Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Revenue		$ 199,469			$ 148,795			$ 516,462	$ 482,049
Pre-development, reclamation, and other		4,851			8,121			13,619	15,966
Amortization		45,678			31,184			130,758	91,420
General and administrative		9,635			7,729			26,859	24,183
Loss on debt extinguishments		(1,282)			0			(1,282)	0
Fair value adjustments, net		4,377			715			8,201	2,907
Other, net		(3,634)			(20,903)			(2,931)	(19,846)
Interest expense, net of capitalized interest		(5,980)			(5,818)			(19,259)	(17,801)
Total other income (expense), net		(6,519)			(26,006)			(15,271)	(34,740)
Total		(14,059)			(49,259)			(89,921)	(29,972)
Income and mining tax (expense) benefit		(218)			(3,785)			13,986	(19,451)
Income (loss) from continuing operations		(14,277)			(53,044)			(75,935)	(49,423)
Equity income (loss) in consolidated subsidiaries		0			0			0	0
Income (loss) from discontinued operations		0			0			5,693	550
NET INCOME (LOSS)		(14,277)	$ (36,764)	$ (19,201)	(53,044)	$ 2,930	$ 1,241	(70,242)	(48,873)
Unrealized gain (loss) on debt securities, net of tax		0			192			59	(173)
Reclassification adjustments for impairment of equity securities, net of tax		1,132						1,132
Other comprehensive income (loss)		1,132		$ 59	192	$ (87)	$ (278)	1,191	(173)
COMPREHENSIVE INCOME (LOSS)		(13,145)			(52,852)			(69,051)	(49,046)
Operating Expenses		207,009			172,048			591,112	477,281
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
Loss on debt extinguishments								0
Fair value adjustments, net		0			0			0	0
Other, net		(4,360)			(3,921)			(12,973)	(11,536)
Interest expense, net of capitalized interest		4,360			3,921			12,973	11,536
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		11,280			24,343			56,479	5,625
Income (loss) from discontinued operations								0	0
NET INCOME (LOSS)		11,280			24,343			56,479	5,625
Unrealized gain (loss) on debt securities, net of tax		0			0			0	0
Reclassification adjustments for impairment of equity securities, net of tax		0						0
COMPREHENSIVE INCOME (LOSS)		11,280			24,343			56,479	5,625
Operating Expenses		0			0			0	0
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Revenue		0			0			0	0
Pre-development, reclamation, and other		15			1,302			255	1,912
Amortization		216			232			656	714
General and administrative		8,973			7,682			24,429	24,113
Loss on debt extinguishments								(1,282)
Fair value adjustments, net		4,378			745			8,210	3,335
Other, net		4,557			(14,194)			14,648	(4,890)
Interest expense, net of capitalized interest		(4,729)			(5,445)			(16,273)	(15,786)
Total other income (expense), net		2,924			(18,894)			5,303	(17,341)
Total		(6,710)			(28,493)			(21,153)	(45,248)
Income and mining tax (expense) benefit		3,808			(430)			1,420	286
Income (loss) from continuing operations		(2,902)			(28,923)			(19,733)	(44,962)
Equity income (loss) in consolidated subsidiaries		(11,371)			(24,122)			(56,200)	(4,922)
Income (loss) from discontinued operations								5,693	1,010
NET INCOME (LOSS)		(14,273)			(53,045)			(70,240)	(48,874)
Unrealized gain (loss) on debt securities, net of tax		0			192			59	(173)
Reclassification adjustments for impairment of equity securities, net of tax		1,132						1,132
COMPREHENSIVE INCOME (LOSS)		(13,141)			(52,853)			(69,049)	(49,047)
Operating Expenses		9,634			9,599			26,456	27,907
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		116,808			89,289			298,361	281,762
Pre-development, reclamation, and other		4,465			5,456			8,397	9,391
Amortization		21,751			15,084			58,922	43,876
General and administrative		208			3			778	15
Loss on debt extinguishments								0
Fair value adjustments, net		(1)			(30)			(9)	(428)
Other, net		(814)			(189)			(376)	187
Interest expense, net of capitalized interest		(838)			(372)			(1,738)	(1,092)
Total other income (expense), net		(1,653)			(591)			(2,123)	(1,333)
Total		4,354			(7,858)			(758)	(90)
Income and mining tax (expense) benefit		(3,740)			(489)			(4,888)	(2,997)
Income (loss) from continuing operations		614			(8,347)			(5,646)	(3,087)
Equity income (loss) in consolidated subsidiaries		(4)			(47)			(634)	(113)
Income (loss) from discontinued operations								0	(284)
NET INCOME (LOSS)		610			(8,394)			(6,280)	(3,484)
Unrealized gain (loss) on debt securities, net of tax		0			0			0	0
Reclassification adjustments for impairment of equity securities, net of tax		0						0
COMPREHENSIVE INCOME (LOSS)		610			(8,394)			(6,280)	(3,484)
Operating Expenses		110,801			96,556			296,996	280,519
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		82,661			59,506			218,101	200,287
Pre-development, reclamation, and other		371			1,363			4,967	4,663
Amortization		23,711			15,868			71,180	46,830
General and administrative		454			44			1,652	55
Loss on debt extinguishments								0
Fair value adjustments, net		0			0			0
Other, net		(3,017)			(2,599)			(4,230)	(3,607)
Interest expense, net of capitalized interest		(4,773)			(3,922)			(14,221)	(12,459)
Total other income (expense), net		(7,790)			(6,521)			(18,451)	(16,066)
Total		(11,703)			(12,908)			(68,010)	15,366
Income and mining tax (expense) benefit		(286)			(2,866)			17,454	(16,740)
Income (loss) from continuing operations		(11,989)			(15,774)			(50,556)	(1,374)
Equity income (loss) in consolidated subsidiaries		95			(174)			355	(590)
Income (loss) from discontinued operations								0	(176)
NET INCOME (LOSS)		(11,894)			(15,948)			(50,201)	(2,140)
Unrealized gain (loss) on debt securities, net of tax		0			0			0	0
Reclassification adjustments for impairment of equity securities, net of tax		0						0
COMPREHENSIVE INCOME (LOSS)		(11,894)			(15,948)			(50,201)	(2,140)
Operating Expenses		86,574			65,893			267,660	168,855
Product [Member]
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales	[1]	140,952			116,857			404,550	324,443
Product [Member] | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0			0			0	0	[1]
Product [Member] | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0			0			0	0
Product [Member] | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		79,367			73,768			220,680	219,948
Product [Member] | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		61,585			43,089			183,870	104,495
Mineral, Exploration [Member]
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		5,893			8,157			15,326	21,269
Loss on debt extinguishments		(1,282)
Mineral, Exploration [Member] | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0			0			0	0
Loss on debt extinguishments		0
Mineral, Exploration [Member] | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		430			383			1,116	1,168
Loss on debt extinguishments		(1,282)
Mineral, Exploration [Member] | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		5,010			2,245			8,219	7,289
Loss on debt extinguishments		0
Mineral, Exploration [Member] | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		453			$ 5,529			$ 5,991	$ 12,812
Loss on debt extinguishments		$ 0

[1] Excludes amortization.