Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Sep. 30, 2025		Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024	Dec. 31, 2024
Financial information relating to reporting segments
Revenue		$ 554,567		$ 313,476	$ 1,395,279		$ 748,562
Amortization		72,930		33,216	177,444		88,441
Other operating expenses		30,673		19,549	87,949	[1]	72,012
Costs and Expenses		377,480		229,074	1,015,928		650,841
Income from operations		177,087		84,402	379,351		97,721
(Gain) loss on debt extinguishment		(6)		0	(6)		417
Fair value adjustments, net, pretax		0		0	(342)		0
Interest Income (Expense), Nonoperating		(6,273)		(13,280)	(24,974)		(39,389)
Other, net	[2]	(865)		3,434	1,001		11,329
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		169,943		74,556	355,030		70,078
Income and mining tax (expense) benefit		96,881		(25,817)	15,873		(49,030)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		266,824		48,739	370,903		21,048
Assets, Net		3,927,317	[3]	2,083,269	3,927,317	[3]	2,083,269	$ 2,161,881
Capital expenditures		49,034		41,980	159,843		135,468
Las Chispas
Financial information relating to reporting segments
Amortization		30,908			62,219
Other operating expenses	[1]	660			1,652
Costs and Expenses		102,198			240,222
Income from operations		23,936			46,581
(Gain) loss on debt extinguishment		0			0
Fair value adjustments, net, pretax					0
Interest Income (Expense), Nonoperating		35			36
Other, net	[2]	953			2,185
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		24,854			48,730
Income and mining tax (expense) benefit		(16,611)			(53,669)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		8,243			(4,939)
Assets, Net	[3]	1,689,818			1,689,818
Capital expenditures		9,751			24,289
Palmarejo
Financial information relating to reporting segments
Amortization		10,115		11,984	28,702		35,429
Other operating expenses		1,909		2,650	6,527	[1]	7,350
Costs and Expenses		68,762		66,392	192,247		202,121
Income from operations		52,431		43,985	138,891		87,880
(Gain) loss on debt extinguishment		0		0	0		0
Fair value adjustments, net, pretax				0	0		0
Interest Income (Expense), Nonoperating		119		(30)	(188)		341
Other, net		(796)		1,256	(2,748)	[2]	4,683
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		51,516		45,211	135,955		92,904
Income and mining tax (expense) benefit		(21,534)		(18,919)	(42,048)		(37,913)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		29,982		26,292	93,907		54,991
Assets, Net		306,416	[3]	320,271	306,416	[3]	320,271
Capital expenditures		5,690		8,048	17,190		20,680
Rochester
Financial information relating to reporting segments
Amortization		18,501		10,231	50,156		25,434
Other operating expenses		3,701		2,459	9,106	[1]	11,035
Costs and Expenses		77,365		53,143	213,580		141,984
Income from operations		35,090		2,838	76,478		(13,410)
(Gain) loss on debt extinguishment		(6)		0	(6)		0
Fair value adjustments, net, pretax				0	(342)		0
Interest Income (Expense), Nonoperating		2,490		(1,113)	7,363		(3,508)
Other, net		(106)		(140)	(346)	[2]	(256)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		32,488		1,585	68,421		(17,174)
Income and mining tax (expense) benefit		(4,975)		(283)	(9,409)		623
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		27,513		1,302	59,012		(16,551)
Assets, Net		1,264,175	[3]	1,180,633	1,264,175	[3]	1,180,633
Capital expenditures		11,567		10,121	50,886		58,894
Kensington
Financial information relating to reporting segments
Amortization		10,435		7,612	28,127		19,653
Other operating expenses		6,073		636	7,265	[1]	9,391
Costs and Expenses		65,426		48,335	177,385		151,977
Income from operations		33,464		13,817	76,514		4,748
(Gain) loss on debt extinguishment		0		0	0		0
Fair value adjustments, net, pretax				0	0		0
Interest Income (Expense), Nonoperating		71		(245)	328		(1,215)
Other, net		(104)		(80)	(365)	[2]	(243)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		33,289		13,492	75,821		3,290
