v3.26.1
OPERATING SEGMENTS - Disaggregation of Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2024
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]            
Revenue $ 443,798 $ 405,455   $ 1,025,576 $ 722,073  
Cost of sales [1] 173,672 162,948   368,791 299,589  
Depreciation, depletion, and amortization 31,052 26,204   61,157 56,785  
General and administrative expense 27,649 26,634   66,130 50,529  
Exploration and evaluation 8,959 6,057   14,263 12,017  
Reclamation and remediation costs 7,149 6,309   13,647 10,014  
Care and maintenance 0 1,013   0 1,013  
Other operating expense (income), net 3,641 8,214   9,457 17,234  
Operating income (loss) 191,676 168,076   492,131 274,892  
Foreign exchange gain (loss) (18,318) (10,218)   (12,577) (14,849)  
Total assets 4,279,290     4,279,290   $ 6,093,898
Continuing Operations            
Segment Reporting [Line Items]            
Revenue 443,798 405,455   1,025,576 722,073  
Cost of sales 173,672 162,948   368,791 299,589  
Depreciation, depletion, and amortization 31,052 26,204   61,157 56,785  
General and administrative expense 27,649 26,634   66,130 50,529  
Exploration and evaluation 8,959 6,057   14,263 12,017  
Reclamation and remediation costs 7,149 6,309   13,647 10,014  
Care and maintenance   1,013     1,013  
Other operating expense (income), net 3,641 8,214   9,457 17,234  
Operating income (loss) 191,676 168,076   492,131 274,892  
Interest expense (393) (2,585)   (1,662) (4,377)  
Interest income 4,824 3,023   7,984 6,020  
Other income (expense) 7,543 2,971   12,331 6,236  
Foreign exchange gain (loss) (18,318) (10,218)   (12,577) (14,849)  
Income (loss) before income and mining taxes 185,332 161,267   498,207 267,922  
Capital expenditures 80,445 46,812   136,148 76,452  
Total assets 4,279,290 2,431,320   4,279,290 2,431,320  
Operating Segments            
Segment Reporting [Line Items]            
Revenue 443,798 405,455   1,025,576 722,073  
Cost of sales 173,672 162,948   368,791 299,589  
Depreciation, depletion, and amortization 30,973 26,124   60,998 56,626  
General and administrative expense 0 0   0 0  
Exploration and evaluation 6,027 5,177   10,228 10,575  
Reclamation and remediation costs 7,149 6,309   13,647 10,014  
Care and maintenance   1,013     1,013  
Other operating expense (income), net 1,408 1,244   5,517 1,827  
Operating income (loss) 224,569 202,640   566,395 342,429  
Interest expense (32) (877)   (47) (982)  
Interest income 793 1,966   1,661 4,340  
Other income (expense) 7,642 3,701   12,737 7,304  
Foreign exchange gain (loss) (13,595) (5,381)   (7,933) (9,174)  
Income (loss) before income and mining taxes 219,377 202,049   572,813 343,917  
Capital expenditures 80,445 46,053   136,148 76,452  
Total assets 2,384,476 2,072,592   2,384,476 2,072,592  
Operating Segments | Marigold            
Segment Reporting [Line Items]            
Revenue 127,376 118,786   315,015 235,966  
Cost of sales 58,843 56,376   130,477 115,102  
Depreciation, depletion, and amortization 8,096 8,228   18,095 16,941  
General and administrative expense 0 0   0 0  
Exploration and evaluation 219 1,824   462 2,515  
Reclamation and remediation costs 890 806   1,779 1,610  
Care and maintenance   0     0  
Other operating expense (income), net 1,177 313   4,020 656  
Operating income (loss) 58,151 51,239   160,182 99,142  
Interest expense 0 0   0 0  
Interest income 121 756   324 2,356  
Other income (expense) (210) (246)   (413) (459)  
Foreign exchange gain (loss) 0 0   0 0  
Income (loss) before income and mining taxes 58,062 51,749   160,093 101,039  
Capital expenditures 40,188 18,841   65,861 34,091  
Total assets 947,676 818,746   947,676 818,746  
