Segment Reporting (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financial information relating to reporting segments
Revenue		$ 162,552	$ 170,938	$ 481,770	$ 495,133
Costs applicable to sales	[1]	120,237	125,910	354,397	351,492
Amortization		35,497	41,985	107,560	123,834
Exploration		2,112	6,587	9,957	15,957
Fair value adjustments, net		5,786	16,105	3,657	(3,611)
Interest expense, net		(12,446)	(11,616)	(33,945)	(36,980)
Other, net		(8,893)	(1,303)	(14,257)	(6,927)
Income and mining tax benefit (expense)		8,260	16,583	8,451	18,650
Net income (loss)		(14,219)	3,466	(64,185)	(76,846)
Assets, Net		1,458,659		1,458,659		$ 1,084,257
Capital expenditures		23,861	16,784	65,158	44,076
Palmarejo [Member]
Financial information relating to reporting segments
Metal sales		49,187	61,376	127,455	201,809
Royalties		0	0	0	0
Revenue		49,187	61,376	127,455	201,809
Costs applicable to sales		34,093	45,988	98,695	139,113
Amortization		8,617	16,493	24,997	53,196
Exploration		1,087	2,615	4,047	5,257
Other operating expenses		303	340	940	962
Fair value adjustments, net		2,998	8,771	1,882	(6,454)
Interest expense, net		(928)	(2,126)	(3,112)	(7,721)
Other, net		(7,870)	284	(9,478)	(2,489)
Income and mining tax benefit (expense)		(10,370)	11,562	(9,836)	16,734
Net income (loss)		9,657	14,431	(2,096)	3,351
Assets, Net		653,501	1,111,829	653,501	1,111,829
Capital expenditures		10,514	5,857	30,421	15,188
San Bartolome [Member]
Financial information relating to reporting segments
Metal sales		17,391	28,350	62,304	84,983
Royalties		0	0	0	0
Revenue		17,391	28,350	62,304	84,983
Costs applicable to sales		17,483	20,447	55,767	60,042
Amortization		3,526	5,117	13,487	14,430
Exploration		54	(19)	132	63
Other operating expenses		1,059	180	1,544	515
Fair value adjustments, net		0	4,345	0	0
Interest expense, net		(100)	(10)	(674)	(42)
Other, net		347	39	1,219	1,957
Income and mining tax benefit (expense)		1,029	(2,969)	2,240	(7,937)
Net income (loss)		(5,513)	229	(10,322)	3,911
Assets, Net		165,931	304,644	165,931	304,644
Capital expenditures		1,786	2,783	3,729	5,935
Kensington [Member]
Financial information relating to reporting segments
Metal sales		30,466	45,922	116,971	111,000
Royalties		0	0	0	0
Revenue		30,466	45,922	116,971	111,000
Costs applicable to sales		24,973	34,668	81,844	86,417
Amortization		8,499	12,887	32,738	35,162
Exploration		217	2,638	2,311	5,318
Other operating expenses		254	202	1,015	591
Fair value adjustments, net		0	0	0	0
Interest expense, net		(51)	(70)	(172)	(145)
Other, net		1	0	(16)	4
Income and mining tax benefit (expense)		(406)	0	587	0
Net income (loss)		(3,122)	(4,543)	(1,712)	(16,629)
Assets, Net		193,712	315,959	193,712	315,959
Capital expenditures		5,522	3,610	14,380	12,310
La Preciosa [Member]
Financial information relating to reporting segments
Fair value adjustments, net			0
Other, net			583
Rochester [Member]
Financial information relating to reporting segments
Metal sales		34,638	32,362	115,010	87,710
Royalties		0	0	0	0
Revenue		34,638	32,362	115,010	87,710
Costs applicable to sales		25,436	23,718	81,221	62,806
Amortization		6,731	5,359	18,962	14,835
Exploration		49	127	1,272	2,039
Other operating expenses		742	(87)	2,190	2,102
Fair value adjustments, net		1,752		596	1,835
Interest expense, net		(168)	(250)	(598)	(515)
