v3.26.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Statement of Financial Position [Abstract]    
Common shares authorized Unlimited Unlimited
Common shares, issued (in shares) 216,512 203,001
Common shares, outstanding (in shares) 216,512 203,001
Assets [1] $ 5,946,734 $ 6,093,898
Cash and cash equivalents 634,086 524,750
Trade and other receivables 138,633 136,721
Inventories, current 522,949 488,800
Mineral properties, plant and equipment, net 1,885,346 1,835,722
Inventories, noncurrent 327,075 328,923
Other non-current assets 60,862 62,279
Liabilities [1] 1,517,971 1,779,644
Accounts payable 36,604 29,201
Accrued liabilities and other 228,370 197,353
Reclamation and remediation liabilities, current 7,895 8,814
Reclamation and remediation liabilities, non-current 396,826 390,209
Deferred income tax liabilities 206,995 198,527
Other non-current liabilities 52,109 39,327
Nonrelated Party    
Prepaids and other current assets 49,137 30,299
Related Party    
Prepaids and other current assets 23,856 23,549
Variable Interest Entity, Primary Beneficiary    
Assets 900,400 858,800
Cash and cash equivalents 17,000 9,200
Trade and other receivables 2,000 3,300
Mineral properties, plant and equipment, net 841,900 811,300
Other non-current assets 5,200 4,400
Liabilities 143,700 132,800
Accounts payable 3,600 3,800
Accrued liabilities and other 3,100 4,100
Deferred income tax liabilities 71,000 73,500
Other non-current liabilities 66,000 51,400
Variable Interest Entity, Primary Beneficiary | Nonrelated Party    
Prepaids and other current assets $ 10,400 7,100
Variable Interest Entity, Primary Beneficiary | Related Party    
Prepaids and other current assets   $ 23,500
[1] The consolidated assets as of March 31, 2026 and December 31, 2025 include $900.4 million and $858.8 million, respectively, of assets of variable interest entities (“VIEs”) that can only be used to settle the obligations of the VIEs. As of March 31, 2026 and December 31, 2025, the assets include Cash and cash equivalents of $17.0 million and $9.2 million, respectively; Trade and other receivables of $2.0 million and $3.3 million, respectively; Prepaids and other current assets of $10.4 million and $7.1 million, respectively; Prepaids, related party of $23.9 million and $23.5 million, respectively; Mineral properties, plant and equipment, net of $841.9 million and $811.3 million, respectively; and Other non-current assets of $5.2 million and $4.4 million, respectively. The consolidated liabilities as of March 31, 2026 and December 31, 2025 include $143.7 million and $132.8 million, respectively, of liabilities of VIEs whose creditors have no recourse to the Company. As of March 31, 2026 and December 31, 2025, the liabilities include Accounts payable of $3.6 million and $3.8 million, respectively; Accrued liabilities and other of $3.1 million and $4.1 million, respectively; Deferred income tax liabilities of $71.0 million and $73.5 million, respectively; and Other non-current liabilities of $66.0 million and $51.4 million, respectively. Certain consolidated VIE assets and liabilities were classified as held for sale during the first quarter of 2026, refer to Note 3 and Note 4 for further details on held for sale and discontinued operations.