v3.26.3
Note 2 - Business Segments and Sales of Products - Information About Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Total sales $ 394,820 $ 315,998 $ 1,140,104 $ 740,324  
Salaries, wages and other benefits 47,437 43,532 144,356 123,278  
Contractors 30,528 26,066 65,548 57,006  
Materials And Consumables 48,297 45,078 138,447 132,683  
Product inventory change 14,692 12,036 7,925 (1,585)  
Other direct production costs 17,243 9,213 43,614 33,780  
Depreciation, depletion and amortization 36,549 37,728 107,089 98,857  
Gross profit 200,074 142,345 633,125 296,305  
Other operating expenses 42,920 [1] 31,362 [2] 107,166 [3] 79,950 [4]  
Income from operations 157,154 110,983 525,959 216,355  
Interest expense (620) (13,264) (8,689) (35,604)  
Fair value adjustments, net 26,691 19,828 11,500 27,666  
Net foreign exchange (loss) gain (652) 436 (4,599) (3,724)  
Other income 7,575 2,410 18,173 4,697  
Income before income and mining taxes 190,148 120,393 542,344 209,390  
Capital additions 51,714 44,425 130,121 124,939  
Identifiable assets 3,360,024   3,360,024   $ 3,560,645
Assets of discontinued operations 0   0   751,729
Total assets of reportable segments 1,829,923   1,829,923   1,834,213
Operating Segments [Member]          
Segment Reporting [Line Items]          
Salaries, wages and other benefits 47,184 43,355 143,814 122,905  
Contractors 11,185 10,401 30,914 27,991  
Materials And Consumables 45,499 44,741 136,066 132,172  
Product inventory change 14,692 12,036 7,925 (1,585)  
Other direct production costs 17,234 9,209 43,563 33,776  
Depreciation, depletion and amortization 36,549 37,728 107,089 98,857  
Gross profit 200,111 142,337 632,886 296,333  
Capital additions 46,606 43,791 120,749 121,816  
MetalSales [Member]          
Segment Reporting [Line Items]          
Total sales 372,454 299,807 1,102,257 710,449  
MetalSales [Member] | Operating Segments [Member]          
Segment Reporting [Line Items]          
Total sales 372,454 299,807 1,102,257 710,449  
EnvironmentalRemediationServices [Member]          
Segment Reporting [Line Items]          
Total sales 22,366 16,191 37,847 29,875  
EnvironmentalRemediationServices [Member] | Operating Segments [Member]          
Segment Reporting [Line Items]          
Total sales 0   0 0  
IntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 5,860 1,928 9,733 4,115  
IntersegmentSales [Member] | Operating Segments [Member]          
Segment Reporting [Line Items]          
Total sales 5,860 1,928 9,733 4,115  
ReconciliationOfSales [Member]          
Segment Reporting [Line Items]          
Total sales 400,680 317,926 1,149,837 744,439  
ReconciliationOfSales [Member] | Operating Segments [Member]          
Segment Reporting [Line Items]          
Total sales 378,314 301,735 1,111,990 714,564  
EliminationOfIntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales (5,860) (1,928) (9,733) (4,115)  
EliminationOfIntersegmentSales [Member] | Operating Segments [Member]          
Segment Reporting [Line Items]          
Total sales (5,860) (1,928) (9,733) (4,115)  
Greens Creek [Member]          
Segment Reporting [Line Items]          
Salaries, wages and other benefits 20,282 19,392 60,088 55,926  
Contractors 2,882 2,951 8,304 5,413  
Materials And Consumables 27,159 27,430 81,476 78,495  
Product inventory change 12,561 5,106 8,338 (3,227)  
Other direct production costs 13,283 10,550 34,247 30,895  
Depreciation, depletion and amortization 15,621 16,229 45,918 42,715  
Gross profit 130,428 96,406 400,177 207,992  
Capital additions 11,746 12,179 29,929 31,335  
Identifiable assets 637,735   637,735   640,011
Greens Creek [Member] | MetalSales [Member]          
Segment Reporting [Line Items]          
Total sales 222,216 178,064 638,548 418,209  
Greens Creek [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Greens Creek [Member] | IntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Greens Creek [Member] | ReconciliationOfSales [Member]          