Income and mining tax (expense) benefit		3,673		0	788		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		36,962		13,492	76,609		3,290
Assets, Net		255,204	[3]	208,858	255,204	[3]	208,858
Capital expenditures		15,595		19,996	47,386		49,731
Wharf
Financial information relating to reporting segments
Amortization		1,762		2,419	4,785		4,879
Other operating expenses		2,213		1,165	4,519	[1]	3,410
Costs and Expenses		35,648		37,693	103,115		88,176
Income from operations		60,247		47,273	130,266		85,086
(Gain) loss on debt extinguishment		0		0	0		0
Fair value adjustments, net, pretax				0	0		0
Interest Income (Expense), Nonoperating		27		(128)	144		(405)
Other, net		(53)		(37)	(125)	[2]	(124)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		60,167		47,108	129,997		84,557
Income and mining tax (expense) benefit		(16,367)		(4,164)	(28,230)		(7,172)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		43,800		42,944	101,767		77,385
Assets, Net		124,540	[3]	107,526	124,540	[3]	107,526
Capital expenditures		3,175		2,773	14,130		4,237
Silvertip [Member]
Financial information relating to reporting segments
Amortization		989		794	2,863		2,436
Other operating expenses		3,084		2,037	9,091	[1]	7,146
Costs and Expenses		14,138		12,236	37,354		30,712
Income from operations		(14,138)		(12,236)	(37,354)		(30,712)
(Gain) loss on debt extinguishment		0		0	0		0
Fair value adjustments, net, pretax				0	0		0
Interest Income (Expense), Nonoperating		0		(1)	0		(11)
Other, net		(85)		52	(72)	[2]	12
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		(14,223)		(12,185)	(37,426)		(30,711)
Income and mining tax (expense) benefit		0		0	0		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(14,223)		(12,185)	(37,426)		(30,711)
Assets, Net		222,099	[3]	212,607	222,099	[3]	212,607
Capital expenditures		2,618		1,035	5,000		1,894
Other Mining Properties [Member]
Financial information relating to reporting segments
Amortization		220		176	592		610
Other operating expenses		13,033		10,602	49,789	[1]	33,680
Costs and Expenses		13,943		11,275	52,025		35,871
Income from operations		(13,943)		(11,275)	(52,025)		(35,871)
(Gain) loss on debt extinguishment		0		0	0		417
Fair value adjustments, net, pretax				0	0		0
Interest Income (Expense), Nonoperating		3,531		(11,763)	16,915		(34,591)
Other, net		(674)		2,383	2,472	[2]	7,257
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		(18,148)		(20,655)	(66,468)		(62,788)
Income and mining tax (expense) benefit		152,695		(2,451)	148,441		(4,568)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		134,547		(23,106)	81,973		(67,356)
Assets, Net		65,065	[3]	53,374	65,065	[3]	53,374
Capital expenditures		638		7	962		32
Gold [Member]
Financial information relating to reporting segments
Revenue		360,484		223,772	918,925		529,626
Gold [Member] | Las Chispas
Financial information relating to reporting segments
Revenue		61,005			142,012
Gold [Member] | Palmarejo
Financial information relating to reporting segments
Revenue		57,553		55,085	157,315		151,398
Gold [Member] | Rochester
Financial information relating to reporting segments
Revenue		47,945		22,889	135,995		52,938
Gold [Member] | Kensington
Financial information relating to reporting segments
Revenue		98,931		62,164	253,864		156,753
Gold [Member] | Wharf
Financial information relating to reporting segments
Revenue		95,050		83,634	229,739		168,537
Gold [Member] | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0		0	0		0
Gold [Member] | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0		0	0		0
Product, Silver
Financial information relating to reporting segments
Revenue		194,083		89,704	476,354		218,936
Product, Silver | Las Chispas
Financial information relating to reporting segments
Revenue		65,129			144,791
Product, Silver | Palmarejo
Financial information relating to reporting segments
Revenue		63,640		55,292	173,823		138,603
Product, Silver | Rochester
