Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 123,539	$ 192,032
Receivables	40,759	19,069
Ore on leach pads	75,261	73,752
Inventory	62,154	58,230
Prepaid expenses and other	11,925	15,053
Assets held for sale	0	91,421
Current assets	313,638	449,557
Property, plant and equipment, net	273,337	254,737
Mining properties, net	861,379	829,569
Ore on leach pads	70,043	65,393
Restricted assets	21,635	20,847
Equity and debt securities	23,804	34,837
Receivables	53,046	28,750
Net investment in subsidiaries	0	0
Other	19,022	17,485
TOTAL ASSETS	1,635,904	1,701,175
Accounts payable	53,428	48,592
Accrued liabilities and other	61,664	94,930
Debt	21,745	30,753
Reclamation	3,777	3,777
Liabilities held for sale	0	50,677
Current liabilities	140,614	228,729
Debt	397,974	380,569
Reclamation	121,264	117,055
Deferred tax liabilities	102,626	105,148
Other long-term liabilities	54,655	54,697
Intercompany payable (receivable)	0	0
Non-current liabilities	676,519	657,469
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,074,029 issued and outstanding at June 30, 2018 and 185,637,724 at December 31, 2017	1,871	1,856
Additional paid-in capital	3,357,318	3,357,345
Accumulated deficit	(2,539,968)	(2,546,743)
Accumulated other comprehensive income (loss)	(450)	2,519
Stockholders' equity	818,771	814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,635,904	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	(458,938)	(422,279)
Other	(295,713)	(316,744)
TOTAL ASSETS	(754,651)	(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	(295,713)	(316,744)
Reclamation	0	0
Deferred tax liabilities	0	0
Other long-term liabilities	0	0
Intercompany payable (receivable)	0	0
Non-current liabilities	(295,713)	(316,744)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,074,029 issued and outstanding at June 30, 2018 and 185,637,724 at December 31, 2017	(214,650)	(214,650)
Additional paid-in capital	(2,047,334)	(2,034,240)
Accumulated deficit	1,803,046	1,823,148
Accumulated other comprehensive income (loss)	0	3,463
Stockholders' equity	(458,938)	(422,279)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(754,651)	(739,023)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	11,745	44,662
Receivables	17,522	137
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	4,517	7,824
Assets held for sale		0
Current assets	33,784	52,623
Property, plant and equipment, net	3,006	4,007
Mining properties, net	6,685	0
Ore on leach pads	0	0
Restricted assets	14,361	13,251
Equity and debt securities	23,710	33,569
Receivables	24,047	0
Net investment in subsidiaries	458,186	422,074
Other	299,038	320,335
TOTAL ASSETS	862,817	845,859
Accounts payable	1,603	3,607
Accrued liabilities and other	7,320	13,205
Debt	0	0
Reclamation	0	0
Liabilities held for sale		0
Current liabilities	8,923	16,812
Debt	360,471	345,088
Reclamation	0	0
Deferred tax liabilities	4,758	4,110
Other long-term liabilities	2,606	2,311
Intercompany payable (receivable)	(332,713)	(337,439)
Non-current liabilities	35,122	14,070
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,074,029 issued and outstanding at June 30, 2018 and 185,637,724 at December 31, 2017	1,871	1,856
Additional paid-in capital	3,357,318	3,357,345
Accumulated deficit	(2,539,967)	(2,546,743)
Accumulated other comprehensive income (loss)	(450)	2,519
Stockholders' equity	818,772	814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	862,817	845,859
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	40,200	52,239
Receivables	5,430	7,922
Ore on leach pads	75,261	73,752
Inventory	27,229	29,769
Prepaid expenses and other	898	2,816
Assets held for sale		0
Current assets	149,018	166,498
Property, plant and equipment, net	169,624	161,487
Mining properties, net	221,403	216,281
Ore on leach pads	70,043	65,393
Restricted assets	227	227
Equity and debt securities	94	1,268
Receivables	0	0
Net investment in subsidiaries	304	223
Other	11,923	11,040
TOTAL ASSETS	622,636	622,417
Accounts payable	21,982	24,534
Accrued liabilities and other	12,781	19,262
Debt	14,956	9,215
Reclamation	2,313	2,313
Liabilities held for sale		0
Current liabilities	52,032	55,324
Debt	30,503	28,313
Reclamation	84,595	82,021
Deferred tax liabilities	4,867	5,127
Other long-term liabilities	2,733	3,063
Intercompany payable (receivable)	311,987	317,759
Non-current liabilities	434,685	436,283
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,074,029 issued and outstanding at June 30, 2018 and 185,637,724 at December 31, 2017	19,630	19,630
Additional paid-in capital	144,724	149,194
Accumulated deficit	(28,435)	(34,551)
Accumulated other comprehensive income (loss)	0	(3,463)
Stockholders' equity	135,919	130,810
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	622,636	622,417
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	71,594	95,131
Receivables	17,807	11,010
Ore on leach pads	0	0
Inventory	34,925	28,461
Prepaid expenses and other	6,510	4,413
Assets held for sale		91,421
Current assets	130,836	230,436
Property, plant and equipment, net	100,707	89,243
Mining properties, net	633,291	613,288
Ore on leach pads	0	0
Restricted assets	7,047	7,369
Equity and debt securities	0	0
Receivables	28,999	28,750
Net investment in subsidiaries	448	(18)
Other	3,774	2,854
TOTAL ASSETS	905,102	971,922
Accounts payable	29,843	20,451
Accrued liabilities and other	41,563	62,463
Debt	6,789	21,538
Reclamation	1,464	1,464
Liabilities held for sale		50,677
Current liabilities	79,659	156,593
Debt	302,713	323,912
Reclamation	36,669	35,034
Deferred tax liabilities	93,001	95,911
Other long-term liabilities	49,316	49,323
Intercompany payable (receivable)	20,726	19,680
Non-current liabilities	502,425	523,860
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 187,074,029 issued and outstanding at June 30, 2018 and 185,637,724 at December 31, 2017	195,020	195,020
Additional paid-in capital	1,902,610	1,885,046
Accumulated deficit	(1,774,612)	(1,788,597)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	323,018	291,469
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 905,102	$ 971,922