Fair Value Measurements - Summary of Level 3 Financial Assets and Liabilities (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024	Dec. 31, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		$ 2,070,126		$ 1,054,006	$ 821,206
Amortization		251,099		124,974	99,822
Other operating expenses		126,985	[1]	99,000	96,241
Fair value adjustments, net, pretax		(342)		0	3,384
Other, net	[2]	6,922		13,027	(7,463)
Income and mining tax (expense) benefit		(96,666)		(67,450)	(35,156)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		585,872		58,900	(103,612)
Total assets for reportable segments		3,928,905	[3]	2,161,881	1,943,037
Payments to Acquire Productive Assets		221,162		183,188	364,617
Palmarejo
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization		37,015		44,979	35,709
Other operating expenses		7,691	[1]	8,665	8,064
Fair value adjustments, net, pretax		0		0	0
Other, net		(5,615)	[2]	7,074	4,590
Income and mining tax (expense) benefit		(103,526)		(45,765)	(26,016)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		109,418		78,361	46,703
Total assets for reportable segments		311,672		316,232	312,879
Payments to Acquire Productive Assets		25,534		30,621	41,766
Rochester
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization		69,283		41,293	26,392
Other operating expenses		12,155	[1]	12,963	26,005
Fair value adjustments, net, pretax		(342)		0	0
Other, net		(446)	[2]	(363)	(293)
Income and mining tax (expense) benefit		(9,004)		(1,778)	(816)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		139,546		(5,347)	(71,579)
Total assets for reportable segments		1,280,017		1,227,745	1,081,442
Payments to Acquire Productive Assets		65,750		72,676	263,401
Kensington
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization		39,295		28,201	25,905
Other operating expenses		7,930	[1]	9,753	3,440
Fair value adjustments, net, pretax		0		0	0
Other, net		(459)	[2]	(312)	(311)
Income and mining tax (expense) benefit		(1,687)		(576)	0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		141,141		21,355	(29,481)
Total assets for reportable segments		263,614		223,525	171,602
Payments to Acquire Productive Assets		65,635		68,656	53,316
Wharf
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization		6,558		6,487	6,694
Other operating expenses		5,692	[1]	4,519	4,157
Fair value adjustments, net, pretax				0	0
Other, net		(178)	[2]	(509)	(396)
Income and mining tax (expense) benefit		(19,098)		(10,679)	(7,047)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		183,151		106,709	56,219
Total assets for reportable segments		121,986		119,407	102,245
Payments to Acquire Productive Assets		17,802		7,175	2,472
Silvertip
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization		3,903		3,235	4,018
Other operating expenses		12,338	[1]	9,923	17,104
Fair value adjustments, net, pretax		0		0	0
Other, net		(83)	[2]	(43)	(129)
Income and mining tax (expense) benefit		0		0	0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(47,489)		(40,544)	(33,565)
Total assets for reportable segments		220,285		219,613	215,545
Payments to Acquire Productive Assets		7,112		3,597	2,867
Other Mining Properties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Amortization		832		779	1,104
Other operating expenses		79,017	[1]	53,177	37,471
Fair value adjustments, net, pretax		0		0	3,384
Other, net		1,479	[2]	7,180	(10,924)
Income and mining tax (expense) benefit		114,832		(8,652)	(1,277)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		13,244		(101,634)	(71,909)
Total assets for reportable segments		69,766	[3]	55,359	59,324
Payments to Acquire Productive Assets		1,180		463	795
Gold sales
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		1,343,729		734,861	575,677
Gold sales | Palmarejo
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		218,064		190,520	155,036
Gold sales | Rochester
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		210,680		91,541	75,571
Gold sales | Kensington
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		377,693		225,200	162,010
Gold sales | Wharf
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		334,058		227,600	183,060
Gold sales | Silvertip
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		0		0	0
Gold sales | Other Mining Properties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		0		0	0
Silver sales
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		726,397		319,145	245,529
Silver sales | Palmarejo
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		255,700		188,540	158,171
Silver sales | Rochester
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		247,362		124,271	80,451
Silver sales | Kensington
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		17		(71)	468
Silver sales | Wharf
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		5,121		6,405	6,439
Silver sales | Silvertip
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		0		0	0
Silver sales | Other Mining Properties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		0		0	0
Metal sales
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		2,070,126		1,054,006	821,206
Metal sales | Palmarejo
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		473,764		379,060	313,207
Metal sales | Rochester
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		458,042		215,812	156,022
Metal sales | Kensington
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		377,710		225,129	162,478
Metal sales | Wharf
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		339,179		234,005	189,499
Metal sales | Silvertip
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		0		0	0
Metal sales | Other Mining Properties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Revenue		0		0	0
Product
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales	[4]	898,437		606,192	632,896
Product | Palmarejo
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		191,657	[4]	195,458	194,309
Product | Rochester
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		209,114	[4]	154,611	171,271
Product | Kensington
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		179,054	[4]	157,757	152,659
Product | Wharf
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		116,928	[4]	98,366	114,657
Product | Silvertip
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		0	[4]	0	0
Product | Other Mining Properties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		0	[4]	0	0
Mineral, Exploration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		86,592		59,658	30,962
Mineral, Exploration | Palmarejo
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		18,527		13,230	7,840
Mineral, Exploration | Rochester
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		8,566		5,070	1,221
Mineral, Exploration | Kensington
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		7,776		5,494	7,900
Mineral, Exploration | Wharf
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		7,416		6,192	0
Mineral, Exploration | Silvertip
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		31,165		27,332	12,251
Mineral, Exploration | Other Mining Properties
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Costs applicable to sales		$ 2,721		$ 2,340	$ 1,750

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

[2] See Note 15 -- 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.