Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Financial information relating to reporting segments
Total Revenue	$ 164,562		$ 204,525		$ 324,195		$ 376,322
Costs applicable to sales	118,687	[1]	142,386	[1]	225,583	[1]	230,444	[1]
Amortization	41,422		56,894		81,849		106,589
Exploration	5,153		6,774		9,370		13,615
Loss Related to Litigation Settlement	0		32,046		0		32,046
Interest and other income	(116)		419		(2,100)		4,275
Interest expense, net	(12,310)		(10,930)		(25,365)		(20,662)
Loss on termination of revolving credit facility	0		0		(3,035)		0
Fair value adjustments, net	(8,282)		66,754		(19,717)		84,550
Income tax benefit (expense)	(2,621)		(23,673)		2,068		(34,918)
Net income (loss)	(43,121)		(35,040)		(80,312)		(22,770)
Assets, Net	2,571,728				2,571,728				2,595,408
Capital expenditures	15,356		27,201		27,292		40,028
Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales	49,551		55,218		93,126		81,937
Amortization	18,044		35,384		36,702		64,166
Exploration	1,637		3,189		2,642		5,170
Loss Related to Litigation Settlement			0				0
Other operating expenses	325		173		622		341
Interest and other income	(1,202)		(428)		(2,772)		1,514
Interest expense, net	(2,771)		(4,190)		(5,595)		(7,928)
Fair value adjustments, net	(4,989)		61,066		(15,225)		75,494
Income tax benefit (expense)	1,342		(17,282)		5,171		(20,816)
Net income (loss)	(4,731)		31,419		(11,079)		40,293
Assets, Net	1,133,851	[2]	1,860,240	[2]	1,133,851	[2]	1,860,240	[2]
Capital expenditures	5,589	[3]	9,166	[3]	9,331	[3]	14,480	[3]
San Bartolome [Member]
Financial information relating to reporting segments
Metal sales					56,632		82,377
Royalties					0		0
Costs applicable to sales	20,695		32,815		39,595		48,494
Amortization	4,855		4,824		9,313		9,464
Exploration	57		27		82		79
Loss Related to Litigation Settlement			0				0
Other operating expenses	194		117		335		3,954
Interest and other income	691		683		1,373		1,288
Interest expense, net	(11)		(14)		(31)		(46)
Fair value adjustments, net	0		0		0		0
Income tax benefit (expense)	(2,204)		(4,506)		(4,969)		(8,834)
Net income (loss)	1,753		7,616		3,680		12,794
Assets, Net	309,565	[2]	286,325	[2]	309,565	[2]	286,325	[2]
Capital expenditures	1,711	[3]	3,159	[3]	3,152	[3]	3,616	[3]
Kensington [Member]
Financial information relating to reporting segments
Metal sales	29,018		30,851		65,079		70,126
Royalties	0		0		0		0
Total Revenue	29,018		30,851		65,079		70,126
Costs applicable to sales	23,218		30,154		51,749		53,718
Amortization	11,566		13,159		22,275		26,445
Exploration	1,636		563		2,680		1,235
Loss Related to Litigation Settlement			0				0
Other operating expenses	199		236		390		412
Interest and other income	4		150		4		281
Interest expense, net	(53)		(95)		(75)		(354)
Fair value adjustments, net	0		6,350		0		10,577
Income tax benefit (expense)	0		0		0		(1)
Net income (loss)	(7,650)		(6,856)		(12,086)		(1,181)
Assets, Net	331,151	[2]	485,215	[2]	331,151	[2]	485,215	[2]
Capital expenditures	3,989	[3]	7,406	[3]	8,700	[3]	10,736	[3]
Rochester [Member]
Financial information relating to reporting segments
Metal sales	31,193		34,903		55,347		74,377
Royalties	0		0		0		0
Total Revenue	31,193		34,903		55,347		74,377
Costs applicable to sales	24,381		22,516		39,089		43,293
Amortization	5,025		1,989		9,476		3,842
Exploration	738		512		1,912		996
Loss Related to Litigation Settlement			32,046				(32,046)
Other operating expenses	844		2,466		2,189		2,938
Interest and other income	32		0		51		57
Interest expense, net	(261)		(5)		(266)		(11)
Fair value adjustments, net	(1,837)		0		(2,510)		0
Income tax benefit (expense)	(419)		(538)		(419)		(1,264)
Net income (loss)	(2,280)		(25,169)		(463)		(9,956)
