Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 69,033	$ 115,081
Receivables	33,530	29,744
Ore on leach pads	74,517	75,122
Inventory	60,653	66,279
Prepaid expenses and other	13,681	11,393
Assets held for sale		0
Current assets	251,414	297,619
Property, plant and equipment, net	299,756	298,451
Mining properties, net	962,058	971,567
Ore on leach pads	72,633	66,964
Restricted assets	10,444	12,133
Equity and debt securities	25,875	17,806
Receivables	31,571	31,151
Net investment in subsidiaries	0	0
Other	77,614	16,809
TOTAL ASSETS	1,731,365	1,712,500
Accounts payable	51,777	47,210
Accrued liabilities and other	102,136	82,619
Debt	24,520	24,937
Reclamation	6,552	6,552
Current liabilities	184,985	161,318
Debt	432,269	433,889
Reclamation	131,275	128,994
Deferred tax liabilities	70,811	79,070
Other long-term liabilities	79,690	56,717
Intercompany payable (receivable)	0	0
Non-current liabilities	714,045	698,670
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 205,111,221 issued and outstanding at March 31, 2019 and 203,310,443 at December 31, 2018	2,051	2,033
Additional paid-in capital	3,442,029	3,443,082
Accumulated deficit	(2,611,745)	(2,592,544)
Accumulated other comprehensive income (loss)	0	(59)
Stockholders' equity	832,335	852,512	$ 814,311	$ 814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,731,365	1,712,500
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	(568,812)	(594,925)
Other	(290,552)	(288,228)
TOTAL ASSETS	(859,364)	(883,153)
Accounts payable	0	0
Accrued liabilities and other	0	0
Debt	0	0
Reclamation	0	0
Current liabilities	0	0
Debt	(291,035)	(288,228)
Reclamation	0	0
Deferred tax liabilities	0	0
Other long-term liabilities	483	0
Intercompany payable (receivable)	0	0
Non-current liabilities	(290,552)	(288,228)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 205,111,221 issued and outstanding at March 31, 2019 and 203,310,443 at December 31, 2018	(234,709)	(234,030)
Additional paid-in capital	(2,219,024)	(2,208,375)
Accumulated deficit	1,884,921	1,847,480
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	(568,812)	(594,925)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(859,364)	(883,153)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	10,185	9,768
Receivables	1,915	5,333
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	6,622	4,378
Assets held for sale		0
Current assets	18,722	19,479
Property, plant and equipment, net	2,572	2,755
Mining properties, net	4,753	4,753
Ore on leach pads	0	0
Restricted assets	3,082	4,872
Equity and debt securities	25,875	17,797
Receivables	0	0
Net investment in subsidiaries	568,606	594,584
Other	296,492	291,249
TOTAL ASSETS	920,102	935,489
Accounts payable	2,536	2,181
Accrued liabilities and other	17,478	22,274
Debt	0	0
Reclamation	0	0
Current liabilities	20,014	24,455
Debt	381,045	380,854
Reclamation	0	0
Deferred tax liabilities	2,067	218
Other long-term liabilities	5,169	2,465
Intercompany payable (receivable)	(320,528)	(325,014)
Non-current liabilities	67,753	58,523
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 205,111,221 issued and outstanding at March 31, 2019 and 203,310,443 at December 31, 2018	2,051	2,033
Additional paid-in capital	3,442,029	3,443,082
Accumulated deficit	(2,611,745)	(2,592,545)
Accumulated other comprehensive income (loss)	0	(59)
Stockholders' equity	832,335	852,511
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	920,102	935,489
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	10,488	25,518
Receivables	7,932	5,505
Ore on leach pads	74,517	75,122
Inventory	26,963	31,678
Prepaid expenses and other	821	1,846
Assets held for sale		0
Current assets	120,721	139,669
Property, plant and equipment, net	177,473	179,152
Mining properties, net	235,101	235,638
Ore on leach pads	72,633	66,964
Restricted assets	206	207
Equity and debt securities	0	9
Receivables	1,300	1,301
Net investment in subsidiaries	45	57
Other	58,211	11,619
TOTAL ASSETS	665,690	634,616
Accounts payable	17,180	19,244
Accrued liabilities and other	18,753	14,124
Debt	16,740	16,873
Reclamation	1,911	1,911
Current liabilities	54,584	52,152
Debt	34,623	36,377
Reclamation	85,328	84,092
Deferred tax liabilities	3,858	3,855
Other long-term liabilities	42,703	4,639
Intercompany payable (receivable)	297,592	303,084
Non-current liabilities	464,104	432,047
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 205,111,221 issued and outstanding at March 31, 2019 and 203,310,443 at December 31, 2018	20,309	19,630
Additional paid-in capital	164,605	164,506
Accumulated deficit	(37,912)	(33,719)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	147,002	150,417
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	665,690	634,616
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	48,360	79,795
Receivables	23,683	18,906
Ore on leach pads	0	0
Inventory	33,690	34,601
Prepaid expenses and other	6,238	5,169
Assets held for sale		0
Current assets	111,971	138,471
Property, plant and equipment, net	119,711	116,544
Mining properties, net	722,204	731,176
Ore on leach pads	0	0
Restricted assets	7,156	7,054
Equity and debt securities	0	0
Receivables	30,271	29,850
Net investment in subsidiaries	161	284
Other	13,463	2,169
TOTAL ASSETS	1,004,937	1,025,548
Accounts payable	32,061	25,785
Accrued liabilities and other	65,905	46,221
Debt	7,780	8,064
Reclamation	4,641	4,641
Current liabilities	110,387	84,711
Debt	307,636	304,886
Reclamation	45,947	44,902
Deferred tax liabilities	64,886	74,997
Other long-term liabilities	31,335	49,613
Intercompany payable (receivable)	22,936	21,930
Non-current liabilities	472,740	496,328
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 205,111,221 issued and outstanding at March 31, 2019 and 203,310,443 at December 31, 2018	214,400	214,400
Additional paid-in capital	2,054,419	2,043,869
Accumulated deficit	(1,847,009)	(1,813,760)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	421,810	444,509
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,004,937	$ 1,025,548