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Financial Instruments - Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Financial Assets and Liabilities [Line Items]    
Short-term investments $ 35,337 $ 51,723
Derivative assets 2,883 3,995
Derivative liabilities (1,780) (351)
Financial assets 394,125 456,190
Level 1 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Derivative assets 0 0
Derivative liabilities 0 0
Financial assets 156,537 51,723
Level 2 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Derivative assets 2,883 3,995
Derivative liabilities (1,780) (351)
Financial assets 51,361 43,664
Short-term investments | Level 1 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Short-term investments 35,337 51,723
Short-term investments | Level 2 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Short-term investments 0 0
Trade receivables from provisional concentrate sales [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Financial assets 50,258 40,020
Trade receivables from provisional concentrate sales [member] | Level 1 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Financial assets 0 0
Trade receivables from provisional concentrate sales [member] | Level 2 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Financial assets 50,258 40,020
Long-term investment | Level 1 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Short-term investments 121,200 0
Long-term investment | Level 2 [member]    
Disclosure of Financial Assets and Liabilities [Line Items]    
Short-term investments $ 0 $ 0