Financial information relating to reporting segments
Revenue		64,510		33,092	154,063		75,636
Product, Silver | Kensington
Financial information relating to reporting segments
Revenue		(41)		(12)	35		(28)
Product, Silver | Wharf
Financial information relating to reporting segments
Revenue		845		1,332	3,642		4,725
Product, Silver | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0		0	0		0
Product, Silver | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0		0	0		0
Product, Metal [Member]
Financial information relating to reporting segments
Revenue		554,567		313,476	1,395,279		748,562
Product, Metal [Member] | Las Chispas
Financial information relating to reporting segments
Revenue		126,134			286,803
Product, Metal [Member] | Palmarejo
Financial information relating to reporting segments
Revenue		121,193		110,377	331,138		290,001
Product, Metal [Member] | Rochester
Financial information relating to reporting segments
Revenue		112,455		55,981	290,058		128,574
Product, Metal [Member] | Kensington
Financial information relating to reporting segments
Revenue		98,890		62,152	253,899		156,725
Product, Metal [Member] | Wharf
Financial information relating to reporting segments
Revenue		95,895		84,966	233,381		173,262
Product, Metal [Member] | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0		0	0		0
Product, Metal [Member] | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0		0	0		0
Product
Financial information relating to reporting segments
Costs applicable to sales	[4]	248,736		156,742	682,456		447,456
Product | Las Chispas
Financial information relating to reporting segments
Costs applicable to sales	[4]	68,104			168,685
Product | Palmarejo
Financial information relating to reporting segments
Costs applicable to sales		51,010		47,455	143,416	[4]	149,976
Product | Rochester
Financial information relating to reporting segments
Costs applicable to sales		51,986		39,409	148,450	[4]	103,063
Product | Kensington
Financial information relating to reporting segments
Costs applicable to sales		46,709		38,099	134,948	[4]	118,109
Product | Wharf
Financial information relating to reporting segments
Costs applicable to sales		30,927		31,779	86,957	[4]	76,308
Product | Silvertip [Member]
Financial information relating to reporting segments
Costs applicable to sales		0		0	0	[4]	0
Product | Other Mining Properties [Member]
Financial information relating to reporting segments
Costs applicable to sales		0		0	0	[4]	0
Mineral, Exploration
Financial information relating to reporting segments
Costs applicable to sales		25,141		19,567	68,079		42,932
Mineral, Exploration | Las Chispas
Financial information relating to reporting segments
Costs applicable to sales		2,526			7,666
Mineral, Exploration | Palmarejo
Financial information relating to reporting segments
Costs applicable to sales		5,728		4,303	13,602		9,366
Mineral, Exploration | Rochester
Financial information relating to reporting segments
Costs applicable to sales		3,177		1,044	5,868		2,452
Mineral, Exploration | Kensington
Financial information relating to reporting segments
Costs applicable to sales		2,209		1,988	7,045		4,824
Mineral, Exploration | Wharf
Financial information relating to reporting segments
Costs applicable to sales		746		2,330	6,854		3,579
Mineral, Exploration | Silvertip [Member]
Financial information relating to reporting segments
Costs applicable to sales		10,065		9,405	25,400		21,130
Mineral, Exploration | Other Mining Properties [Member]
Financial information relating to reporting segments
Costs applicable to sales		$ 690		$ 497	$ 1,644		$ 1,581

[1] Other operating expenses include General and administrative and Pre-development, reclamation, and other

[2] See Note 14 -- Additional Comprehensive Income (Loss) Detail for additional detail.

[3] Segment assets include receivables, prepaids, inventories, property, plant and equipment, mineral interests, and goodwill

[4] Excludes amortization.