Assets, Net	206,665	[2]	122,917	[2]	206,665	[2]	122,917	[2]
Capital expenditures	3,956	[3]	6,596	[3]	4,915	[3]	9,894	[3]
La Preciosa [Member]
Financial information relating to reporting segments
Metal sales	0		0		0		0
Royalties	0		0		0		0
Total Revenue	0		0		0		0
Costs applicable to sales	0		0		0		0
Amortization	22		2		41		2
Exploration	26		690		210		690
Loss Related to Litigation Settlement			0				0
Other operating expenses	5,711		0		10,668		0
Interest and other income	118		(11)		(17)		(11)
Interest expense, net	0		0		0		0
Fair value adjustments, net	0		0		0		0
Income tax benefit (expense)	(1,159)		0		(1,271)		0
Net income (loss)	(6,800)		(703)		(12,207)		(703)
Assets, Net	412,226	[2]	409,458	[2]	412,226	[2]	409,458	[2]
Capital expenditures	3	[3]	735	[3]	141	[3]	735	[3]
Coeur Capital [Member]
Financial information relating to reporting segments
Metal sales	1,971		3,479		4,860		6,461
Royalties	856		0		1,843		0
Total Revenue	2,827		3,479		6,703		6,461
Costs applicable to sales	842		1,683		2,024		3,002
Amortization	1,419		1,224		3,121		2,052
Exploration	109		322		312		630
Loss Related to Litigation Settlement			0				0
Other operating expenses	263		(191)		504		(245)
Interest and other income	(964)		91		(3,512)		138
Interest expense, net	0		0		0		0
Fair value adjustments, net	0		0		0		0
Income tax benefit (expense)	263		(191)		(25)		(245)
Net income (loss)	(507)		341		(2,795)		915
Assets, Net	67,864	[2]	31,493	[2]	67,864	[2]	31,493	[2]
Capital expenditures	0		0		0		0
Other Mining Properties [Member]
Financial information relating to reporting segments
Metal sales	0		(161)		0		(662)
Royalties	0		0		0		0
Total Revenue	0		(161)		0		(662)
Costs applicable to sales	0		0		0		0
Amortization	491		312		921		618
Exploration	950		1,471		1,532		4,815
Loss Related to Litigation Settlement			0				0
Other operating expenses	10,622		14,042		24,361		25,016
Interest and other income	271		(17,258)		(749)		(16,219)
Interest expense, net	(9,214)		(6,626)		(19,398)		(12,323)
Fair value adjustments, net	(1,456)		(662)		(1,982)		(1,521)
Income tax benefit (expense)	(444)		(1,156)		3,581		(3,758)
Net income (loss)	(22,906)		(41,688)		(45,362)		(64,932)
Assets, Net	110,406		108,954		110,406		108,954
Capital expenditures	108		139		1,053		567
Total [Member]
Financial information relating to reporting segments
Metal sales	163,706		204,525		322,352		376,322
Royalties	856		0		1,843		0
Total Revenue	164,562		204,525		324,195
Costs applicable to sales			142,386		225,583
Amortization			56,894		81,849
Exploration	5,153		6,774
Loss Related to Litigation Settlement			32,046
Other operating expenses	18,158		16,843		39,069		32,416
Interest and other income	(1,050)		(16,773)		(5,622)		(12,952)
Interest expense, net	(12,310)		(10,930)
Fair value adjustments, net	(8,282)		66,754
Net income (loss)	(43,121)		(35,040)				(22,770)
Assets, Net			3,304,602	[2]			3,304,602	[2]
Capital expenditures	15,356		27,201		27,292		40,028
Bolivia [Member]
Financial information relating to reporting segments
Metal sales	29,078
Royalties	0
Total Revenue	29,078		49,236		56,632		82,377
Bolivia [Member] | San Bartolome [Member]
Financial information relating to reporting segments
Metal sales			49,236
Royalties			0
Total Revenue			49,236				82,377
Mexico [Member]
Financial information relating to reporting segments
Total Revenue	72,657		86,217		141,167		143,643
Mexico [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Metal sales	72,446		86,217		140,434		143,643
Royalties	0		0		0		0
Total Revenue	$ 72,446		$ 86,217		$ 140,434		$ 143,643

[1] Excludes amortization.

[2] Excludes amortization

[3] Segment assets consist of receivables, prepaids, inventories, property, plant and equipment, and mineral interests