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Share Capital and Reserves - Summarized Financial Information of Subsidiary (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of subsidiaries [line items]    
Current Assets $ 32,727 $ 33,604
Total assets 1,974,777 620,858
Total liabilities 533,372 28,220
Depletion (59,780) (35,704)
Income tax expense (9,319) (17,231)
Total comprehensive income (loss) for the year 207,469 $ (17,446)
Compañia Minera Caserones [Member]    
Disclosure of subsidiaries [line items]    
Current Assets 1,791  
Non-current Assets 81,022  
Total assets 82,813  
Current Liabilities 445  
Non-current Liabilities 0  
Total liabilities 445  
Net Assets 82,368  
Revenue 2,615  
Depletion (1,656)  
Administration expenses and other 28  
Income tax expense (714)  
Total comprehensive income (loss) for the year 273  
Total net income and comprehensive income attributable to non-controlling interests $ 89