Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 55,645	$ 115,081
Receivables	18,666	29,744
Ore on leach pads	66,192	75,122
Inventory	55,886	66,279
Prepaid expenses and other	14,047	11,393
Current assets	210,436	297,619
Property, plant and equipment, net	248,789	298,451
Mining properties, net	711,955	971,567
Ore on leach pads	71,539	66,964
Restricted assets	8,752	12,133
Equity and debt securities	35,646	17,806
Receivables	28,709	31,151
Net investment in subsidiaries	0	0
Other	62,810	16,809
TOTAL ASSETS	1,378,636	1,712,500
Accounts payable	69,176	47,210
Accrued liabilities and other	95,616	82,619
Debt	22,746	24,937
Reclamation	3,114	6,552
Current liabilities	190,652	161,318
Debt	272,751	433,889
Reclamation	133,417	128,994
Deferred tax liabilities	41,976	79,070
Other long-term liabilities	72,836	56,717
Intercompany payable (receivable)	0	0
Non-current liabilities	520,980	698,670
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 241,529,021 issued and outstanding at December 31, 2019 and 203,310,443 at December 31, 2018	2,415	2,033
Additional paid-in capital	3,598,472	3,443,082
Accumulated deficit	(2,933,747)	(2,592,544)
Accumulated other comprehensive income (loss)	(136)	(59)
Stockholders' equity	667,004	852,512	$ 814,977	$ 768,487
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,378,636	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
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	(325,738)	(594,925)
Other	(277,448)	(288,228)
TOTAL ASSETS	(603,186)	(883,153)
Accounts payable	0	0
Accrued liabilities and other	0	0
Debt	0	0
Reclamation	0	0
Current liabilities	0	0
Debt	(277,448)	(288,228)
Reclamation	0	0
Deferred tax liabilities	0	0
Other long-term liabilities	0	0
Intercompany payable (receivable)	0	0
Non-current liabilities	(277,448)	(288,228)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 241,529,021 issued and outstanding at December 31, 2019 and 203,310,443 at December 31, 2018	(236,101)	(234,030)
Additional paid-in capital	(2,298,162)	(2,208,375)
Accumulated deficit	2,208,525	1,847,480
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	(325,738)	(594,925)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(603,186)	(883,153)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	2,985	9,768
Receivables	(65)	5,333
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	6,202	4,378
Current assets	9,122	19,479
Property, plant and equipment, net	2,370	2,755
Mining properties, net	4,452	4,753
Ore on leach pads	0	0
Restricted assets	1,470	4,872
Equity and debt securities	35,646	17,797
Receivables	0	0
Net investment in subsidiaries	325,723	594,584
Other	267,281	291,249
TOTAL ASSETS	646,064	935,489
Accounts payable	1,277	2,181
Accrued liabilities and other	9,036	22,274
Debt	0	0
Reclamation	0	0
Current liabilities	10,313	24,455
Debt	226,885	380,854
Reclamation	0	0
Deferred tax liabilities	50	218
Other long-term liabilities	4,225	2,465
Intercompany payable (receivable)	(262,413)	(325,014)
Non-current liabilities	(31,253)	58,523
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 241,529,021 issued and outstanding at December 31, 2019 and 203,310,443 at December 31, 2018	2,415	2,033
Additional paid-in capital	3,598,472	3,443,082
Accumulated deficit	(2,933,747)	(2,592,545)
Accumulated other comprehensive income (loss)	(136)	(59)
Stockholders' equity	667,004	852,511
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	646,064	935,489
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	27,217	25,518
Receivables	5,978	5,505
Ore on leach pads	66,192	75,122
Inventory	24,763	31,678
Prepaid expenses and other	1,192	1,846
Current assets	125,342	139,669
Property, plant and equipment, net	167,159	179,152
Mining properties, net	327,685	235,638
Ore on leach pads	71,539	66,964
Restricted assets	206	207
Equity and debt securities	0	9
Receivables	0	1,301
Net investment in subsidiaries	85,755	57
Other	52,040	11,619
TOTAL ASSETS	829,726	634,616
Accounts payable	26,211	19,244
Accrued liabilities and other	35,547	14,124
Debt	15,347	16,873
Reclamation	1,628	1,911
Current liabilities	78,733	52,152
Debt	32,989	36,377
Reclamation	91,524	84,092
Deferred tax liabilities	8,104	3,855
Other long-term liabilities	40,012	4,639
Intercompany payable (receivable)	246,186	303,084
Non-current liabilities	418,815	432,047
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 241,529,021 issued and outstanding at December 31, 2019 and 203,310,443 at December 31, 2018	20,309	19,630
Additional paid-in capital	337,975	164,506
Accumulated deficit	(26,106)	(33,719)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	332,178	150,417
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	829,726	634,616
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	25,443	79,795
Receivables	12,753	18,906
Ore on leach pads	0	0
Inventory	31,123	34,601
Prepaid expenses and other	6,653	5,169
Current assets	75,972	138,471
Property, plant and equipment, net	79,260	116,544
Mining properties, net	379,818	731,176
Ore on leach pads	0	0
Restricted assets	7,076	7,054
Equity and debt securities	0	0
Receivables	28,709	29,850
Net investment in subsidiaries	(85,740)	284
Other	20,937	2,169
TOTAL ASSETS	506,032	1,025,548
Accounts payable	41,688	25,785
Accrued liabilities and other	51,033	46,221
Debt	7,399	8,064
Reclamation	1,486	4,641
Current liabilities	101,606	84,711
Debt	290,325	304,886
Reclamation	41,893	44,902
Deferred tax liabilities	33,822	74,997
Other long-term liabilities	28,599	49,613
Intercompany payable (receivable)	16,227	21,930
Non-current liabilities	410,866	496,328
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 241,529,021 issued and outstanding at December 31, 2019 and 203,310,443 at December 31, 2018	215,792	214,400
Additional paid-in capital	1,960,187	2,043,869
Accumulated deficit	(2,182,419)	(1,813,760)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	(6,440)	444,509
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 506,032	$ 1,025,548