Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended								9 Months Ended
		Sep. 30, 2021		Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020		Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021		Sep. 30, 2020		Dec. 31, 2020
Financial information relating to reporting segments
Revenue		$ 207,969				$ 229,728				$ 624,944		$ 557,144
Amortization		30,962				32,216				92,872		96,254
Other operating expenses		19,249				22,788				67,720		65,554
Loss on debt extinguishments		0				0				(9,173)		0
Fair value adjustments, net, pretax		(26,440)				2,243				7,000		3,491
Interest expense, net of capitalized interest		(3,237)				(5,096)				(13,240)		(15,989)
Other, net	[1]	(26,718)				(6,312)				(22,390)		(4,310)
Income and mining tax (expense) benefit		(6,400)				(13,113)				(34,526)		(12,018)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(54,768)				26,856				(20,562)		13,747
NET INCOME (LOSS)		(54,768)		$ 32,146	$ 2,060	26,856		$ (1,209)	$ (11,900)	(20,562)		13,747
Assets, Net		1,327,344	[2]			1,207,851	[2]			1,327,344	[2]	1,207,851	[2]	$ 1,232,153
Capital expenditures		71,266				22,996				208,913		61,886
Palmarejo [Member]
Financial information relating to reporting segments
Amortization		8,747				11,912				26,077		32,357
Other operating expenses		855				2,378				3,578		6,279
Loss on debt extinguishments										0
Fair value adjustments, net, pretax		0				0				0		0
Interest expense, net of capitalized interest		(135)				(201)				(471)		(667)
Other, net	[1]	(26,868)				(1,168)				(27,904)		(2,866)
Income and mining tax (expense) benefit		(10,702)				(6,841)				(29,601)		(7,938)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(14,453)				23,026				31,169		50,534
Assets, Net	[2]	285,277				302,599				285,277		302,599
Capital expenditures		8,506				4,998				28,284		16,611
Rochester [Member]
Financial information relating to reporting segments
Amortization		4,671				3,278				14,754		9,194
Other operating expenses		1,433				1,376				4,325		3,835
Loss on debt extinguishments										0
Fair value adjustments, net, pretax		0				0				0		0
Interest expense, net of capitalized interest		(149)				(283)				(851)		(851)
Other, net	[1]	(99)				(2,502)				(252)		(2,580)
Income and mining tax (expense) benefit		1,108				(143)				937		(186)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(10,982)				4,959				(17,613)		(1,413)
Assets, Net	[2]	496,940				325,165				496,940		325,165
Capital expenditures		40,056				9,773				112,505		20,634
Kensington
Financial information relating to reporting segments
Amortization		12,786				11,523				38,941		36,298
Other operating expenses		515				3,448				5,783		7,298
Loss on debt extinguishments										0
Fair value adjustments, net, pretax		0				0				0		0
Interest expense, net of capitalized interest		(194)				(296)				(568)		(819)
Other, net	[1]	(62)				(34)				(104)		1
Income and mining tax (expense) benefit		(65)				(380)				(1,106)		(854)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		1,002				1,749				8,384		13,767
Assets, Net	[2]	149,774				177,700				149,774		177,700
Capital expenditures		6,272				5,333				19,519		14,050
Wharf [Member]
Financial information relating to reporting segments
Amortization		3,158				4,000				8,627		9,625
Other operating expenses		539				127				1,249		451
Loss on debt extinguishments										0
Fair value adjustments, net, pretax		0				0				0		0
Interest expense, net of capitalized interest		(39)				(48)				(122)		(149)
Other, net	[1]	460				7				1,112		(12)
Income and mining tax (expense) benefit		(2,014)				(2,630)				(4,437)		(4,806)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		18,747				28,287				45,877		45,975
Assets, Net	[2]	73,019				76,247				73,019		76,247
Capital expenditures		1,045				545				3,928		1,219
Silvertip [Member]
Financial information relating to reporting segments
Amortization		1,258				1,185				3,529		7,761
Other operating expenses		6,090				5,916				18,609		17,770
Loss on debt extinguishments										0
Fair value adjustments, net, pretax		0				0				0		0
Interest expense, net of capitalized interest		396				(124)				622		(603)
Other, net	[1]	(124)				451				(463)		2,005
Income and mining tax (expense) benefit		0				21				0		(234)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(11,668)				(10,673)				(33,098)		(47,210)
Assets, Net	[2]	209,498				155,932				209,498		155,932
Capital expenditures		15,099				2,065				44,011		8,630
Other Mining Properties [Member]
Financial information relating to reporting segments
Amortization		342				318				944		1,019
Other operating expenses		9,817				9,543				34,176		29,921
Loss on debt extinguishments										(9,173)
Fair value adjustments, net, pretax		(26,440)				2,243				7,000		3,491
Interest expense, net of capitalized interest		(3,116)				(4,144)				(11,850)		(12,900)
Other, net	[1]	(25)				(3,066)				5,221		(858)
Income and mining tax (expense) benefit		5,273				(3,140)				(319)		2,000
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(37,414)				(20,492)				(55,281)		(47,906)
Assets, Net	[2]	112,836				170,208				112,836		170,208
Capital expenditures		288				282				666		742
Gold [Member]
Financial information relating to reporting segments
Revenue		147,730				167,132				432,210		422,639
