Note 4 -Business Segments, Sales of Products and Significant Customers - Schedule of Information About Reportable Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025		Dec. 31, 2024		Dec. 31, 2023
Segment Reporting Information [Line Items]
Total consolidated sales	$ 1,423,019		$ 929,925		$ 720,227
Salaries, wages and other benefits	218,868		202,078		187,124
Contractors	111,341		86,927		58,107
Materials and consumables	235,832		218,320		184,634
Product inventory change	2,926		(8,941)		14,299
Other direct production costs	71,832		78,822		72,945
Transfer to ramp-up and suspension costs			(28,961)	[1]	(58,605)	[2]
Depreciation, depletion and amortization	160,017		183,470		148,774
Gross profit	622,203		198,210		112,949
Other segment items	107,408	[3]	91,934	[4]	157,623	[5]
Income (loss) from operations	514,795		106,276		(44,674)
Interest expense	(41,581)		(49,834)		(43,319)
Fair value adjustments, net	12,455		(2,204)		2,925
Foreign exchange (loss) gain, net	(5,764)		7,552		(3,810)
Other income	(726)		4,426		5,883
Income (loss) before income and mining taxes	479,179		66,216		(82,995)
Capital additions	252,389		214,492		223,887
Identifiable assets	3,560,645		2,981,060		3,011,104
Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	1,383,901		909,369		714,944
Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	39,118		20,556		5,283
Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	6,123		3,834		0
Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	1,429,142		933,759		720,227
Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	(6,123)		(3,834)		0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	218,272		201,872		184,095
Contractors	74,046		67,231		56,982
Materials and consumables	235,153		217,695		183,028
Product inventory change	2,926		(8,941)		14,030
Other direct production costs	71,828		78,822		71,738
Transfer to ramp-up and suspension costs			(28,961)	[1]	(57,569)	[2]
Depreciation, depletion and amortization	160,017		183,470		148,634
Gross profit	621,659		198,181		113,046
Capital additions	247,256		212,960		223,607
Identifiable assets	2,611,160		2,253,341		2,193,500
Operating Segments [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	1,383,901		909,369		713,984
Operating Segments [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Operating Segments [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	6,123		3,834		0
Operating Segments [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	1,390,024		913,203		713,984
Operating Segments [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	(6,123)		(3,834)
Greens Creek [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	75,888		69,990		68,183
Contractors	7,425		6,135		5,917
Materials and consumables	106,959		93,223		89,850
Product inventory change	1,258		5,858		4,266
Other direct production costs	42,691		39,471		37,684
Transfer to ramp-up and suspension costs			0	[1]	0	[2]
Depreciation, depletion and amortization	55,959		53,450		53,995
Gross profit	322,647		153,447		124,609
Capital additions	54,617		47,795		43,542
Identifiable assets	640,011		564,334		569,369
Greens Creek [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	612,827		421,574		384,504
Greens Creek [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Greens Creek [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Greens Creek [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	612,827		421,574		384,504
Lucky Friday [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	63,134		52,879		43,142
Contractors	15,628		14,154		8,681
Materials and consumables	44,817		39,957		27,030
Product inventory change	346		(2,628)		8,014
Other direct production costs	(1,290)		(1,281)		(1,460)
Transfer to ramp-up and suspension costs			(2,207)	[1]	(25,548)	[2]
Depreciation, depletion and amortization	51,055		41,049		24,325
Gross profit	132,950		58,669		32,100
Capital additions	72,933		49,592		65,337
Identifiable assets	688,997		587,945		578,110
Lucky Friday [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	306,640		203,154		116,284
Lucky Friday [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Lucky Friday [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Lucky Friday [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	306,640		203,154		116,284
Keno Hill [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	28,459		29,658		21,569
Contractors	14,746		22,960		10,472
Materials and consumables	27,300		28,648		18,018
Product inventory change	(1,452)		(8,902)		(1,163)
Other direct production costs	2,830		13,216		12,138
Transfer to ramp-up and suspension costs			(26,754)	[1]	(29,793)	[2]
Depreciation, depletion and amortization	19,769		16,136		4,277
Gross profit	53,665		0		0
Capital additions	58,192		54,869		44,672
Identifiable assets	505,205		413,982		362,986
Keno Hill [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	145,317		74,962		35,518
Keno Hill [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Keno Hill [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	6,123		3,834		0
Keno Hill [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	151,440		78,796		35,518
Keno Hill [Member] | Elimination of Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	(6,123)		(3,834)
Casa Berardi [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	50,791		49,345		51,201
Contractors	36,247		23,982		31,912
Materials and consumables	56,077		55,867		48,130
Product inventory change	2,774		(3,269)		2,913
Other direct production costs	27,597		24,854		23,376
Transfer to ramp-up and suspension costs			0	[1]	2,228	[2]
Depreciation, depletion and amortization	33,234		72,835		66,037
Gross profit	112,397		(13,935)		(43,663)
Capital additions	61,514		60,704		70,056
Identifiable assets	776,947		687,080		683,035
Casa Berardi [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	319,117		209,679		177,678
Casa Berardi [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Casa Berardi [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Casa Berardi [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	319,117		209,679		177,678
Other [Member]
Segment Reporting Information [Line Items]
Salaries, wages and other benefits	596		206		3,029
Contractors	37,295		19,696		1,125
Materials and consumables	679		625		1,606
Product inventory change	0		0		269
Other direct production costs	4		0		(1,207)
Transfer to ramp-up and suspension costs			0	[1]	1,036	[2]
Depreciation, depletion and amortization	0		0		140
Gross profit	544		(29)		(97)
Capital additions	5,133		1,532		280
Identifiable assets	949,485		727,719		817,604
Other [Member] | Metal Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		960
Other [Member] | Environmental Remediation Services [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	39,118		20,556		5,283
Other [Member] | Intersegment Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	0		0		0
Other [Member] | Reconciliation of Sales [Member]
Segment Reporting Information [Line Items]
Total consolidated sales	$ 39,118		$ 20,556		$ 6,243

[1] Total cost of sales in excess of sales value are transferred to ramp-up and suspension costs.

[2] Total cost of sales in excess of sales value are transferred to ramp-up and suspension costs.

[3] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.

[4] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.   Lucky Friday's income from operations for 2024 includes $50.0 million of business interruption and property damage insurance proceeds received during the respective periods related to the fire which suspended Lucky Friday's operations from August 2023 through January 8, 2024. The insurance proceeds received are recorded as part of "Other operating (income) expense, net" in our Consolidated Statements of Operations and Comprehensive Income (Loss).   During 2024, the Company wrote down $14.6 million of property, plant and mine development which had no salvage value. Of this amount, $13.9 million is included in Lucky Friday's income from operations and is related to the remote vein miner machine for which (i) we no longer had a use following the success of the Underhand Closed Bench mining method, (ii) we had been unsuccessful in locating a buyer, and (iii) the vendor advised us during the period that it would discontinue support for the program. The write down is recorded as part of "Write down of Property, Plant and Mine Development" in our Consolidated Statements of Operations and Comprehensive Income (Loss).

[5] Other operating expense items include general and administrative, exploration and pre-development, ramp-up and suspension costs, provision for closed operations and environmental matters, write-down of property, plant and equipment and other operating (income) expense, net.