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SUBSEQUENT EVENTS: (Details) - $ / shares
Mar. 02, 2022
Jan. 27, 2022
Feb. 21, 2019
Grupo Mexico and Americas Mining      
SUBSEQUENT EVENTS      
Dividends declared and paid     $ 0.44428
Dividend authorized      
SUBSEQUENT EVENTS      
Quarterly dividend authorized (in dollars per share)   $ 1.00  
Dividends declared and paid $ 0