Property, plant and equipment - Additional information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]
Increase (decrease) in proven and probable reserves (as a percent)	(12.00%)	(3.00%)
Impairment of property, plant and equipment		$ 0	$ 13,926
Capitalized underground development
Disclosure of detailed information about property, plant and equipment [line items]
Impairment of property, plant and equipment			$ 13,926

The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2022-03-24
-Paragraph 73
-Subparagraph e
-Clause v
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_v&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 98
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_98_a&doctype=Standard
-URIDate 2022-03-24

Name:	ifrs-full_ImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration