Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021		Mar. 31, 2020		Dec. 31, 2020
Financial information relating to reporting segments
Revenue		$ 202,117		$ 173,167
Amortization		29,937		36,162
Other operating expenses		25,266		15,475
Loss on debt extinguishments		(9,173)		0
Fair value adjustments, net, pretax		(3,799)		(8,819)
Interest expense, net of capitalized interest		(4,910)		(5,128)
Other, net		3,627		1,881
Income and mining tax (expense) benefit		(12,786)		3,939
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		2,060		(11,900)
NET INCOME (LOSS)		2,060		(11,900)
Assets, Net		1,283,284	[1]	1,203,594	[1]	$ 1,232,153
Capital expenditures		59,424		22,208
Palmarejo [Member]
Financial information relating to reporting segments
Amortization		9,059		13,175
Other operating expenses		1,270		722
Loss on debt extinguishments		0		0
Fair value adjustments, net, pretax		0		0
Interest expense, net of capitalized interest		(187)		(155)
Other, net		(665)		(47)
Income and mining tax (expense) benefit		(11,340)		2,287
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		22,143		25,061
Assets, Net	[1]	306,648		307,662
Capital expenditures		9,983		7,080
Rochester [Member]
Financial information relating to reporting segments
Amortization		3,577		2,904
Other operating expenses		1,448		1,246
Loss on debt extinguishments		0		0
Fair value adjustments, net, pretax		0		0
Interest expense, net of capitalized interest		(222)		(268)
Other, net		(61)		(53)
Income and mining tax (expense) benefit		(138)		(43)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		2,806		(2,285)
Assets, Net	[1]	388,047		295,972
Capital expenditures		30,177		5,058
Kensington
Financial information relating to reporting segments
Amortization		13,445		11,922
Other operating expenses		2,995		331
Loss on debt extinguishments		0		0
Fair value adjustments, net, pretax		0		0
Interest expense, net of capitalized interest		(232)		(309)
Other, net		0		71
Income and mining tax (expense) benefit		(334)		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		4,957		6,896
Assets, Net	[1]	162,727		188,470
Capital expenditures		7,202		4,808
Wharf [Member]
Financial information relating to reporting segments
Amortization		2,475		2,444
Other operating expenses		185		442
Loss on debt extinguishments		0		0
Fair value adjustments, net, pretax		0		0
Interest expense, net of capitalized interest		(37)		(51)
Other, net		24		(13)
Income and mining tax (expense) benefit		(1,129)		(475)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		11,948		4,622
Assets, Net	[1]	79,018		85,531
Capital expenditures		1,481		409
Silvertip [Member]
Financial information relating to reporting segments
Amortization		1,086		5,345
Other operating expenses		6,555		2,374
Loss on debt extinguishments		0		0
Fair value adjustments, net, pretax		0		0
Interest expense, net of capitalized interest		45		(259)
Other, net		(102)		1,130
Income and mining tax (expense) benefit		0		0
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(10,630)		(22,873)
Assets, Net	[1]	169,328		161,214
Capital expenditures		10,387		4,616
Other Mining Properties [Member]
Financial information relating to reporting segments
Amortization		295		372
Other operating expenses		12,813		10,360
Loss on debt extinguishments		(9,173)		0
Fair value adjustments, net, pretax		(3,799)		(8,819)
Interest expense, net of capitalized interest		(4,277)		(4,086)
Other, net		4,431		793
Income and mining tax (expense) benefit		155		2,170
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		(29,164)		(23,321)
Assets, Net	[1]	177,516		164,745
Capital expenditures		194		237
Gold [Member]
Financial information relating to reporting segments
Revenue		138,322		127,605
Gold [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Revenue		37,567		41,647
Gold [Member] | Rochester [Member]
Financial information relating to reporting segments
Revenue		12,440		8,666
Gold [Member] | Kensington
Financial information relating to reporting segments
Revenue		54,466		51,666
Gold [Member] | Wharf [Member]
Financial information relating to reporting segments
Revenue		33,849		25,626
Gold [Member] | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0		0
Gold [Member] | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0		0
Product, Silver
Financial information relating to reporting segments
Revenue		63,795		44,909
Product, Silver | Palmarejo [Member]
