Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 104,746	$ 192,032
Receivables	30,480	19,069
Ore on leach pads	77,515	73,752
Inventory	62,569	58,230
Prepaid expenses and other	12,167	15,053
Assets held for sale	0	91,421
Current assets	287,477	449,557
Property, plant and equipment, net	285,871	254,737
Mining properties, net	865,043	829,569
Ore on leach pads	67,420	65,393
Restricted assets	21,361	20,847
Equity and debt securities	24,232	34,837
Receivables	28,035	28,750
Net investment in subsidiaries	0	0
Other	18,938	17,485
TOTAL ASSETS	1,598,377	1,701,175
Accounts payable	55,132	48,592
Accrued liabilities and other	65,400	94,930
Debt	22,696	30,753
Reclamation	3,777	3,777
Liabilities held for sale	0	50,677
Current liabilities	147,005	228,729
Debt	406,494	380,569
Reclamation	122,977	117,055
Deferred tax liabilities	98,891	105,148
Other long-term liabilities	55,227	54,697
Intercompany payable (receivable)	0	0
Non-current liabilities	683,589	657,469
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,026,334 issued and outstanding at September 30, 2018 and 185,637,724 at December 31, 2017	1,870	1,856
Additional paid-in capital	3,359,183	3,357,345
Accumulated deficit	(2,593,012)	(2,546,743)
Accumulated other comprehensive income (loss)	(258)	2,519
Stockholders' equity	767,783	814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,598,377	1,701,175
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0
Receivables	0	0
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	0	0
Assets held for sale		0
Current assets	0	0
Property, plant and equipment, net	0	0
Mining properties, net	0	0
Ore on leach pads	0	0
Restricted assets	0	0
Equity and debt securities	0	0
Receivables	0	0
Net investment in subsidiaries	(459,616)	(422,279)
Other	(294,724)	(316,744)
TOTAL ASSETS	(754,340)	(739,023)
Accounts payable	0	0
Accrued liabilities and other	0	0
Debt	0	0
Reclamation	0	0
Liabilities held for sale		0
Current liabilities	0	0
Debt	(294,724)	(316,744)
Reclamation	0	0
Deferred tax liabilities	0	0
Other long-term liabilities	0	0
Intercompany payable (receivable)	0	0
Non-current liabilities	(294,724)	(316,744)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,026,334 issued and outstanding at September 30, 2018 and 185,637,724 at December 31, 2017	(234,030)	(214,650)
Additional paid-in capital	(2,071,172)	(2,034,240)
Accumulated deficit	1,845,586	1,823,148
Accumulated other comprehensive income (loss)	0	3,463
Stockholders' equity	(459,616)	(422,279)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(754,340)	(739,023)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	11,432	44,662
Receivables	9,697	137
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	4,938	7,824
Assets held for sale		0
Current assets	26,067	52,623
Property, plant and equipment, net	2,893	4,007
Mining properties, net	4,753	0
Ore on leach pads	0	0
Restricted assets	14,359	13,251
Equity and debt securities	24,218	33,569
Receivables	0	0
Net investment in subsidiaries	459,064	422,074
Other	297,919	320,335
TOTAL ASSETS	829,273	845,859
Accounts payable	2,244	3,607
Accrued liabilities and other	11,701	13,205
Debt	0	0
Reclamation	0	0
Liabilities held for sale		0
Current liabilities	13,945	16,812
Debt	365,662	345,088
Reclamation	0	0
Deferred tax liabilities	5,179	4,110
Other long-term liabilities	2,627	2,311
Intercompany payable (receivable)	(325,923)	(337,439)
Non-current liabilities	47,545	14,070
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,026,334 issued and outstanding at September 30, 2018 and 185,637,724 at December 31, 2017	1,870	1,856
Additional paid-in capital	3,359,183	3,357,345
Accumulated deficit	(2,593,012)	(2,546,743)
Accumulated other comprehensive income (loss)	(258)	2,519
Stockholders' equity	767,783	814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	829,273	845,859
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	22,496	52,239
Receivables	3,355	7,922
Ore on leach pads	77,515	73,752
Inventory	28,751	29,769
Prepaid expenses and other	1,430	2,816
Assets held for sale		0
Current assets	133,547	166,498
Property, plant and equipment, net	176,645	161,487
Mining properties, net	221,969	216,281
Ore on leach pads	67,420	65,393
Restricted assets	227	227
Equity and debt securities	14	1,268
Receivables	0	0
Net investment in subsidiaries	258	223
Other	11,846	11,040
TOTAL ASSETS	611,926	622,417
Accounts payable	21,697	24,534
Accrued liabilities and other	11,148	19,262
Debt	16,913	9,215
Reclamation	2,313	2,313
Liabilities held for sale		0
Current liabilities	52,071	55,324
Debt	33,022	28,313
Reclamation	85,376	82,021
Deferred tax liabilities	4,928	5,127
Other long-term liabilities	3,178	3,063
Intercompany payable (receivable)	305,823	317,759
Non-current liabilities	432,327	436,283
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,026,334 issued and outstanding at September 30, 2018 and 185,637,724 at December 31, 2017	39,010	19,630
Additional paid-in capital	143,542	149,194
Accumulated deficit	(55,024)	(34,551)
Accumulated other comprehensive income (loss)	0	(3,463)
Stockholders' equity	127,528	130,810
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	611,926	622,417
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	70,818	95,131
Receivables	17,428	11,010
Ore on leach pads	0	0
Inventory	33,818	28,461
Prepaid expenses and other	5,799	4,413
Assets held for sale		91,421
Current assets	127,863	230,436
Property, plant and equipment, net	106,333	89,243
Mining properties, net	638,321	613,288
Ore on leach pads	0	0
Restricted assets	6,775	7,369
Equity and debt securities	0	0
Receivables	28,035	28,750
Net investment in subsidiaries	294	(18)
Other	3,897	2,854
TOTAL ASSETS	911,518	971,922
Accounts payable	31,191	20,451
Accrued liabilities and other	42,551	62,463
Debt	5,783	21,538
Reclamation	1,464	1,464
Liabilities held for sale		50,677
Current liabilities	80,989	156,593
Debt	302,534	323,912
Reclamation	37,601	35,034
Deferred tax liabilities	88,784	95,911
Other long-term liabilities	49,422	49,323
Intercompany payable (receivable)	20,100	19,680
Non-current liabilities	498,441	523,860
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,026,334 issued and outstanding at September 30, 2018 and 185,637,724 at December 31, 2017	195,020	195,020
Additional paid-in capital	1,927,630	1,885,046
Accumulated deficit	(1,790,562)	(1,788,597)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	332,088	291,469
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 911,518	$ 971,922