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Leases and right-of-use assets
 12 Months Ended
Dec. 31, 2022
Disclosure of Leases [Abstract]  
Leases and right-of-use assets
14. Leases and right-of-use assets
As a lessee, the Company leases various assets including mobile mine equipment, offices and properties. These right-of-use assets are presented as property, plant and equipment.
Right-of-use
Land and buildings
Right-of-use
Plant and equipment 		Total
Cost
Opening balance at January 1, 2021
$14,555 $29,841 $44,396 
Additions815 7,513 8,328 
Disposals(754)(2,117)(2,871)
Balance at December 31, 2021
$14,616 $35,237 $49,853 
Additions— 2,807 2,807 
Disposals— (178)(178)
Transfers and other movements64 (17,649)(17,585)
Balance at December 31, 2022
$14,680 $20,217 $34,897 
Accumulated depreciation
Opening balance at January 1, 2021
$(2,303)$(10,274)$(12,577)
Depreciation for the year(1,526)(6,495)(8,021)
Disposals438 380 818 
Balance at December 31, 2021
$(3,391)$(16,389)$(19,780)
Depreciation for the year(1,321)(4,198)(5,519)
Disposals— 155 155 
Transfers and other movements320 11,770 12,090 
Balance at December 31, 2022
$(4,392)$(8,662)$(13,054)
Right-of-use assets, net carrying amount at December 31, 2021
$11,225 $18,848 $30,073 
Right-of-use assets, net carrying amount at December 31, 2022
$10,288 $11,555 $21,843 
Interest expense on lease liabilities is disclosed in Note 18 (b) and the cash payments for the principal portion of lease liabilities is presented on the Consolidated Statement of Cash Flow. The Company's future obligations related to lease liabilities are disclosed in Note 24.