Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Revenues		$ 206,138	$ 148,387
Costs applicable to sales	[1]	132,712	101,555
Amortization		40,104	27,964
General and Administrative Expense		10,133	8,276
Exploration Expense, Mining		5,252	1,731
Write-downs		0	4,446
Pre-development, reclamation, and other		4,581	4,204
Total costs and expenses		192,782	148,176
Gain (loss) on derivative instruments		(1,200)	(8,695)
Other, net		21,139	1,314
Interest expense, net		(3,586)	(11,120)
Total other income (expense), net		16,353	(18,501)
Income (loss) before income and mining taxes		29,709	(18,290)
Income and mining tax benefit (expense)		(11,046)	(2,106)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		18,663	(20,396)
Income (Loss) from Equity Method Investments		0	0
NET INCOME (LOSS)		18,663	(20,396)
Unrealized gain (loss) on available for sale securities		(2,182)	1,043
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax		121	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		1,471	588
Other comprehensive income (loss)		(590)	1,631
COMPREHENSIVE INCOME (LOSS)		18,073	(18,765)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Revenues		0	0
Costs applicable to sales		0	0
Amortization		324	423
General and Administrative Expense		10,106	8,080
Exploration Expense, Mining		336	623
Write-downs			0
Pre-development, reclamation, and other		175	452
Total costs and expenses		10,941	9,578
Gain (loss) on derivative instruments		0	(1,582)
Other, net		15,222	338
Interest expense, net		(3,279)	(10,255)
Total other income (expense), net		11,943	(11,499)
Income (loss) before income and mining taxes		1,002	(21,077)
Income and mining tax benefit (expense)		1,588	(209)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		2,590	(21,286)
Income (Loss) from Equity Method Investments		16,073	890
NET INCOME (LOSS)		18,663	(20,396)
Unrealized gain (loss) on available for sale securities		(2,182)	1,043
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax		121
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		1,471	588
Other comprehensive income (loss)		(590)	1,631
COMPREHENSIVE INCOME (LOSS)		18,073	(18,765)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenues		107,194	93,954
Costs applicable to sales		71,202	62,364
Amortization		18,104	17,859
General and Administrative Expense		24	18
Exploration Expense, Mining		1,727	184
Write-downs			0
Pre-development, reclamation, and other		1,781	1,416
Total costs and expenses		92,838	81,841
Gain (loss) on derivative instruments		(1,200)	(2,249)
Other, net		5,458	2,254
Interest expense, net		(175)	(213)
Total other income (expense), net		4,083	(208)
Income (loss) before income and mining taxes		18,439	11,905
Income and mining tax benefit (expense)		(2,434)	(307)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		16,005	11,598
Income (Loss) from Equity Method Investments		70	(4,479)
NET INCOME (LOSS)		16,075	7,119
Unrealized gain (loss) on available for sale securities		(279)	976
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax		121
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		(369)	(381)
Other comprehensive income (loss)		(527)	595
COMPREHENSIVE INCOME (LOSS)		15,548	7,714
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenues		98,944	54,433
Costs applicable to sales		61,510	39,191
Amortization		21,676	9,682
General and Administrative Expense		3	178
Exploration Expense, Mining		3,189	924
Write-downs			4,446
Pre-development, reclamation, and other		2,625	2,336
Total costs and expenses		89,003	56,757
Gain (loss) on derivative instruments		0	(4,864)
Other, net		1,873	(253)
Interest expense, net		(1,546)	(1,677)
Total other income (expense), net		327	(6,794)
Income (loss) before income and mining taxes		10,268	(9,118)
Income and mining tax benefit (expense)		(10,200)	(1,590)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		68	(10,708)
Income (Loss) from Equity Method Investments		(67)	0
NET INCOME (LOSS)		1	(10,708)
Unrealized gain (loss) on available for sale securities		0	0
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		0	0
Other comprehensive income (loss)		0	0
COMPREHENSIVE INCOME (LOSS)		1	(10,708)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenues		0	0
Costs applicable to sales		0	0
Amortization		0	0
General and Administrative Expense		0	0
Exploration Expense, Mining		0	0
Write-downs			0
Pre-development, reclamation, and other		0	0
Total costs and expenses		0	0
Gain (loss) on derivative instruments		0	0
Other, net		(1,414)	(1,025)
Interest expense, net		1,414	1,025
Total other income (expense), net		0	0
Income (loss) before income and mining taxes		0	0
Income and mining tax benefit (expense)		0	0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		0	0
Income (Loss) from Equity Method Investments		(16,076)	3,589
NET INCOME (LOSS)		(16,076)	3,589
Unrealized gain (loss) on available for sale securities		279	(976)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax		(121)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax		369	381
Other comprehensive income (loss)		527	(595)
COMPREHENSIVE INCOME (LOSS)		$ (15,549)	$ 2,994

[1] Excludes amortization.