Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Dec. 31, 2013
Financial information relating to reporting segments
Total Revenue	$ 170,938		$ 200,825		$ 495,133		$ 577,147
Costs applicable to sales	125,910	[1]	131,805	[1]	351,492	[1]	362,250	[1]
Amortization	41,985		60,097		123,834		166,686
Exploration	6,587		3,305		15,957		16,920
Litigation settlement	0		0		0		32,046
Interest and other income	(211)		(1,791)		(2,313)		2,484
Interest expense, net	(11,616)		(9,662)		(36,980)		(30,324)
Loss on termination of revolving credit facility	0		0		(3,035)		0
Fair value adjustments, net	16,105		(20,646)		(3,611)		63,905
Income tax benefit (expense)	16,583		2,058		18,650		(32,860)
Net income (loss)	3,466		(46,265)		(76,846)		(69,035)
Assets, Net	2,547,784				2,547,784				2,595,408
Capital expenditures	16,784		32,726		44,076		72,754
Palmarejo [Member]
Financial information relating to reporting segments
Costs applicable to sales	45,988		66,839		139,113		148,776
Amortization	16,493		33,475		53,196		97,641
Exploration	2,615		860		5,257		6,029
Litigation settlement			0				0
Other operating expenses	340		179		962		520
Interest and other income	284		(2,281)		(2,489)		(768)
Interest expense, net	(2,126)		(2,925)		(7,721)		(10,853)
Fair value adjustments, net	8,771		(15,260)		(6,454)		60,234
Income tax benefit (expense)	11,562		1,564		16,734		(17,383)
Net income (loss)	14,431		(15,731)		3,351		26,431
Assets, Net	1,111,829	[2]	1,825,599	[2]	1,111,829	[2]	1,825,599	[2]
Capital expenditures	5,857	[3]	10,290	[3]	15,188	[3]	24,770	[3]
San Bartolome [Member]
Financial information relating to reporting segments
Metal sales					84,983		111,196
Royalties					0		0
Costs applicable to sales	20,447		17,673		60,042		66,165
Amortization	5,117		4,788		14,430		14,252
Exploration	(19)		(3)		63		76
Litigation settlement			0				0
Other operating expenses	180		2,090		515		6,045
Interest and other income	583		582		1,957		1,871
Interest expense, net	(10)		(12)		(42)		(59)
Fair value adjustments, net	0		0		0		0
Income tax benefit (expense)	(2,969)		(4,648)		(7,937)		(13,482)
Net income (loss)	229		193		3,911		12,988
Assets, Net	304,644	[2]	289,274	[2]	304,644	[2]	289,274	[2]
Capital expenditures	2,783	[3]	4,166	[3]	5,935	[3]	7,782	[3]
Kensington [Member]
Financial information relating to reporting segments
Metal sales	45,922		38,927		111,000		109,053
Royalties	0		0		0		0
Total Revenue	45,922		38,927		111,000		109,053
Costs applicable to sales	34,668		27,484		86,417		81,203
Amortization	12,887		18,086		35,162		44,531
Exploration	2,638		1,496		5,318		2,732
Litigation settlement			0				0
Other operating expenses	202		98		591		510
Interest and other income	0		0		4		281
Interest expense, net	(70)		(51)		(145)		(405)
Fair value adjustments, net	0		(2,952)		0		7,626
Income tax benefit (expense)	0		0		0		(1)
Net income (loss)	(4,543)		(11,240)		(16,629)		(12,422)
Assets, Net	315,959	[2]	481,613	[2]	315,959	[2]	481,613	[2]
Capital expenditures	3,610	[3]	4,934	[3]	12,310	[3]	15,670	[3]
Rochester [Member]
Financial information relating to reporting segments
Metal sales	32,362		24,259		87,710		98,636
Royalties	0		0		0		0
Total Revenue	32,362		24,259		87,710		98,636
Costs applicable to sales	23,718		17,938		62,806		61,231
Amortization	5,359		2,518		14,835		6,360
Exploration	127		625		2,039		1,621
Litigation settlement			0				(32,046)
Other operating expenses	(87)		515		2,102		3,454
Interest and other income	39		60		90		117
Interest expense, net	(250)		(5)		(515)		(16)
Fair value adjustments, net	4,345		(2,363)		1,835		(2,363)
Income tax benefit (expense)	(210)		78		(629)		(1,186)
