Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Financial information relating to reporting segments
Revenue	$ 152,956		$ 159,633
Costs applicable to sales	115,062	[1]	106,896	[1]
Amortization	33,090		40,459
Exploration	4,266		4,217
Interest and other income, net	(997)		(1,983)
Interest expense, net	(10,765)		(13,054)
Loss on termination of revolving credit facility	0		(3,035)
Fair value adjustments, net	(4,884)		(11,436)
Income and mining tax benefit (expense)	(68)		4,689
Net income (loss)	(33,287)		(37,191)
Assets, Net	1,200,153				1,084,257
Capital expenditures	17,620		11,936
Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales	34,491		43,574
Amortization	7,333		18,659
Exploration	1,123		1,005
Other operating expenses	314		297
Interest and other income, net	(1,103)		(1,569)
Interest expense, net	(1,340)		(2,824)
Fair value adjustments, net	(1,545)		(10,237)
Income and mining tax benefit (expense)	(1,371)		3,828
Net income (loss)	(9,226)		(6,349)
Assets, Net	346,250		1,152,913
Capital expenditures	9,184		3,742
San Bartolome [Member]
Financial information relating to reporting segments
Metal sales	21,548		27,554
Royalties	0		0
Revenue	21,548		27,554
Costs applicable to sales	19,127		18,901
Amortization	4,691		4,457
Exploration	36		26
Other operating expenses	244		140
Interest and other income, net	452		682
Interest expense, net	(281)		(20)
Fair value adjustments, net	0		0
Income and mining tax benefit (expense)	(1,407)		(2,764)
Net income (loss)	(3,786)		1,928
Assets, Net	179,638		285,072
Capital expenditures	949		1,441
Kensington [Member]
Financial information relating to reporting segments
Metal sales	44,038		36,061
Royalties	0		0
Revenue	44,038		36,061
Costs applicable to sales	29,419		28,531
Amortization	11,554		10,709
Exploration	1,662		1,044
Other operating expenses	235		191
Interest and other income, net	(4)		0
Interest expense, net	(63)		(22)
Fair value adjustments, net	0		0
Income and mining tax benefit (expense)	0		0
Net income (loss)	1,101		(4,436)
Assets, Net	205,208		332,563
Capital expenditures	4,144		4,711
Rochester [Member]
Financial information relating to reporting segments
Metal sales	44,031		24,154
Royalties	0		0
Revenue	44,031		24,154
Costs applicable to sales	31,392		14,708
Amortization	6,843		4,451
Exploration	722		1,174
Other operating expenses	1,141		1,345
Interest and other income, net	(41)		19
Interest expense, net	(225)		(4)
Fair value adjustments, net	(2,292)		(673)
Income and mining tax benefit (expense)	(350)		0
Net income (loss)	1,025		1,818
Assets, Net	188,419		192,409
Capital expenditures	3,255		959
Coeur Capital [Member]
Financial information relating to reporting segments
Metal sales	1,945		2,890
Royalties	1,492		986
Revenue	3,437		3,876
Costs applicable to sales	633		1,182
Amortization	2,151		1,702
Exploration	75		203
Other operating expenses	17		241
Interest and other income, net	(1,525)		(2,548)
Interest expense, net	0		0
Fair value adjustments, net	0		0
Income and mining tax benefit (expense)	598		(288)
Net income (loss)	(366)		(2,288)
Assets, Net	57,930		67,173
Capital expenditures	0		0
Other Mining Properties [Member]
Financial information relating to reporting segments
Metal sales	0		0
Royalties	508		0
Revenue	508		0
Costs applicable to sales	0		0
Amortization	518		481
Exploration	648		765
Other operating expenses	13,481		18,666
Interest and other income, net	(307)		(1,155)
Interest expense, net	(8,856)		(10,184)
Fair value adjustments, net	(1,047)		(526)
Income and mining tax benefit (expense)	1,776		3,913
Net income (loss)	(22,573)		(27,864)
Assets, Net	80,181		521,766
Capital expenditures	37		1,083
Total [Member]
Financial information relating to reporting segments
Metal sales	150,956		158,647
Royalties	2,000		986
Revenue	152,956
Costs applicable to sales	115,062
Amortization	33,090
Other operating expenses	15,597		20,880
Interest and other income, net	(2,511)		(4,571)
Net income (loss)			(37,191)
Assets, Net			2,551,896
Capital expenditures	17,620		11,936
Wharf [Member]
Financial information relating to reporting segments
Metal sales	0
Royalties	0
Revenue	0
Costs applicable to sales	0
Amortization	0
Exploration	0
Other operating expenses	165
Interest and other income, net	17
Interest expense, net	0
Fair value adjustments, net	0
Income and mining tax benefit (expense)	686
Net income (loss)	538
Assets, Net	142,527
Capital expenditures	51
Mexico [Member]
Financial information relating to reporting segments
Revenue	40,141		68,511
Mexico [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Metal sales	39,394		67,988
Royalties	0		0
Revenue	39,394		67,988
BOLIVIA
Financial information relating to reporting segments
Revenue	$ 21,548		$ 27,554

[1] Excludes amortization.