Operating Segments | CC&V            
Segment Reporting [Line Items]            
Revenue 129,094 149,965   315,546 184,837  
Cost of sales 44,488 50,003   99,234 67,968  
Depreciation, depletion, and amortization 4,820 2,784   10,199 3,288  
General and administrative expense 0 0   0 0  
Exploration and evaluation 225 (195)   248 0  
Reclamation and remediation costs 4,643 3,887   8,636 5,171  
Care and maintenance   0     0  
Other operating expense (income), net (110) 630   533 634  
Operating income (loss) 75,028 92,856   196,696 107,776  
Interest expense (3) 0   (11) 0  
Interest income 187 0   327 0  
Other income (expense) 1,528 0   1,915 0  
Foreign exchange gain (loss) 1 0   1 0  
Income (loss) before income and mining taxes 76,741 92,856   198,928 107,776  
Capital expenditures 19,442 14,427   26,919 15,820  
Total assets 727,212 534,551   727,212 534,551  
Operating Segments | Seabee            
Segment Reporting [Line Items]            
Revenue 65,311 34,540   93,757 110,842  
Cost of sales 27,016 18,473   48,261 41,604  
Depreciation, depletion, and amortization 12,218 6,921   19,154 20,425  
General and administrative expense 0 0   0 0  
Exploration and evaluation 1,619 2,743   3,434 6,883  
Reclamation and remediation costs 336 336   672 672  
Care and maintenance   1,013     1,013  
Other operating expense (income), net 44 98   443 98  
Operating income (loss) 24,078 4,956   21,793 40,147  
Interest expense 0 0   (12) 0  
Interest income 61 303   265 731  
Other income (expense) 5 (7)   (17) (15)  
Foreign exchange gain (loss) (302) 854   (217) 746  
Income (loss) before income and mining taxes 23,842 6,106   21,812 41,609  
Capital expenditures 11,058 8,762   28,866 20,564  
Total assets 393,261 355,909   393,261 355,909  
Direct costs   200 $ 200      
Depreciation   800 $ 800      
Operating Segments | Puna            
Segment Reporting [Line Items]            
Revenue 122,017 102,164   301,258 190,428  
Cost of sales 43,325 38,096   90,819 74,915  
Depreciation, depletion, and amortization 5,839 8,191   13,550 15,972  
General and administrative expense 0 0   0 0  
Exploration and evaluation 3,964 805   6,084 1,177  
Reclamation and remediation costs 1,280 1,280   2,560 2,561  
Care and maintenance   0     0  
Other operating expense (income), net 297 203   521 439  
Operating income (loss) 67,312 53,589   187,724 95,364  
Interest expense (29) (877)   (24) (982)  
Interest income 424 907   745 1,253  
Other income (expense) 6,319 3,954   11,252 7,778  
Foreign exchange gain (loss) (13,294) (6,235)   (7,717) (9,920)  
Income (loss) before income and mining taxes 60,732 51,338   191,980 93,493  
Capital expenditures 9,757 4,023   14,502 5,977  
Total assets 316,327 363,386   316,327 363,386  
Corporate and Other            
Segment Reporting [Line Items]            
Revenue 0 0   0 0  
Cost of sales 0 0   0 0  
Depreciation, depletion, and amortization 79 80   159 159  
General and administrative expense 27,649 26,634   66,130 50,529  
Exploration and evaluation 2,932 880   4,035 1,442  
Reclamation and remediation costs 0 0   0 0  
Care and maintenance   0     0  
Other operating expense (income), net 2,233 6,970   3,940 15,407  
Operating income (loss) (32,893) (34,564)   (74,264) (67,537)  
Interest expense (361) (1,708)   (1,615) (3,395)  
Interest income 4,031 1,057   6,323 1,680  
Other income (expense) (99) (730)   (406) (1,068)  
Foreign exchange gain (loss) (4,723) (4,837)   (4,644) (5,675)  
Income (loss) before income and mining taxes (34,045) (40,782)   (74,606) (75,995)  
Capital expenditures 0 759   0 0  
Total assets $ 1,894,814 $ 358,728   $ 1,894,814 $ 358,728  
[1] Excludes depreciation, depletion, and amortization.