Gold [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Revenue		33,237				39,416				112,036		104,732
Gold [Member] | Rochester [Member]
Financial information relating to reporting segments
Revenue		9,923				12,860				36,389		30,508
Gold [Member] | Kensington
Financial information relating to reporting segments
Revenue		51,881				52,357				155,154		159,200
Gold [Member] | Wharf [Member]
Financial information relating to reporting segments
Revenue		52,689				62,499				128,631		128,199
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		60,239				62,596				192,734		133,852
Product, Silver | Palmarejo [Member]
Financial information relating to reporting segments
Revenue		41,410				42,339				127,990		89,332
Product, Silver | Rochester [Member]
Financial information relating to reporting segments
Revenue		18,402				19,250				62,778		41,650
Product, Silver | Kensington
Financial information relating to reporting segments
Revenue		0				0				0		0
Product, Silver | Wharf [Member]
Financial information relating to reporting segments
Revenue		427				1,007				1,966		1,640
Product, Silver | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0				0				0		1,230
Product, Silver | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0				0				0		0
Product, Zinc
Financial information relating to reporting segments
Revenue						0						(662)
Product, Zinc | Palmarejo [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Zinc | Rochester [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Zinc | Kensington
Financial information relating to reporting segments
Revenue						0						0
Product, Zinc | Wharf [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Zinc | Silvertip [Member]
Financial information relating to reporting segments
Revenue						0						(662)
Product, Zinc | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Lead
Financial information relating to reporting segments
Revenue						0						1,315
Product, Lead | Palmarejo [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Lead | Rochester [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Lead | Kensington
Financial information relating to reporting segments
Revenue						0						0
Product, Lead | Wharf [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Lead | Silvertip [Member]
Financial information relating to reporting segments
Revenue						0						1,315
Product, Lead | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue						0						0
Product, Metal [Member]
Financial information relating to reporting segments
Revenue		207,969				229,728				624,944		557,144
Product, Metal [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Revenue		74,647				81,755				240,026		194,064
Product, Metal [Member] | Rochester [Member]
Financial information relating to reporting segments
Revenue		28,325				32,110				99,167		72,158
Product, Metal [Member] | Kensington
Financial information relating to reporting segments
Revenue		51,881				52,357				155,154		159,200
Product, Metal [Member] | Wharf [Member]
Financial information relating to reporting segments
Revenue		53,116				63,506				130,597		129,839
Product, Metal [Member] | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0				0				0		1,883
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	[3]	134,340				112,772				375,082		321,704
Product | Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales	[3]	39,016				34,251				114,922		89,050
Product | Rochester [Member]
Financial information relating to reporting segments
Costs applicable to sales	[3]	31,669				19,104				93,733		54,396
Product | Kensington
Financial information relating to reporting segments
Costs applicable to sales	[3]	34,576				31,530				95,173		92,419
Product | Wharf [Member]
Financial information relating to reporting segments
Costs applicable to sales	[3]	29,079				27,887				71,254		68,182
Product | Silvertip [Member]
Financial information relating to reporting segments
Costs applicable to sales	[3]	0				0				0		17,657
Product | Other Mining Properties [Member]
Financial information relating to reporting segments
Costs applicable to sales	[3]	0				0				0		0
Mineral, Exploration
Financial information relating to reporting segments
Costs applicable to sales		15,391				12,818				37,503		31,059
Mineral, Exploration | Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales		2,777				1,978				6,304		4,373
Mineral, Exploration | Rochester [Member]
Financial information relating to reporting segments
Costs applicable to sales		2,394				465				3,802		2,529
Mineral, Exploration | Kensington
Financial information relating to reporting segments
Costs applicable to sales		2,681				3,397				5,095		7,746
Mineral, Exploration | Wharf [Member]
Financial information relating to reporting segments
Costs applicable to sales		0				534				143		639
Mineral, Exploration | Silvertip [Member]
Financial information relating to reporting segments
Costs applicable to sales		4,592				3,920				11,119		7,073
Mineral, Exploration | Other Mining Properties [Member]
Financial information relating to reporting segments
Costs applicable to sales		$ 2,947				$ 2,524				$ 11,040		$ 8,699

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

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

[3] Excludes amortization.