XML 197 R141.htm IDEA: XBRL DOCUMENT v3.22.1
Production costs - Summary of Product Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Expenses by nature [abstract]    
Labour $ 126,527 $ 116,653
Fuel 18,892 16,464
Reagents 42,473 53,399
Electricity 22,214 17,904
Mining contractors 46,403 38,240
Operating and maintenance supplies and services 77,033 78,062
Site general and administrative costs 53,358 46,588
Royalties, production taxes and selling expenses 62,848 77,873
Production costs $ 449,748 $ 445,183