Other, net		1		(38)	90
Income and mining tax benefit (expense)		1,053	(210)	1,753	(629)
Net income (loss)		2,212	7,169	9,573	6,709
Assets, Net		192,348	208,284	192,348	208,284
Capital expenditures		5,281	4,194	14,451	9,110
Coeur Capital [Member]
Financial information relating to reporting segments
Metal sales		1,264	2,367	6,292	7,227
Royalties		1,620	561	5,379	2,404
Revenue		2,884	2,928	11,671	9,631
Costs applicable to sales		475	1,089	2,460	3,114
Amortization		1,983	1,563	6,753	4,685
Exploration		(362)	150	(212)	462
Other operating expenses		(38)	342	(8)	868
Fair value adjustments, net		0	0	0	0
Interest expense, net		0	0	0	0
Other, net		(455)	(1,480)	(2,904)	(4,988)
Income and mining tax benefit (expense)		(291)	214	(266)	(304)
Net income (loss)		662	(1,482)	40	(4,790)
Assets, Net		51,553	67,934	51,553	67,934
Capital expenditures		0	0	0	0
Other Mining Properties [Member]
Financial information relating to reporting segments
Metal sales		0	0	0	0
Royalties		0	0	0	0
Revenue		0	0	0	0
Costs applicable to sales		0	0	0	0
Amortization		499	566	1,490	1,526
Exploration		1,067	1,076	2,407	2,818
Other operating expenses		8,795	11,782	31,078	46,790
Fair value adjustments, net		1,036	2,989	1,179	1,008
Interest expense, net		(11,199)	(9,160)	(29,389)	(28,557)
Other, net		(970)	(729)	(3,148)	(1,501)
Income and mining tax benefit (expense)		182	7,986	3,424	10,786
Net income (loss)		(21,310)	(12,338)	(62,909)	(69,398)
Assets, Net		76,860	539,134	76,860	539,134
Capital expenditures		93	340	218	1,533
Wharf [Member]
Financial information relating to reporting segments
Metal sales		27,986		48,359
Royalties		0		0
Revenue		27,986		48,359
Costs applicable to sales		17,777		34,410
Amortization		5,642		9,133
Exploration		0		0
Other operating expenses		517		1,188
Fair value adjustments, net		0		0
Interest expense, net		0		0
Other, net		53		108
Income and mining tax benefit (expense)		907		495
Net income (loss)		3,195		3,241
Assets, Net		124,754		124,754
Capital expenditures		665		1,959
Total [Member]
Financial information relating to reporting segments
Metal sales		160,932	170,377	476,391	492,729
Royalties		1,620	561	5,379	2,404
Revenue		162,552	170,938	481,770
Costs applicable to sales		120,237	125,910	354,397
Amortization		35,497	41,985	107,560
Other operating expenses		11,632	12,759	37,947	51,828
Other, net		(8,893)	(1,303)	(14,257)	(6,927)
Net income (loss)		(14,219)	3,466		(76,846)
Assets, Net			2,547,784		2,547,784
Capital expenditures		23,861	16,784	65,158	44,076
United States [Member]
Financial information relating to reporting segments
Revenue		93,091	78,284	280,340	198,710
Mexico [Member]
Financial information relating to reporting segments
Revenue		50,170	61,684	129,753	202,851
San Bartolome [Member]
Financial information relating to reporting segments
Revenue		17,391
BOLIVIA
Financial information relating to reporting segments
Revenue			28,350	62,304	84,983
Australia [Member]
Financial information relating to reporting segments
Revenue		1,264	2,367	6,292	7,227
Other Foreign Countries [Member]
Financial information relating to reporting segments
Revenue		$ 636	$ 253	3,081	$ 1,362
Accumulated Deficit [Member]
Financial information relating to reporting segments
Net income (loss)				$ (64,185)

[1] Excludes amortization.