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Mining concessions, development costs, right-of-use assets, property, plant and equipment, net - Net assets for right in use (Details)
 1 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
item
Dec. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
item
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mining concessions, development costs, property, plant and equipment, net          
After-tax discount rate applied to the pre-tax cash flows   6.04 5.25    
Pre-tax discount rate applied to the pre-tax cash flows   9.31% 8.09%    
Book Value Of Assets Under Finance Lease   $ 270,800,000 $ 187,800,000    
Acquisition Of Assets Under Lease       $ 0 $ 0
Capitalized finance costs       0 $ 0
Right-of-use assets   5,338,000 7,178,000    
Additions to right-of-use assets   3,000,000.0 6,200,000    
Disposal of right of use assets     1,300,000    
Write-off of stripping activity asset   6,763,000 11,633,000 0  
Impairment loss   395,434,000      
Buildings and other constructions          
Mining concessions, development costs, property, plant and equipment, net          
Right-of-use assets   2,501,000 3,330,000    
Transportation units          
Mining concessions, development costs, property, plant and equipment, net          
Right-of-use assets   2,088,000 3,370,000    
Machinery and equipment [Member]          
Mining concessions, development costs, property, plant and equipment, net          
Right-of-use assets   749,000 $ 478,000    
El Brocal          
Mining concessions, development costs, property, plant and equipment, net          
After-tax discount rate applied to the pre-tax cash flows     7.91    
Pre-tax discount rate applied to the pre-tax cash flows     12.18%    
Goodwill   $ 34,000,000.0 $ 34,000,000.0    
Stripping activity asset of phase 6 written off | item 1,181,280        
Stripping activity asset of phase 9 written off | item     1,102,117    
Write-off of stripping activity asset $ 6,763,000   $ 11,633,000    
Stripping activity balance after phase 6 written off | item   5,730      
Stripping activity asset of phase 6 expected to be produced   $ 118,000      
La Zanja mining unit [Member]          
Mining concessions, development costs, property, plant and equipment, net          
After-tax discount rate applied to the pre-tax cash flows   7.01 5.96    
Pre-tax discount rate applied to the pre-tax cash flows   10.81% 9.19%    
Ros Seco Mining Unit [Member]          
Mining concessions, development costs, property, plant and equipment, net          
After-tax discount rate applied to the pre-tax cash flows   7.86      
Pre-tax discount rate applied to the pre-tax cash flows   12.12%      
Impairment Of Long Lived Asset [Member] | La Zanja mining unit [Member]          
Mining concessions, development costs, property, plant and equipment, net          
Provisions     $ 0    
Impairment of value of inventory, note 8(c)   $ 5,000,000.0      
Impairment Of Long Lived Asset [Member] | Julcani Mining Unit [Member]          
Mining concessions, development costs, property, plant and equipment, net          
Provisions     0    
Impairment of value of inventory, note 8(c)     2,100,000 $ 2,100,000  
Impairment Of Long Lived Asset [Member] | Ros Seco Mining Unit [Member]          
Mining concessions, development costs, property, plant and equipment, net          
Impairment loss   $ 19,900,000      
Impairment Of Long Lived Asset [Member] | Orcopampa [Member]          
Mining concessions, development costs, property, plant and equipment, net          
Provisions     0    
Impairment Of Long Lived Asset [Member] | Ucchuchacua [Member]          
Mining concessions, development costs, property, plant and equipment, net          
Provisions     0    
Impairment Of Long Lived Asset [Member] | El Brocal          
Mining concessions, development costs, property, plant and equipment, net          
Provisions     $ 0