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Commitments and contractual obligations - Summary of Contractual Obligations (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
Disclosure of contingent liabilities [line items]  
Contractual capital commitments $ 961,344
2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 42,689
2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 15,341
2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 90,343
2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 80,739
2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 732,232
Debt - senior notes  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 500,000
Debt - senior notes | 2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Debt - senior notes | 2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Debt - senior notes | 2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Debt - senior notes | 2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Debt - senior notes | 2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 500,000
Debt - Term Facility  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 172,595
Debt - Term Facility | 2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Debt - Term Facility | 2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Debt - Term Facility | 2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 78,453
Debt - Term Facility | 2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 75,184
Debt - Term Facility | 2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 18,958
Purchase obligations  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 24,935
Purchase obligations | 2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 23,651
Purchase obligations | 2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 1,284
Purchase obligations | 2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Purchase obligations | 2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Purchase obligations | 2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Leases  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 23,117
Leases | 2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 7,016
Leases | 2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 4,077
Leases | 2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 2,845
Leases | 2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 2,199
Leases | 2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 6,980
Mineral properties  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 27,988
Mineral properties | 2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 8,003
Mineral properties | 2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 8,063
Mineral properties | 2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 8,087
Mineral properties | 2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 3,356
Mineral properties | 2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 479
Asset retirement obligations  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 212,709
Asset retirement obligations | 2024  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 4,019
Asset retirement obligations | 2025  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 1,917
Asset retirement obligations | 2026  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 958
Asset retirement obligations | 2027  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments 0
Asset retirement obligations | 2028 and later  
Disclosure of contingent liabilities [line items]  
Contractual capital commitments $ 205,815