible by paved roads. The Yanacocha property began production in 1993 and consists of the following open pit mines: the La Quinua Complex, the Yanacocha Complex, the Carachugo Complex and Maqui Maqui. In addition, The Company has four leach pads (La Quinua, Yanacocha, Carachugo and Maqui Maqui), three gold processing plants (Pampa Larga, Yanacocha Norte and La Quinua), one limestone processing facility (China Linda) and one mill (Yanacocha Gold Mill).    
Sociedads Mineras Cerro Verde Saa [Member] | Quecher Main project [Member]      
Disclosure of identification and business activity [Line Items]      
Average production capacity | bbl 200,000,000    
Newmont Second Capital Corporation [Member] | Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interest in subsidiary 51.35%    
S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of identification and business activity [Line Items]      
Royalty rate on net sales 3.00%    
Newmont Mining Corporation [Member] | Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interest in subsidiary 100.00%    
Cyprus Climax Metals [Member] | Sociedads Mineras Cerro Verde Saa [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interest in subsidiary 53.56%    
SMM Cerro Verde Netherlands B.V [Member] | Sociedads Mineras Cerro Verde Saa [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interests held by non-controlling interests 21.00%    
Compania de Minas Buenaventura S.A.A. [Member] | Sociedads Mineras Cerro Verde Saa [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interests held by non-controlling interests 19.58%    
other stakeholders [Member] | Sociedads Mineras Cerro Verde Saa [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interests held by non-controlling interests 5.86%    
Mining activities [Member]      
Disclosure of identification and business activity [Line Items]      
Losses on disposals of non-current assets   $ 4,000  
Reversal of impairment loss   $ 11,800  
El Brocal [Member] | Mining activities [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of voting rights held in subsidiary 61.43% 61.43%  
El Brocal [Member] | Mining activities [Member] | Indirect [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of voting rights held in subsidiary 58.24% 58.24%  
Colquijirca S.A. [Member] | Mining activities [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of voting rights held in subsidiary 99.99% 99.99%  
Antapite [Member] | Mining activities [Member]      
Disclosure of identification and business activity [Line Items]      
Proceeds from sales of property, plant and equipment, classified as investing activities     $ 1,000
Losses on disposals of non-current assets     $ 3,000
Compania Minera Condesa S.A. [Member] | Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interests held by non-controlling interests 43.65%    
Compania Minera Condesa S.A. [Member] | Mining activities [Member] | Indirect [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interest in subsidiary 0.00% 0.00%  
Minas Buenaventura S.A.A [Member] | Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of identification and business activity [Line Items]      
Proportion of ownership interest in subsidiary 100.00%    
Breapampa [Member] | Mining activities [Member]      
Disclosure of identification and business activity [Line Items]      
Proceeds from sales of property, plant and equipment, classified as investing activities   $ 2,000  
Reversal of impairment loss $ 7,400    
Recuperada [Member] | Mining activities [Member]      
Disclosure of identification and business activity [Line Items]      
Proceeds from sales of property, plant and equipment, classified as investing activities   $ 600  
Reversal of impairment loss $ 7,100