Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Revenue		$ 162,123		$ 169,987		$ 316,993	$ 333,254
Pre-development, reclamation, and other		4,334		3,620		8,768	7,845
Amortization		43,204		29,459		85,080	60,236
General and administrative		7,750		7,650		17,224	16,454
Fair value adjustments, net		(5,296)		(2,462)		3,824	2,192
Other, net		643		544		703	1,057
Interest expense, net of capitalized interest		(6,825)		(6,018)		(13,279)	(11,983)
Total other income (expense), net		(11,478)		(7,936)		(8,752)	(8,734)
Total		(42,310)		6,647		(75,862)	19,287
Income and mining tax (expense) benefit		5,546		(3,717)		14,204	(15,666)
Income (loss) from continuing operations		(36,764)		2,930		(61,658)	3,621
Equity income (loss) in consolidated subsidiaries		0		0		0	0
Income (loss) from discontinued operations		0		0		5,693	550
NET INCOME (LOSS)		(36,764)	$ (19,201)	2,930	$ 1,241	(55,965)	4,171
Unrealized gain (loss) on debt securities, net of tax		0		(87)		59	(365)
Other comprehensive income (loss)		0	$ 59	(87)	$ (278)	59	(365)
COMPREHENSIVE INCOME (LOSS)		(36,764)		2,843		(55,906)	3,806
Operating Expenses		192,955		155,404		384,103	305,233
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
Fair value adjustments, net		0		0		0	0
Other, net		(4,310)		(3,896)		(8,613)	(7,615)
Interest expense, net of capitalized interest		4,310		3,896		8,613	7,615
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		24,049		(14,762)		45,199	(18,718)
Income (loss) from discontinued operations						0	0
NET INCOME (LOSS)		24,049		(14,762)		45,199	(18,718)
Unrealized gain (loss) on debt securities, net of tax				0		0	0
Other comprehensive income (loss)		0
COMPREHENSIVE INCOME (LOSS)		24,049		(14,762)		45,199	(18,718)
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		80		204		240	610
Amortization		219		236		440	482
General and administrative		5,982		7,634		15,456	16,431
Fair value adjustments, net		(5,288)		(2,356)		3,832	2,590
Other, net		5,093		4,829		10,091	9,304
Interest expense, net of capitalized interest		(5,815)		(5,258)		(11,544)	(10,341)
Total other income (expense), net		(6,010)		(2,785)		2,379	1,553
Total		(12,641)		(11,185)		(14,443)	(16,755)
Income and mining tax (expense) benefit		(311)		(922)		(2,388)	716
Income (loss) from continuing operations		(12,952)		(12,107)		(16,831)	(16,039)
Equity income (loss) in consolidated subsidiaries		(23,814)		15,036		(44,829)	19,200
Income (loss) from discontinued operations						5,693	1,010
NET INCOME (LOSS)		(36,766)		2,929		(55,967)	4,171
Unrealized gain (loss) on debt securities, net of tax				(87)		59	(365)
Other comprehensive income (loss)		0
COMPREHENSIVE INCOME (LOSS)		(36,766)		2,842		(55,908)	3,806
Operating Expenses		6,631		8,400		16,822	18,308
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		90,854		99,243		181,553	192,473
Pre-development, reclamation, and other		1,989		1,988		3,932	3,935
Amortization		18,726		14,587		37,171	28,792
General and administrative		570		9		570	12
Fair value adjustments, net		(8)		(106)		(8)	(398)
Other, net		273		513		438	376
Interest expense, net of capitalized interest		(508)		(367)		(900)	(720)
Total other income (expense), net		(243)		40		(470)	(742)
Total		(2,050)		1,965		(5,112)	7,768
Income and mining tax (expense) benefit		(1,116)		(1,388)		(1,148)	(2,508)
Income (loss) from continuing operations		(3,166)		577		(6,260)	5,260
Equity income (loss) in consolidated subsidiaries		(212)		(28)		(630)	(66)
Income (loss) from discontinued operations						0	(284)
NET INCOME (LOSS)		(3,378)		549		(6,890)	4,910
Unrealized gain (loss) on debt securities, net of tax				0		0	0
Other comprehensive income (loss)		0
COMPREHENSIVE INCOME (LOSS)		(3,378)		549		(6,890)	4,910
Operating Expenses		92,661		97,318		186,195	183,963
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		71,269		70,744		135,440	140,781
Pre-development, reclamation, and other		2,265		1,428		4,596	3,300
Amortization		24,259		14,636		47,469	30,962
General and administrative		1,198		7		1,198	11
Fair value adjustments, net		0		0		0	0
Other, net		(413)		(902)		(1,213)	(1,008)
Interest expense, net of capitalized interest		(4,812)		(4,289)		(9,448)	(8,537)
Total other income (expense), net		(5,225)		(5,191)		(10,661)	(9,545)
Total		(27,619)		15,867		(56,307)	28,274
Income and mining tax (expense) benefit		6,973		(1,407)		17,740	(13,874)
Income (loss) from continuing operations		(20,646)		14,460		(38,567)	14,400
Equity income (loss) in consolidated subsidiaries		(23)		(246)		260	(416)
Income (loss) from discontinued operations						0	(176)
NET INCOME (LOSS)		(20,669)		14,214		(38,307)	13,808
Unrealized gain (loss) on debt securities, net of tax				0		0	0
Other comprehensive income (loss)		0
COMPREHENSIVE INCOME (LOSS)		(20,669)		14,214		(38,307)	13,808
Operating Expenses		93,663		49,686		181,086	102,962
Product [Member]
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales	[1]	131,948		108,246		263,598	207,586
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
Product [Member] | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		69,291		77,935		141,313	146,180
Product [Member] | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		62,657		30,311		122,285	61,406
Mineral, Exploration [Member]
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		5,719		6,429		9,433	13,112
Mineral, Exploration [Member] | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0		0		0	0
Mineral, Exploration [Member] | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		350		326		686	785
Mineral, Exploration [Member] | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		2,085		2,799		3,209	5,044
Mineral, Exploration [Member] | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		$ 3,284		$ 3,304		$ 5,538	$ 7,283

[1] Excludes amortization.