v3.26.1
Note 3 - Business Segments and Sales of Products - Information About Reportable Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales $ 411,433 $ 205,334  
Salaries, wages and other benefits 50,180 39,559  
Contractors 13,552 15,250  
Materials And Consumables 45,407 43,188  
Product inventory change 1,872 5,879  
Other direct production costs 13,399 14,719  
Depreciation, depletion and amortization 33,768 29,816  
Gross profit 253,255 68,681  
Other operating expenses 30,148 [1] 21,276 [2]  
Income from operations 223,107 47,405  
Interest expense (5,656) (11,392)  
Fair value adjustments, net (5,945) 3,388  
Foreign exchange gain/loss, net 498 (367)  
Other income 3,549 942  
Income before income and mining taxes 215,553 39,976  
Capital additions 39,265 37,838  
Identifiable assets 3,376,293   $ 3,560,645
Assets of discontinued operations 0   751,729
Total assets of reportable segments 3,376,293   2,808,916
Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Salaries, wages and other benefits   39,501  
Contractors   8,319  
Materials And Consumables   43,082  
Product inventory change   (5,879)  
Other direct production costs   14,719  
Depreciation, depletion and amortization   29,816  
Gross profit   68,688  
Capital additions   36,641  
MetalSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 406,781 198,246  
MetalSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales   198,246  
EnvironmentalRemediationServices [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 4,652 7,088  
EnvironmentalRemediationServices [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales   0  
IntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 1,639 986  
IntersegmentSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales   986  
ReconciliationOfSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 413,072 206,320  
ReconciliationOfSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales   199,232  
EliminationOfIntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales (1,639) (986)  
EliminationOfIntersegmentSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales   (986)  
Greens Creek [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Salaries, wages and other benefits 20,582 18,253  
Contractors 2,705 905  
Materials And Consumables 27,595 25,665  
Product inventory change 5,383 901  
Other direct production costs 10,110 10,325  
Depreciation, depletion and amortization 15,983 13,589  
Gross profit 168,641 48,505  
Capital additions 6,113 10,759  
Identifiable assets 707,216   640,011
Greens Creek [Member] | MetalSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 250,999 118,143  
Greens Creek [Member] | EnvironmentalRemediationServices [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Greens Creek [Member] | IntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Greens Creek [Member] | ReconciliationOfSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 250,999 118,143  
Greens Creek [Member] | EliminationOfIntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Lucky Friday [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Salaries, wages and other benefits 20,523 14,776  
Contractors 3,956 3,863  
Materials And Consumables 10,445 11,423  
Product inventory change (293) 1,182  
Other direct production costs 542 (620)  
Depreciation, depletion and amortization 13,609 13,425  
Gross profit 60,574 19,145  
Capital additions 17,018 15,446  
Identifiable assets 681,365   688,997
Lucky Friday [Member] | MetalSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 109,356 63,194  
Lucky Friday [Member] | EnvironmentalRemediationServices [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Lucky Friday [Member] | IntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Lucky Friday [Member] | ReconciliationOfSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 109,356 63,194  
Lucky Friday [Member] | EliminationOfIntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Keno Hill [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Salaries, wages and other benefits 8,897 6,472  
Contractors 2,251 3,551  
Materials And Consumables 7,273 5,994  
Product inventory change (3,218) (7,962)  
Other direct production costs 2,720 5,014  
Depreciation, depletion and amortization 4,176 2,802  
Gross profit 24,327 1,038  
Capital additions 15,025 10,436  
Identifiable assets 492,688   505,205
Keno Hill [Member] | MetalSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 46,426 16,909  
Keno Hill [Member] | EnvironmentalRemediationServices [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Keno Hill [Member] | IntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 1,639 986  
Keno Hill [Member] | ReconciliationOfSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 48,065 17,895  
Keno Hill [Member] | EliminationOfIntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales (1,639) (986)  
Other [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Salaries, wages and other benefits 178 58  
Contractors 4,640 6,931  
Materials And Consumables 94 106  
Product inventory change 0 0  
Other direct production costs 27 0  
Depreciation, depletion and amortization 0 0  
Gross profit (287) (7)  
Capital additions 1,109 1,197  
Identifiable assets 1,495,024   $ 974,703
Other [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Salaries, wages and other benefits 50,002    
Contractors 8,912    
Materials And Consumables 45,313    
Product inventory change 1,872    
Other direct production costs 13,372    
Depreciation, depletion and amortization 33,768    
Gross profit 253,542    
Capital additions 38,156    
Other [Member] | MetalSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Other [Member] | MetalSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 406,781    
Other [Member] | EnvironmentalRemediationServices [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 4,652    
Other [Member] | EnvironmentalRemediationServices [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0    
Other [Member] | IntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 0  
Other [Member] | IntersegmentSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 1,639    
Other [Member] | ReconciliationOfSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 4,652 7,088  
Other [Member] | ReconciliationOfSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 408,420    
Other [Member] | EliminationOfIntersegmentSales [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales 0 $ 0  
Other [Member] | EliminationOfIntersegmentSales [Member] | Operating Segments [Member]      
Segment Reporting, Revenue Reconciling Item [Line Items]      
Total sales $ (1,639)    
[1] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, and other operating (income) expense, net.
[2] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, and other operating (income) expense, net.