Net income (loss)	7,169		433		6,709		(9,524)
Assets, Net	208,284	[2]	161,993	[2]	208,284	[2]	161,993	[2]
Capital expenditures	4,194	[3]	12,267	[3]	9,110	[3]	22,161	[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		11		63		12
Exploration	20		(645)		229		19
Litigation settlement			0				0
Other operating expenses	2,338		1,933		13,006		2,082
Interest and other income	(209)		(71)		(226)		(84)
Interest expense, net	0		0		0		0
Fair value adjustments, net	0		0		0		0
Income tax benefit (expense)	5,305		(20)		4,034		(20)
Net income (loss)	2,716		(1,390)		(9,490)		(2,217)
Assets, Net	412,202	[2]	410,085	[2]	412,202	[2]	410,085	[2]
Capital expenditures	62	[3]	358	[3]	202	[3]	1,093	[3]
Coeur Capital [Member]
Financial information relating to reporting segments
Metal sales	2,367		4,296		7,227		10,757
Royalties	561		0		2,404		0
Total Revenue	2,928		4,296		9,631		10,757
Costs applicable to sales	1,089		1,871		3,114		4,875
Amortization	1,563		898		4,685		2,950
Exploration	150		184		462		814
Litigation settlement			0				0
Other operating expenses	342		(144)		868		(320)
Interest and other income	(1,480)		26		(4,988)		157
Interest expense, net	0		(1)		0		(1)
Fair value adjustments, net	0		0		0		0
Income tax benefit (expense)	214		(604)		(304)		(1,112)
Net income (loss)	(1,482)		908		(4,790)		1,482
Assets, Net	67,934	[2]	27,938	[2]	67,934	[2]	27,938	[2]
Capital expenditures	0		0		0		0
Other Mining Properties [Member]
Financial information relating to reporting segments
Metal sales	0		0		0		(662)
Royalties	0		0		0		0
Total Revenue	0		0		0		(662)
Costs applicable to sales	0		0		0		0
Amortization	544		321		1,463		940
Exploration	1,056		788		2,589		5,629
Litigation settlement			0				0
Other operating expenses	9,444		16,301		33,784		41,097
Interest and other income	(520)		(977)		(1,275)		(17,187)
Interest expense, net	(9,160)		(6,668)		(28,557)		(18,990)
Fair value adjustments, net	2,989		(71)		1,008		(1,592)
Income tax benefit (expense)	2,681		5,688		6,752		324
Net income (loss)	(15,054)		(19,438)		(59,908)		(85,773)
Assets, Net	126,932		115,666		126,932		115,666
Capital expenditures	278		711		1,331		1,278
Total [Member]
Financial information relating to reporting segments
Metal sales	170,377		200,825		492,729		577,147
Royalties	561		0		2,404		0
Total Revenue	170,938		200,825		495,133
Costs applicable to sales			131,805		351,492
Amortization			60,097		123,834
Exploration	6,587		3,305
Litigation settlement			0
Other operating expenses	12,759		20,972		51,828		53,388
Interest and other income	(1,303)		(2,661)		(6,927)		(15,613)
Interest expense, net	(11,616)		(9,662)
Fair value adjustments, net	16,105		(20,646)
Net income (loss)	3,466		(46,265)				(69,035)
Assets, Net			3,312,168	[2]			3,312,168	[2]
Capital expenditures	16,784		32,726		44,076		72,754
Bolivia [Member]
Financial information relating to reporting segments
Metal sales	28,350
Royalties	0
Total Revenue	28,350		28,819		84,983		111,196
Bolivia [Member] | San Bartolome [Member]
Financial information relating to reporting segments
Metal sales			28,819
Royalties			0
Total Revenue			28,819				111,196
Mexico [Member]
Financial information relating to reporting segments
Total Revenue	61,684		104,524		202,851		248,167
Mexico [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Metal sales	61,376		104,524		201,809		248,167
Royalties	0		0		0		0
Total Revenue	$ 61,376		$ 104,524		$ 201,809		$ 248,167

[1] Excludes amortization.

[2] Excludes amortization

[3] egment assets include receivables, prepaids, inventories, property, plant and equipment, and mineral interests