Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014	Oct. 02, 2014
Condensed Financial Statements, Captions [Line Items]
Revenue	$ 152,956,000		$ 159,633,000
Costs applicable to sales	115,062,000	[1]	106,896,000	[1]
Amortization	33,090,000		40,459,000
General and Administrative Expense	8,834,000		13,896,000
Exploration Expense, Mining	4,266,000		4,217,000
Pre-development, reclamation, and other	6,763,000		6,984,000
Total costs and expenses	168,015,000		172,452,000
Loss on termination of revolving credit facility	0		(3,035,000)
Gain (loss) on derivative instruments	(4,884,000)		(11,436,000)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	(1,514,000)
Impairment of equity securities	1,514,000		2,588,000
Interest and other income, net	(997,000)		(1,983,000)
Interest expense, net	(10,765,000)		(13,054,000)
Nonoperating Income (Expense)	(18,160,000)		(29,061,000)
Income before income and mining taxes	(33,219,000)		(41,880,000)
Income and mining tax benefit (expense)	(68,000)		4,689,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(33,287,000)		(37,191,000)
Income (Loss) from Equity Method Investments	0		0
NET INCOME (LOSS)	(33,287,000)		(37,191,000)
Unrealized gain (loss) on available for sale securities	(915,000)		371,000
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	928,000		1,587,000
Other comprehensive income (loss)	13,000		1,958,000
COMPREHENSIVE INCOME (LOSS)	(33,274,000)		(35,233,000)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Revenue	0		0
Costs applicable to sales	0		0
Amortization	502,000		377,000
General and Administrative Expense	8,750,000		13,052,000
Exploration Expense, Mining	563,000		586,000
Pre-development, reclamation, and other	3,388,000		0
Total costs and expenses	13,203,000		14,015,000
Gain (loss) on derivative instruments	(1,046,000)		(526,000)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	0		0
Interest and other income, net	1,280,000		840,000
Interest expense, net	(8,855,000)		(10,183,000)
Nonoperating Income (Expense)	(8,621,000)		(9,869,000)
Income before income and mining taxes	(21,824,000)		(23,884,000)
Income and mining tax benefit (expense)	1,550,000		(146,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(20,274,000)		(24,030,000)
Income (Loss) from Equity Method Investments	(13,013,000)		(13,161,000)
NET INCOME (LOSS)	(33,287,000)		(37,191,000)
Marketable Securities, Unrealized Gain (Loss)			371,000
Unrealized gain (loss) on available for sale securities	(915,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			1,587,000
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	928,000
Other comprehensive income (loss)	13,000		1,958,000
COMPREHENSIVE INCOME (LOSS)	(33,274,000)		(35,233,000)
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	88,672,000		60,500,000
Costs applicable to sales	60,811,000		43,238,000
Amortization	18,567,000		15,296,000
General and Administrative Expense	7,000		166,000
Exploration Expense, Mining	2,458,000		2,421,000
Pre-development, reclamation, and other	1,375,000		1,536,000
Total costs and expenses	83,218,000		62,657,000
Gain (loss) on derivative instruments	(2,293,000)		(673,000)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	(1,514,000)		(2,588,000)
Interest and other income, net	(57,000)		46,000
Interest expense, net	(288,000)		(26,000)
Nonoperating Income (Expense)	(4,152,000)		(3,241,000)
Income before income and mining taxes	1,302,000		(5,398,000)
Income and mining tax benefit (expense)	(350,000)		0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	952,000		(5,398,000)
Income (Loss) from Equity Method Investments	809,000		178,000
NET INCOME (LOSS)	1,761,000		(5,220,000)
Marketable Securities, Unrealized Gain (Loss)			467,000
Unrealized gain (loss) on available for sale securities	(915,000)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			1,587,000
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	928,000
Other comprehensive income (loss)	13,000		2,054,000
COMPREHENSIVE INCOME (LOSS)	1,774,000		(3,166,000)
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Revenue	64,284,000		99,133,000
Costs applicable to sales	54,251,000		63,658,000
Amortization	14,021,000		24,786,000
General and Administrative Expense	77,000		678,000
Exploration Expense, Mining	1,245,000		1,210,000
Pre-development, reclamation, and other	2,000,000		5,448,000
Total costs and expenses	71,594,000		95,780,000
Gain (loss) on derivative instruments	(1,545,000)		(10,237,000)
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	0		0
Interest and other income, net	(1,398,000)		(2,211,000)
Interest expense, net	(2,444,000)		(3,503,000)
Nonoperating Income (Expense)	(5,387,000)		(15,951,000)
Income before income and mining taxes	(12,697,000)		(12,598,000)
Income and mining tax benefit (expense)	(1,268,000)		4,835,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(13,965,000)		(7,763,000)
Income (Loss) from Equity Method Investments	0		0
NET INCOME (LOSS)	(13,965,000)		(7,763,000)
Marketable Securities, Unrealized Gain (Loss)			0
Unrealized gain (loss) on available for sale securities	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			0
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	0
Other comprehensive income (loss)	0		0
COMPREHENSIVE INCOME (LOSS)	(13,965,000)		(7,763,000)
Eliminations
Condensed Financial Statements, Captions [Line Items]
Revenue	0		0
Costs applicable to sales	0		0
Amortization	0		0
General and Administrative Expense	0		0
Exploration Expense, Mining	0		0
Pre-development, reclamation, and other	0		0
Total costs and expenses	0		0
Gain (loss) on derivative instruments	0		0
Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments	0		0
Interest and other income, net	(822,000)		(658,000)
Interest expense, net	822,000		658,000
Nonoperating Income (Expense)	0		0
Income 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	12,204,000		12,983,000
NET INCOME (LOSS)	12,204,000		12,983,000
Marketable Securities, Unrealized Gain (Loss)			(467,000)
Unrealized gain (loss) on available for sale securities	915,000
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			(1,587,000)
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax	(928,000)
Other comprehensive income (loss)	(13,000)		(2,054,000)
COMPREHENSIVE INCOME (LOSS)	12,191,000		10,929,000
Senior Notes due Two Thousand Twenty One [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.875%				7.875%
Operating Segments [Member]
Condensed Financial Statements, Captions [Line Items]
Revenue	152,956,000
Costs applicable to sales	115,062,000
Amortization	33,090,000
Interest and other income, net	(2,511,000)		(4,571,000)
NET INCOME (LOSS)			(37,191,000)
Palmarejo gold stream agreement [Member]
Condensed Financial Statements, Captions [Line Items]
Aggregate deposit to be received	$ 5,000,000					$ 22,000,000

[1] Excludes amortization.