Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Condensed Financial Statements, Captions [Line Items]
Revenue		$ 154,249		$ 162,123		$ 327,416	$ 316,993
Pre-development, reclamation, and other		18,675		4,334		25,230	8,768
Amortization		27,876		43,204		64,038	85,080
General and administrative		8,616		7,750		17,536	17,224
Operating Expenses		157,037		192,955		333,977	384,103
Operating Income (Loss)						(6,561)
Loss on debt extinguishments		0
Fair value adjustments, net		10,067		(5,296)		1,248	3,824
Other, net		121		643		2,002	703
Interest expense, net of capitalized interest		(5,765)		(6,825)		(10,893)	(13,279)
Total other income (expense), net		4,423		(11,478)		(7,643)	(8,752)
Total		1,635		(42,310)		(14,204)	(75,862)
Income and mining tax (expense) benefit		(2,844)		5,546		1,095	14,204
Income (loss) from continuing operations		(1,209)		(36,764)		(13,109)	(61,658)
Equity income (loss) in consolidated subsidiaries		0		0		0	0
Income (loss) from discontinued operations		0		0		0	5,693
NET INCOME (LOSS)		(1,209)	$ (11,900)	(36,764)	$ (19,201)	(13,109)	(55,965)
Unrealized gain (loss) on debt securities, net of tax		0		0		0	59
Reclassification adjustments for impairment of equity securities, net of tax		(7,776)		0		(7,570)	0
Other comprehensive income (loss)		(7,776)	$ 206	0	$ 59	(7,570)	59
COMPREHENSIVE INCOME (LOSS)		(8,985)		(36,764)		(20,679)	(55,906)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue		0		0		0	0
Pre-development, reclamation, and other		0		0		0	0
Amortization		0		0		0	0
General and administrative		0		0		0	0
Operating Expenses		0		0		0	0
Operating Income (Loss)						0
Loss on debt extinguishments		0
Fair value adjustments, net		0		0		0	0
Other, net		(3,628)		(4,310)		(7,355)	(8,613)
Interest expense, net of capitalized interest		3,628		4,310		7,355	8,613
Total other income (expense), net		0		0		0	0
Total		0		0		0	0
Income and mining tax (expense) benefit		0		0		0	0
Income (loss) from continuing operations		0		0		0	0
Equity income (loss) in consolidated subsidiaries		4,522		24,049		(1,398)	45,199
Income (loss) from discontinued operations		0		0		0	0
NET INCOME (LOSS)		4,522		24,049		(1,398)	45,199
Unrealized gain (loss) on debt securities, net of tax							0
Reclassification adjustments for impairment of equity securities, net of tax		0				0
Other comprehensive income (loss)		0		0		0	0
COMPREHENSIVE INCOME (LOSS)		4,522		24,049		(1,398)	45,199
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Revenue		0		0		0	0
Pre-development, reclamation, and other		104		80		122	240
Amortization		187		219		402	440
General and administrative		8,612		5,982		17,522	15,456
Operating Expenses		9,333		6,631		18,756	16,822
Operating Income (Loss)						(18,756)
Loss on debt extinguishments		0
Fair value adjustments, net		10,067		(5,288)		1,248	3,832
Other, net		3,923		5,093		8,538	10,091
Interest expense, net of capitalized interest		(4,670)		(5,815)		(8,775)	(11,544)
Total other income (expense), net		9,320		(6,010)		1,011	2,379
Total		(13)		(12,641)		(17,745)	(14,443)
Income and mining tax (expense) benefit		3,256		(311)		3,038	(2,388)
Income (loss) from continuing operations		3,243		(12,952)		(14,707)	(16,831)
Equity income (loss) in consolidated subsidiaries		(4,452)		(23,814)		1,598	(44,829)
Income (loss) from discontinued operations		0		0		0	5,693
NET INCOME (LOSS)		(1,209)		(36,766)		(13,109)	(55,967)
Unrealized gain (loss) on debt securities, net of tax							59
Reclassification adjustments for impairment of equity securities, net of tax		(7,776)				(7,570)
Other comprehensive income (loss)		(7,776)		0		(7,570)	59
COMPREHENSIVE INCOME (LOSS)		(8,985)		(36,766)		(20,679)	(55,908)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		116,280		90,854		213,224	181,553
Pre-development, reclamation, and other		5,358		1,989		7,974	3,932
Amortization		19,188		18,726		36,603	37,171
General and administrative		0		570		2	570
Operating Expenses		103,353		92,661		193,035	186,195
Operating Income (Loss)						20,189
Loss on debt extinguishments		0
Fair value adjustments, net		0		(8)		0	(8)
Other, net		(89)		273		(98)	438
Interest expense, net of capitalized interest		(733)		(508)		(1,469)	(900)
Total other income (expense), net		(822)		(243)		(1,567)	(470)
Total		12,105		(2,050)		18,622	(5,112)
Income and mining tax (expense) benefit		(2,175)		(1,116)		(2,693)	(1,148)
Income (loss) from continuing operations		9,930		(3,166)		15,929	(6,260)
Equity income (loss) in consolidated subsidiaries		(4,018)		(212)		(7,175)	(630)
Income (loss) from discontinued operations		0		0		0	0
NET INCOME (LOSS)		5,912		(3,378)		8,754	(6,890)
Unrealized gain (loss) on debt securities, net of tax							0
Reclassification adjustments for impairment of equity securities, net of tax		0				0
Other comprehensive income (loss)		0		0		0	0
COMPREHENSIVE INCOME (LOSS)		5,912		(3,378)		8,754	(6,890)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		37,969		71,269		114,192	135,440
Pre-development, reclamation, and other		13,213		2,265		17,134	4,596
Amortization		8,501		24,259		27,033	47,469
General and administrative		4		1,198		12	1,198
Operating Expenses		44,351		93,663		122,186	181,086
Operating Income (Loss)						(7,994)
Loss on debt extinguishments		0
Fair value adjustments, net		0		0		0	0
Other, net		(85)		(413)		917	(1,213)
Interest expense, net of capitalized interest		(3,990)		(4,812)		(8,004)	(9,448)
Total other income (expense), net		(4,075)		(5,225)		(7,087)	(10,661)
Total		(10,457)		(27,619)		(15,081)	(56,307)
Income and mining tax (expense) benefit		(3,925)		6,973		750	17,740
Income (loss) from continuing operations		(14,382)		(20,646)		(14,331)	(38,567)
Equity income (loss) in consolidated subsidiaries		3,948		(23)		6,975	260
Income (loss) from discontinued operations		0		0		0	0
NET INCOME (LOSS)		(10,434)		(20,669)		(7,356)	(38,307)
Unrealized gain (loss) on debt securities, net of tax							0
Reclassification adjustments for impairment of equity securities, net of tax		0				0
Other comprehensive income (loss)		0		0		0	0
COMPREHENSIVE INCOME (LOSS)		(10,434)		(20,669)		(7,356)	(38,307)
Product
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales	[1]	90,015		131,948		208,932	263,598
Product | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0		0		0	0
Product | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0		0		0	0
Product | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		71,190		69,291		136,476	141,313
Product | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		18,825		62,657		72,456	122,285
Mineral, Exploration
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		11,855		5,719		18,241	9,433
Mineral, Exploration | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0		0		0	0
Mineral, Exploration | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		430		350		710	686
Mineral, Exploration | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		7,617		2,085		11,980	3,209
Mineral, Exploration | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		$ 3,808		$ 3,284		$ 5,551	$ 5,538

[1] Excludes amortization.