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Mining concessions, development costs, property, plant and equipment, net (Details Textual)
 12 Months Ended
Dec. 31, 2017
USD ($)
MT
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Pre-tax discount rate applied to the pre-tax cash flows 8.33%    
Property, plant and equipment $ 1,949,555,000 $ 1,960,025,000 $ 1,747,624,000
Capitalized finance costs $ 6,300,000 $ 7,500,000  
Average rate used to determine the financial cost to be capitalized 4.19% 3.52%  
Reversal of impairment loss $ (11,770,000) $ 0 0
Other reserves $ 269,000 269,000  
Stripping activity asset of ore | MT 5.5    
Stripping activity asset of waste | MT 9.2    
El Brocal [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Pre-tax discount rate applied to the pre-tax cash flows 5.89%    
Buenaventura [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Pre-tax discount rate applied to the pre-tax cash flows 9.30%    
Mining activities [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Reversal of impairment loss $ 11,770,000    
Mining activities [Member] | Breapampa [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Reversal of impairment loss 7,400,000    
Mining activities [Member] | Recuperada [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Reversal of impairment loss 7,100,000    
Mining activities [Member] | Shila Paula [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Reversal of impairment loss 2,700,000    
La Zanja mining unit [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Impairment loss recognised in profit or loss, property, plant and equipment 21,620,000   3,803,000
Breapampa mining unit [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Impairment loss recognised in profit or loss, property, plant and equipment     $ 7,452,000
Shila-Paula mining unit [Member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Impairment loss recognised in profit or loss, property, plant and equipment   2,043,000  
Property, plant and equipment under operating leases [member]      
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items]      
Additions   $ 0  
Capitalized finance costs $ 0