Financial information relating to reporting segments
Revenue		42,778		32,692
Product, Silver | Rochester [Member]
Financial information relating to reporting segments
Revenue		20,317		10,739
Product, Silver | Kensington
Financial information relating to reporting segments
Revenue		0		0
Product, Silver | Wharf [Member]
Financial information relating to reporting segments
Revenue		700		248
Product, Silver | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0		1,230
Product, Silver | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0		0
Product, Zinc
Financial information relating to reporting segments
Revenue				(662)
Product, Zinc | Palmarejo [Member]
Financial information relating to reporting segments
Revenue				0
Product, Zinc | Rochester [Member]
Financial information relating to reporting segments
Revenue				0
Product, Zinc | Kensington
Financial information relating to reporting segments
Revenue				0
Product, Zinc | Wharf [Member]
Financial information relating to reporting segments
Revenue				0
Product, Zinc | Silvertip [Member]
Financial information relating to reporting segments
Revenue				(662)
Product, Zinc | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue				0
Product, Lead
Financial information relating to reporting segments
Revenue				1,315
Product, Lead | Palmarejo [Member]
Financial information relating to reporting segments
Revenue				0
Product, Lead | Rochester [Member]
Financial information relating to reporting segments
Revenue				0
Product, Lead | Kensington
Financial information relating to reporting segments
Revenue				0
Product, Lead | Wharf [Member]
Financial information relating to reporting segments
Revenue				0
Product, Lead | Silvertip [Member]
Financial information relating to reporting segments
Revenue				1,315
Product, Lead | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue				0
Product, Metal [Member]
Financial information relating to reporting segments
Revenue		202,117		173,167
Product, Metal [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Revenue		80,345		74,339
Product, Metal [Member] | Rochester [Member]
Financial information relating to reporting segments
Revenue		32,757		19,405
Product, Metal [Member] | Kensington
Financial information relating to reporting segments
Revenue		54,466		51,666
Product, Metal [Member] | Wharf [Member]
Financial information relating to reporting segments
Revenue		34,549		25,874
Product, Metal [Member] | Silvertip [Member]
Financial information relating to reporting segments
Revenue		0		1,883
Product, Metal [Member] | Other Mining Properties [Member]
Financial information relating to reporting segments
Revenue		0		0
Product
Financial information relating to reporting segments
Costs applicable to sales	[2]	108,147		118,917
Product | Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales	[2]	33,988		35,974
Product | Rochester [Member]
Financial information relating to reporting segments
Costs applicable to sales	[2]	24,033		16,956
Product | Kensington
Financial information relating to reporting segments
Costs applicable to sales	[2]	31,394		30,507
Product | Wharf [Member]
Financial information relating to reporting segments
Costs applicable to sales	[2]	18,732		17,823
Product | Silvertip [Member]
Financial information relating to reporting segments
Costs applicable to sales	[2]	0		17,657
Product | Other Mining Properties [Member]
Financial information relating to reporting segments
Costs applicable to sales	[2]	0		0
Mineral, Exploration
Financial information relating to reporting segments
Costs applicable to sales		9,666		6,386
Mineral, Exploration | Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales		1,693		1,492
Mineral, Exploration | Rochester [Member]
Financial information relating to reporting segments
Costs applicable to sales		472		220
Mineral, Exploration | Kensington
Financial information relating to reporting segments
Costs applicable to sales		1,109		1,772
Mineral, Exploration | Wharf [Member]
Financial information relating to reporting segments
Costs applicable to sales		67		4
Mineral, Exploration | Silvertip [Member]
Financial information relating to reporting segments
Costs applicable to sales		2,932		251
Mineral, Exploration | Other Mining Properties [Member]
Financial information relating to reporting segments
Costs applicable to sales		$ 3,393		$ 2,647

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

[2] Excludes amortization.