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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details)
12 Months Ended
Dec. 31, 2023
USD ($)
item
t
segment
$ / lb
Dec. 31, 2022
$ / lb
Dec. 31, 2020
$ / lb
Significant Accounting Policies      
Increase in total reserves at a property to qualify as a major expansion (as a percent) 10.00%    
Current price of copper (in dollars per pound) | $ / lb 3.30 3.30 2.816
Impairment in the carrying value of long-term assets | $ $ 0    
Number of reportable segments | segment 3    
Copper concentrates      
Significant Accounting Policies      
Long-term contracts with promises to deliver mineral 185,000    
Copper cathodes      
Significant Accounting Policies      
Long-term contracts with promises to deliver mineral 48,000    
Molybdenum concentrates      
Significant Accounting Policies      
Long-term contracts with promises to deliver mineral 18,830    
Sulfuric acid      
Significant Accounting Policies      
Long-term contracts with promises to deliver mineral 330,000    
Minimum      
Financial information related to segments      
Estimated useful lives of buildings and equipment 2 years    
Significant Accounting Policies      
Percentage of metal production sold under annual or longer-term contracts 80.00%    
Maximum      
Financial information related to segments      
Maximum period after shipping within which pricing is based by customer contracts in most cases 3 months    
Estimated useful lives of buildings and equipment 50 years    
Significant Accounting Policies      
Percentage of metal production sold under annual or longer-term contracts 90.00%    
Peruvian Operations      
Financial information related to segments      
Number of open-pit copper mines | item 2    
Mexican IMMSA Unit      
Financial information related to segments      
Number of underground poly metal mines | item 5