Segment Reporting [Line Items]          
Total sales 222,216 178,064 638,548 418,209  
Greens Creek [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Lucky Friday [Member]          
Segment Reporting [Line Items]          
Salaries, wages and other benefits 18,086 16,586 57,274 45,921  
Contractors 3,684 3,669 11,722 11,360  
Materials And Consumables 10,226 11,398 31,246 33,720  
Product inventory change 535 (1,127) 1,699 (421)  
Other direct production costs 1,694 644 2,427 (225)  
Depreciation, depletion and amortization 14,985 13,471 45,545 40,171  
Gross profit 50,856 29,551 182,730 70,683  
Capital additions 23,655 16,865 57,354 48,253  
Identifiable assets 665,736   665,736   688,997
Lucky Friday [Member] | MetalSales [Member]          
Segment Reporting [Line Items]          
Total sales 100,066 74,192 332,643 201,659  
Lucky Friday [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Lucky Friday [Member] | IntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Lucky Friday [Member] | ReconciliationOfSales [Member]          
Segment Reporting [Line Items]          
Total sales 100,066 74,192 332,643 201,659  
Lucky Friday [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Keno Hill [Member]          
Segment Reporting [Line Items]          
Salaries, wages and other benefits 8,816 7,377 26,452 21,058  
Contractors 4,619 3,781 10,888 11,218  
Materials And Consumables 8,114 5,913 23,344 19,957  
Product inventory change 1,596 8,057 (2,112) 2,063  
Other direct production costs 2,257 (1,985) 6,889 2,656  
Depreciation, depletion and amortization 5,943 8,028 15,626 15,971  
Gross profit 18,827 16,380 49,979 17,658  
Capital additions 11,205 14,747 33,466 42,228  
Identifiable assets 526,452   526,452   505,205
Keno Hill [Member] | MetalSales [Member]          
Segment Reporting [Line Items]          
Total sales 50,172 47,551 131,066 90,581  
Keno Hill [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Keno Hill [Member] | IntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 5,860 1,928 9,733 4,115  
Keno Hill [Member] | ReconciliationOfSales [Member]          
Segment Reporting [Line Items]          
Total sales 56,032 49,479 140,799 94,696  
Keno Hill [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales (5,860) (1,928) (9,733) (4,115)  
Other [Member]          
Segment Reporting [Line Items]          
Salaries, wages and other benefits 253 177 542 373  
Contractors 19,343 15,665 34,634 29,015  
Materials And Consumables (2,798) 337 (2,381) 511  
Product inventory change 0 0 0 0  
Other direct production costs 9 4 51  
Depreciation, depletion and amortization 0 0 0  
Gross profit (37) (8) 239 (28)  
Capital additions 5,108 634 9,372 3,123  
Identifiable assets 1,530,101   1,530,101   $ 974,703
Other [Member] | MetalSales [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Other [Member] | EnvironmentalRemediationServices [Member]          
Segment Reporting [Line Items]          
Total sales 22,366   37,847 29,875  
Other [Member] | EnvironmentalRemediationServices [Member] | Operating Segments [Member]          
Segment Reporting [Line Items]          
Total sales   0      
Other [Member] | IntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales 0 0 0 0  
Other [Member] | ReconciliationOfSales [Member]          
Segment Reporting [Line Items]          
Total sales 22,366 16,191 37,847 29,875  
Other [Member] | EliminationOfIntersegmentSales [Member]          
Segment Reporting [Line Items]          
Total sales $ 0 $ 0 $ 0 $ 0  
[1] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.
[2] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.
[3] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.
[4] Other operating expense items include general and administrative, exploration and pre-development, care and maintenance, provision for closed operations and environmental matters, and other operating expense, net.