Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014		Dec. 31, 2014	Oct. 02, 2014
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 166,263	$ 164,562	$ 319,219		$ 324,195
Costs applicable to sales	119,097	118,687	234,160	[1]	225,583	[1]
Amortization	38,974	41,422	72,064		81,849
General and Administrative Expense	8,451	9,398	17,286		23,294
Exploration Expense, Mining	3,579	5,153	7,845		9,370
Pre-development, reclamation, and other	2,267	8,760	9,030		15,775
Total costs and expenses	172,368	183,420	340,385		355,871
Loss on termination of revolving credit facility	0	0	0		(3,035)
Gain (loss) on derivative instruments	2,754	(8,282)	(2,130)		(19,717)
Impairment of equity securities	(31)	(934)	(1,545)		(3,522)
Interest and other income, net	(2,821)	(116)	(3,817)		(2,100)
Interest expense, net	(10,734)	(12,310)	(21,499)		(25,365)
Nonoperating Income (Expense)	(10,832)	(21,642)	(28,991)		(50,704)
Income before income and mining taxes	(16,937)	(40,500)	(50,157)		(82,380)
Income and mining tax benefit (expense)	260	(2,621)	192		2,068
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(16,677)	(43,121)	(49,965)		(80,312)
Income (Loss) from Equity Method Investments	0	0	0		0
NET INCOME (LOSS)	(16,677)	(43,121)	(49,965)		(80,312)
Unrealized gain (loss) on available for sale securities	(1,312)	(773)	(2,813)		(401)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	904	17	904		17
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	31	572	1,545		2,159
Other comprehensive income (loss)	(377)	(184)	(364)		1,775
COMPREHENSIVE INCOME (LOSS)	(17,054)	(43,305)	(50,329)		(78,537)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Revenue	0	0	0		0
Costs applicable to sales	0	0	0		0
Amortization	496	448	998		825
General and Administrative Expense	8,377	9,716	17,127		22,768
Exploration Expense, Mining	591	950	1,154		1,536
Pre-development, reclamation, and other	(838)	352	2,550		352
Total costs and expenses	8,626	11,466	21,829		25,481
Gain (loss) on derivative instruments	1,188	(1,456)	142		(1,982)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	0	0	0		0
Interest and other income, net	611	1,075	1,891		1,915
Interest expense, net	(9,336)	(9,215)	(18,191)		(19,398)
Nonoperating Income (Expense)	(7,537)	(9,596)	(16,158)		(19,465)
Income before income and mining taxes	(16,163)	(21,062)	(37,987)		(44,946)
Income and mining tax benefit (expense)	1,945	273	3,495		127
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(14,218)	(20,789)	(34,492)		(44,819)
Income (Loss) from Equity Method Investments	(2,460)	(22,332)	(15,473)		(35,493)
NET INCOME (LOSS)	(16,678)	(43,121)	(49,965)		(80,312)
Unrealized gain (loss) on available for sale securities	(1,312)	(773)	(2,813)		(401)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	904	17	904		17
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	31	572	1,545		2,159
Other comprehensive income (loss)	(377)	(184)	(364)		1,775
COMPREHENSIVE INCOME (LOSS)	(17,055)	(43,305)	(50,329)		(78,537)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	99,635	60,748	188,307		121,248
Costs applicable to sales	68,477	47,599	129,288		90,837
Amortization	21,772	16,784	40,339		32,080
General and Administrative Expense	7	(163)	14		3
Exploration Expense, Mining	1,008	2,483	3,466		4,904
Pre-development, reclamation, and other	1,338	1,307	2,878		2,843
Total costs and expenses	92,602	68,010	175,985		130,667
Gain (loss) on derivative instruments	1,138	(1,837)	(1,155)		(2,510)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	(31)	(934)	(1,545)		(3,522)
Interest and other income, net	(873)	12	(912)		58
Interest expense, net	(263)	(314)	(551)		(340)
Nonoperating Income (Expense)	(29)	(3,073)	(4,163)		(6,314)
Income before income and mining taxes	7,004	(10,335)	8,159		(15,733)
