Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Financial information relating to reporting segments
Metal sales		$ 146,636	$ 150,956
Royalties		1,751	2,000
Revenue		148,387	152,956
Costs applicable to sales	[1]	101,555	115,062
Amortization		27,964	33,090
Exploration		1,731	4,266
Write-downs		4,446	0
Other operating expenses		12,480	15,597
Fair value adjustments, net		(8,695)	(4,884)
Interest expense, net		(11,120)	(10,765)
Other, net		1,314	(2,511)
Income and mining tax benefit (expense)		(2,106)	(68)
Net income (loss)		(20,396)	(33,287)
Assets, Net		1,117,940	1,200,153	$ 1,103,310
Capital expenditures		22,172	17,620
Palmarejo [Member]
Financial information relating to reporting segments
Metal sales		29,813	39,394
Royalties		0	0
Revenue		29,813	39,394
Costs applicable to sales		21,038	34,491
Amortization		7,289	7,333
Exploration		801	1,123
Write-downs		0	0
Other operating expenses		315	314
Fair value adjustments, net		(4,864)	(1,545)
Interest expense, net		(734)	(1,340)
Other, net		(1,235)	(1,103)
Income and mining tax benefit (expense)		98	(1,371)
Net income (loss)		(6,365)	(9,226)
Assets, Net		422,086	346,250
Capital expenditures		8,815	9,184
Rochester [Member]
Financial information relating to reporting segments
Metal sales		29,982	44,031
Royalties		0	0
Revenue		29,982	44,031
Costs applicable to sales		22,485	31,392
Amortization		5,313	6,843
Exploration		109	722
Write-downs		0	0
Other operating expenses		681	1,141
Fair value adjustments, net		(2,249)	(2,292)
Interest expense, net		(171)	(225)
Other, net		3	(41)
Income and mining tax benefit (expense)		(423)	(350)
Net income (loss)		(1,446)	1,025
Assets, Net		209,692	188,419
Capital expenditures		3,289	3,255
Kensington [Member]
Financial information relating to reporting segments
Metal sales		35,743	44,038
Royalties		0	0
Revenue		35,743	44,038
Costs applicable to sales		24,418	29,419
Amortization		8,349	11,554
Exploration		(47)	1,662
Write-downs		0	0
Other operating expenses		252	235
Fair value adjustments, net		0	0
Interest expense, net		(43)	(63)
Other, net		(20)	(4)
Income and mining tax benefit (expense)		0	0
Net income (loss)		2,708	1,101
Assets, Net		192,805	205,208
Capital expenditures		8,090	4,144
Wharf [Member]
Financial information relating to reporting segments
Metal sales		27,929	0
Royalties		0	0
Revenue		27,929	0
Costs applicable to sales		15,461	0
Amortization		4,051	0
Exploration		0	0
Write-downs		0	0
Other operating expenses		493	165
Fair value adjustments, net		0	0
Interest expense, net		0	0
Other, net		10	17
Income and mining tax benefit (expense)		116	686
Net income (loss)		8,050	538
Assets, Net		113,383	142,527
Capital expenditures		1,410	51
San Bartolome [Member]
Financial information relating to reporting segments
Metal sales		21,278	21,548
Royalties		0	0
Revenue		21,278	21,548
Costs applicable to sales		17,497	19,127
Amortization		1,754	4,691
Exploration		0	36
Write-downs		0	0
Other operating expenses		291	244
Fair value adjustments, net		0	0
Interest expense, net		(3)	(281)
Other, net		315	452
Income and mining tax benefit (expense)		(1,571)	(1,407)
Net income (loss)		477	(3,786)
Assets, Net		87,750	179,638
Capital expenditures		521	949
Coeur Capital [Member]
Financial information relating to reporting segments
Metal sales		1,891	1,945
Royalties		1,751	2,000
Revenue		3,642	3,945
Costs applicable to sales		656	633
Amortization		781	2,151
Exploration		121	75
Write-downs		4,446	0
Other operating expenses		137	17
Fair value adjustments, net		0	0
Interest expense, net		0	0
Other, net		2,282	(1,525)
Income and mining tax benefit (expense)		(1,292)	598
Net income (loss)		(1,509)	142
Assets, Net		17,863	57,930
Capital expenditures		0	0
Other Mining Properties [Member]
Financial information relating to reporting segments
Metal sales		0	0
Royalties		0	0
Revenue		0	0
Costs applicable to sales		0	0
Amortization		427	518
Exploration		747	648
Write-downs		0	0
Other operating expenses		10,311	13,481
Fair value adjustments, net		(1,582)	(1,047)
Interest expense, net		(10,169)	(8,856)
Other, net		(41)	(307)
Income and mining tax benefit (expense)		966	1,776
Net income (loss)		(22,311)	(23,081)
Assets, Net		74,361	80,181
Capital expenditures		$ 47	$ 37

[1] Excludes amortization.