XML 133 R76.htm IDEA: XBRL DOCUMENT v3.23.1
Inventories - Summary of inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Classes of current inventories [abstract]    
Ore stockpiles $ 10,521 $ 10,097
In-process inventory and finished goods 67,261 63,513
Materials and supplies 121,090 104,553
Inventories $ 198,872 $ 178,163