Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Revenue		$ 173,167	$ 154,870
Pre-development, reclamation, and other		6,555	4,434
Amortization		36,162	41,876
General and administrative		8,920	9,474
Fair value adjustments, net		(8,819)	9,120
Other, net		1,881	60
Interest expense, net of capitalized interest		(5,128)	(6,454)
Total other income (expense), net		(12,066)	2,726
Total		(15,839)	(33,552)
Income and mining tax (expense) benefit		3,939	8,658
Income (loss) from continuing operations		(11,900)	(24,894)
Equity income (loss) in consolidated subsidiaries		0	0
Income (loss) from discontinued operations		0	5,693
NET INCOME (LOSS)		(11,900)	(19,201)
Unrealized gain (loss) on debt securities, net of tax		0	59
Reclassification adjustments for impairment of equity securities, net of tax		206	0
Other comprehensive income (loss)		206	59
COMPREHENSIVE INCOME (LOSS)		(11,694)	(19,142)
Operating Expenses		176,940	191,148
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue		0	0
Pre-development, reclamation, and other		0	0
Amortization		0	0
General and administrative		0	0
Fair value adjustments, net		0	0
Other, net		(3,727)	(4,303)
Interest expense, net of capitalized interest		3,727	4,303
Total other income (expense), net		0	0
Total		0	0
Income and mining tax (expense) benefit		0	0
Income (loss) from continuing operations		0	0
Equity income (loss) in consolidated subsidiaries		(5,920)	21,150
Income (loss) from discontinued operations		0	0
NET INCOME (LOSS)		(5,920)	21,150
Unrealized gain (loss) on debt securities, net of tax		0	0
Reclassification adjustments for impairment of equity securities, net of tax		0
COMPREHENSIVE INCOME (LOSS)		(5,920)	21,150
Operating Expenses		0	0
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Revenue		0	0
Pre-development, reclamation, and other		18	160
Amortization		215	221
General and administrative		8,910	9,474
Fair value adjustments, net		(8,819)	9,120
Other, net		4,615	4,998
Interest expense, net of capitalized interest		(4,105)	(5,729)
Total other income (expense), net		(8,309)	8,389
Total		(17,732)	(1,802)
Income and mining tax (expense) benefit		(218)	(2,077)
Income (loss) from continuing operations		(17,950)	(3,879)
Equity income (loss) in consolidated subsidiaries		6,050	(21,015)
Income (loss) from discontinued operations		0	5,693
NET INCOME (LOSS)		(11,900)	(19,201)
Unrealized gain (loss) on debt securities, net of tax		0	59
Reclassification adjustments for impairment of equity securities, net of tax		206
COMPREHENSIVE INCOME (LOSS)		(11,694)	(19,142)
Operating Expenses		9,423	10,191
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		96,944	90,699
Pre-development, reclamation, and other		2,616	1,943
Amortization		17,415	18,445
General and administrative		2	0
Fair value adjustments, net		0	0
Other, net		(9)	165
Interest expense, net of capitalized interest		(736)	(392)
Total other income (expense), net		(745)	(227)
Total		6,517	(3,062)
Income and mining tax (expense) benefit		(518)	(32)
Income (loss) from continuing operations		5,999	(3,094)
Equity income (loss) in consolidated subsidiaries		(3,157)	(418)
Income (loss) from discontinued operations		0	0
NET INCOME (LOSS)		2,842	(3,512)
Unrealized gain (loss) on debt securities, net of tax		0	0
Reclassification adjustments for impairment of equity securities, net of tax		0
COMPREHENSIVE INCOME (LOSS)		2,842	(3,512)
Operating Expenses		89,682	93,534
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue		76,223	64,171
Pre-development, reclamation, and other		3,921	2,331
Amortization		18,532	23,210
General and administrative		8	0
Fair value adjustments, net		0	0
Other, net		1,002	(800)
Interest expense, net of capitalized interest		(4,014)	(4,636)
Total other income (expense), net		(3,012)	(5,436)
Total		(4,624)	(28,688)
Income and mining tax (expense) benefit		4,675	10,767
Income (loss) from continuing operations		51	(17,921)
Equity income (loss) in consolidated subsidiaries		3,027	283
Income (loss) from discontinued operations		0	0
NET INCOME (LOSS)		3,078	(17,638)
Unrealized gain (loss) on debt securities, net of tax		0	0
Reclassification adjustments for impairment of equity securities, net of tax		0
COMPREHENSIVE INCOME (LOSS)		3,078	(17,638)
Operating Expenses		77,835	87,423
Product
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales	[1]	118,917	131,650
Product | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0	0
Product | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0	0
Product | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		65,286	72,022
Product | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		53,631	59,628
Mineral, Exploration
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		6,386	3,714
Mineral, Exploration | Eliminations
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		0	0
Mineral, Exploration | Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		280	336
Mineral, Exploration | Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		4,363	1,124
Mineral, Exploration | Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Costs applicable to sales		$ 1,743	$ 2,254

[1] Excludes amortization.