Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 115,081	$ 192,032
Receivables	29,744	19,069
Ore on leach pads	75,122	73,752
Inventory	66,279	58,230
Prepaid expenses and other	11,393	15,053
Assets held for sale	0	91,421
Current assets	297,619	449,557
Property, plant and equipment, net	298,451	254,737
Mining properties, net	971,567	829,569
Ore on leach pads	66,964	65,393
Restricted assets	12,133	20,847
Equity and debt securities	17,806	34,837
Receivables	31,151	28,750
Net investment in subsidiaries	0	0
Other	16,809	17,485
TOTAL ASSETS	1,712,500	1,701,175
Accounts payable	47,210	48,592
Accrued liabilities and other	82,619	94,930
Debt	24,937	30,753
Reclamation	6,552	3,777
Liabilities held for sale	0	50,677
Current liabilities	161,318	228,729
Debt	433,889	380,569
Reclamation	128,994	117,055
Deferred tax liabilities	79,070	105,148
Other long-term liabilities	56,717	54,697
Intercompany payable (receivable)	0	0
Non-current liabilities	698,670	657,469
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 203,310,443 issued and outstanding at December 31, 2018 and 185,637,724 at December 31, 2017	2,033	1,856
Additional paid-in capital	3,443,082	3,357,345
Accumulated deficit	(2,592,544)	(2,546,743)
Accumulated other comprehensive income (loss)	(59)	2,519
Stockholders' equity	852,512	814,977	$ 768,487	$ 421,476
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,712,500	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	(594,925)	(422,279)
Other	(288,228)	(316,744)
TOTAL ASSETS	(883,153)	(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	(288,228)	(316,744)
Reclamation	0	0
Deferred tax liabilities	0	0
Other long-term liabilities	0	0
Intercompany payable (receivable)	0	0
Non-current liabilities	(288,228)	(316,744)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 203,310,443 issued and outstanding at December 31, 2018 and 185,637,724 at December 31, 2017	(234,030)	(214,650)
Additional paid-in capital	(2,208,375)	(2,034,240)
Accumulated deficit	1,847,480	1,823,148
Accumulated other comprehensive income (loss)	0	3,463
Stockholders' equity	(594,925)	(422,279)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(883,153)	(739,023)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	9,768	44,662
Receivables	5,333	137
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	4,378	7,824
Assets held for sale		0
Current assets	19,479	52,623
Property, plant and equipment, net	2,755	4,007
Mining properties, net	4,753	0
Ore on leach pads	0	0
Restricted assets	4,872	13,251
Equity and debt securities	17,797	33,569
Receivables	0	0
Net investment in subsidiaries	594,584	422,074
Other	291,249	320,335
TOTAL ASSETS	935,489	845,859
Accounts payable	2,181	3,607
Accrued liabilities and other	22,274	13,205
Debt	0	0
Reclamation	0	0
Liabilities held for sale		0
Current liabilities	24,455	16,812
Debt	380,854	345,088
Reclamation	0	0
Deferred tax liabilities	218	4,110
Other long-term liabilities	2,465	2,311
Intercompany payable (receivable)	(325,014)	(337,439)
Non-current liabilities	58,523	14,070
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 203,310,443 issued and outstanding at December 31, 2018 and 185,637,724 at December 31, 2017	2,033	1,856
Additional paid-in capital	3,443,082	3,357,345
Accumulated deficit	(2,592,545)	(2,546,743)
Accumulated other comprehensive income (loss)	(59)	2,519
Stockholders' equity	852,511	814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	935,489	845,859
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	25,518	52,239
Receivables	5,505	7,922
Ore on leach pads	75,122	73,752
Inventory	31,678	29,769
Prepaid expenses and other	1,846	2,816
Assets held for sale		0
Current assets	139,669	166,498
Property, plant and equipment, net	179,152	161,487
Mining properties, net	235,638	216,281
Ore on leach pads	66,964	65,393
Restricted assets	207	227
Equity and debt securities	9	1,268
Receivables	1,301	0
Net investment in subsidiaries	57	223
Other	11,619	11,040
TOTAL ASSETS	634,616	622,417
Accounts payable	19,244	24,534
Accrued liabilities and other	14,124	19,262
Debt	16,873	9,215
Reclamation	1,911	2,313
Liabilities held for sale		0
Current liabilities	52,152	55,324
Debt	36,377	28,313
Reclamation	84,092	82,021
Deferred tax liabilities	3,855	5,127
Other long-term liabilities	4,639	3,063
Intercompany payable (receivable)	303,084	317,759
Non-current liabilities	432,047	436,283
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 203,310,443 issued and outstanding at December 31, 2018 and 185,637,724 at December 31, 2017	19,630	19,630
Additional paid-in capital	164,506	149,194
Accumulated deficit	(33,719)	(34,551)
Accumulated other comprehensive income (loss)	0	(3,463)
Stockholders' equity	150,417	130,810
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	634,616	622,417
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	79,795	95,131
Receivables	18,906	11,010
Ore on leach pads	0	0
Inventory	34,601	28,461
Prepaid expenses and other	5,169	4,413
Assets held for sale		91,421
Current assets	138,471	230,436
Property, plant and equipment, net	116,544	89,243
Mining properties, net	731,176	613,288
Ore on leach pads	0	0
Restricted assets	7,054	7,369
Equity and debt securities	0	0
Receivables	29,850	28,750
Net investment in subsidiaries	284	(18)
Other	2,169	2,854
TOTAL ASSETS	1,025,548	971,922
Accounts payable	25,785	20,451
Accrued liabilities and other	46,221	62,463
Debt	8,064	21,538
Reclamation	4,641	1,464
Liabilities held for sale		50,677
Current liabilities	84,711	156,593
Debt	304,886	323,912
Reclamation	44,902	35,034
Deferred tax liabilities	74,997	95,911
Other long-term liabilities	49,613	49,323
Intercompany payable (receivable)	21,930	19,680
Non-current liabilities	496,328	523,860
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 203,310,443 issued and outstanding at December 31, 2018 and 185,637,724 at December 31, 2017	214,400	195,020
Additional paid-in capital	2,043,869	1,885,046
Accumulated deficit	(1,813,760)	(1,788,597)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	444,509	291,469
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,025,548	$ 971,922