Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Financial information relating to reporting segments
Total Revenue	$ 159,633		$ 171,797
Production costs applicable to sales	(106,896)		(88,059)	[1]
Amortization	(40,459)		(49,724)
Exploration	4,217		6,841
Write-downs	0		119
Interest and other income	(1,983)		3,856
Interest expense, net	(13,054)		(9,732)
Loss on termination of revolving credit facility	(3,035)		0
Fair value adjustments, net	(11,436)		17,796
Income tax benefit (expense)	4,689		(11,245)
Net income	(37,191)		12,270
Assets, Net					2,558,819
Capital expenditures	11,936		12,827
Palmarejo [Member]
Financial information relating to reporting segments
Production costs applicable to sales	43,574		26,718
Amortization	18,659		28,782
Exploration	1,005		1,980
Write-downs			0
Other operating expenses	297		168
Interest and other income	(1,569)		1,941
Interest expense, net	(2,824)		(3,738)
Fair value adjustments, net	(10,237)		14,429
Income tax benefit (expense)	3,828		(3,534)
Net income	(6,349)		8,876
Assets, Net	1,152,913	[2]			1,900,071	[2]
Capital expenditures	3,742	[3]	5,314	[3]
San Bartolome [Member]
Financial information relating to reporting segments
Production costs applicable to sales	18,901		15,678
Amortization	4,457		4,640
Exploration	26		53
Write-downs			0
Other operating expenses	140		3,837
Interest and other income	682		605
Interest expense, net	(20)		(32)
Fair value adjustments, net	0		0
Income tax benefit (expense)	(2,764)		(4,328)
Net income	1,928		5,178
Assets, Net	285,072	[2]			303,761	[2]
Capital expenditures	1,441	[3]	457	[3]
Kensington [Member]
Financial information relating to reporting segments
Metal sales	36,061		39,274
Royalties	0		0
Total Revenue	36,061		39,274
Production costs applicable to sales	28,531		23,565
Amortization	10,709		13,286
Exploration	1,044		672
Write-downs			0
Other operating expenses	191		176
Interest and other income	0		130
Interest expense, net	(22)		(259)
Fair value adjustments, net	0		4,227
Income tax benefit (expense)	0		0
Net income	(4,436)		5,673
Assets, Net	332,563	[2]			498,762	[2]
Capital expenditures	4,711	[3]	3,330	[3]
Rochester [Member]
Financial information relating to reporting segments
Metal sales	24,154		39,474
Royalties	0		0
Total Revenue	24,154		39,474
Production costs applicable to sales	14,708		20,777
Amortization	4,451		1,852
Exploration	1,174		484
Write-downs			0
Other operating expenses	1,345		473
Interest and other income	19		57
Interest expense, net	(4)		(5)
Fair value adjustments, net	(673)		0
Income tax benefit (expense)	0		(725)
Net income	1,818		15,215
Assets, Net	192,409	[2]			114,381	[2]
Capital expenditures	959	[3]	3,299	[3]
La Preciosa [Member]
Financial information relating to reporting segments
Metal sales	0		0
Royalties	0		0
Total Revenue	0		0
Production costs applicable to sales	0		0
Amortization	17		0
Exploration	184		0
Write-downs			0
Other operating expenses	4,971		0
Interest and other income	(16)		0
Interest expense, net	0		0
Fair value adjustments, net	0		0
Income tax benefit (expense)	(107)		0
Net income	(5,295)		0
Assets, Net	410,998	[2]			0	[2]
Capital expenditures	138	[3]	0	[3]
Coeur Capital [Member]
Financial information relating to reporting segments
Metal sales	2,890		2,983
Royalties	986		0
Total Revenue	3,876		2,983
Production costs applicable to sales	1,182		1,321
Amortization	1,702		828
Exploration	203		308
Write-downs			0
Other operating expenses	241		(54)
Interest and other income	(2,548)		11
Interest expense, net	0		0
Fair value adjustments, net	0		0
Income tax benefit (expense)	(288)		(54)
Net income	(2,288)		537
Assets, Net	67,173	[2]			32,311	[2]
Capital expenditures	0		0
Other Mining Properties [Member]
Financial information relating to reporting segments
Metal sales	0		(501)
Royalties	0		0
Total Revenue	0		(501)
Production costs applicable to sales	0		0
Amortization	464		336
Exploration	581		3,344
Write-downs			119
Other operating expenses	13,695		10,824
Interest and other income	(1,139)		1,077
Interest expense, net	(10,184)		(5,698)
Fair value adjustments, net	(526)		(860)
Income tax benefit (expense)	4,020		(2,604)
Net income	(22,569)		(23,209)
Assets, Net	110,768				114,378
Capital expenditures	945		427
Total [Member]
Financial information relating to reporting segments
Metal sales	158,647		171,797
Royalties	986		0
Total Revenue	159,633		171,797
Production costs applicable to sales	(106,896)		(88,059)
Amortization	(40,459)		(49,724)
Exploration	4,217		6,841
Other operating expenses	20,880		15,424
Interest and other income	(4,571)		3,821
Interest expense, net	13,054		9,732
Fair value adjustments, net	(11,436)		17,796
Income tax benefit (expense)	(4,689)		11,245
Net income	(37,191)		12,270
Assets, Net	2,551,896	[2]			2,963,664	[2]
Capital expenditures	11,936		12,827
Bolivia [Member]
Financial information relating to reporting segments
Metal sales	27,554		33,141
Royalties	0		0
Total Revenue	27,554		33,141
Bolivia [Member] | San Bartolome [Member]
Financial information relating to reporting segments
Total Revenue			33,141
Mexico [Member]
Financial information relating to reporting segments
Total Revenue	68,511		57,426
Mexico [Member] | Palmarejo [Member]
Financial information relating to reporting segments
Metal sales	67,988		57,426
Royalties	0		0
Total Revenue	$ 67,988		$ 57,426

[1] Excludes amortization.

[2] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjlhMDI3OWY3YWMxOTRiZDliYTc2YzYyODY4ZWI2ZWEzfFRleHRTZWxlY3Rpb246QjgzODNEMzNCRUVDMUNBMDA2OEFERkQ3M0EwOEUwQTIM}

[3] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOjlhMDI3OWY3YWMxOTRiZDliYTc2YzYyODY4ZWI2ZWEzfFRleHRTZWxlY3Rpb246M0MyOERCNDE4MDhEQkJCNEJEQTlERkQ3M0EwODM5NzcM}