Income and mining tax benefit (expense)	(1,618)	(419)	(1,282)		(419)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	5,386	(10,754)	6,877		(16,152)
Income (Loss) from Equity Method Investments	(649)	121	160		299
NET INCOME (LOSS)	4,737	(10,633)	7,037		(15,853)
Unrealized gain (loss) on available for sale securities	(486)	(847)	(1,982)		(380)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	904	17	904		17
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	31	572	1,545		2,159
Other comprehensive income (loss)	449	(258)	467		1,796
COMPREHENSIVE INCOME (LOSS)	5,186	(10,891)	7,504		(14,057)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	66,628	103,814	130,912		202,947
Costs applicable to sales	50,620	71,088	104,872		134,746
Amortization	16,706	24,190	30,727		48,944
General and Administrative Expense	67	(155)	145		523
Exploration Expense, Mining	1,980	1,720	3,225		2,930
Pre-development, reclamation, and other	1,767	7,101	3,602		12,580
Total costs and expenses	71,140	103,944	142,571		199,723
Gain (loss) on derivative instruments	428	(4,989)	(1,117)		(15,225)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	0	0	0		0
Interest and other income, net	(1,614)	(507)	(3,030)		(2,720)
Interest expense, net	(2,080)	(3,477)	(4,523)		(6,980)
Nonoperating Income (Expense)	(3,266)	(8,973)	(8,670)		(24,925)
Income before income and mining taxes	(7,778)	(9,103)	(20,329)		(21,701)
Income and mining tax benefit (expense)	(67)	(2,475)	(2,021)		2,360
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(7,845)	(11,578)	(22,350)		(19,341)
Income (Loss) from Equity Method Investments	0	0	0		0
NET INCOME (LOSS)	(7,845)	(11,578)	(22,350)		(19,341)
Unrealized gain (loss) on available for sale securities	0	0	0		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	0	0	0
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	0	0	0		0
Other comprehensive income (loss)	0	0	0		0
COMPREHENSIVE INCOME (LOSS)	(7,845)	(11,578)	(22,350)		(19,341)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue	0	0	0		0
Costs applicable to sales	0	0	0		0
Amortization	0	0	0		0
General and Administrative Expense	0	0	0		0
Exploration Expense, Mining	0	0	0		0
Pre-development, reclamation, and other	0	0	0		0
Total costs and expenses	0	0	0		0
Gain (loss) on derivative instruments	0	0	0		0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	0	0	0		0
Interest and other income, net	(945)	(696)	(1,766)		(1,353)
Interest expense, net	945	696	1,766		1,353
Nonoperating Income (Expense)	0	0	0		0
Income before income and mining taxes	0	0	0		0
Income and mining tax benefit (expense)	0	0	0		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	0	0	0		0
Income (Loss) from Equity Method Investments	3,109	22,211	15,313		35,194
NET INCOME (LOSS)	3,109	22,211	15,313		35,194
Unrealized gain (loss) on available for sale securities	486	847	1,982		380
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	(904)	(17)	(904)		(17)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	(31)	(572)	(1,545)		(2,159)
Other comprehensive income (loss)	(449)	258	(467)		(1,796)
COMPREHENSIVE INCOME (LOSS)	$ 2,660	22,469	$ 14,846		33,398
Senior Notes due Two Thousand Twenty One [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.875%		7.875%				7.875%
Operating Segments [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 166,263	164,562	$ 319,219
Costs applicable to sales	119,097	118,687	234,160
Amortization	38,974	41,422	72,064
Interest and other income, net	(2,852)	(1,050)	$ (5,362)		(5,622)
NET INCOME (LOSS)	$ (16,677)	$ (43,121)			$ (80,312)
Palmarejo gold stream agreement [Member]
Condensed Financial Statements, Captions [Line Items]
Aggregate deposit to be received								$ 22,000

[1] Excludes amortization.