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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Classes of current inventories [abstract]  
Summary of inventories
December 31, 2021December 31, 2020
Ore stockpiles$10,097 $6,327 
In-process inventory and finished goods63,513 68,984 
Materials and supplies104,553 88,824 
$178,163 $164,135