Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 52,895	$ 55,645
Receivables	19,722	18,666
Ore on leach pads	83,035	66,192
Inventory	51,857	55,886
Prepaid expenses and other	14,150	14,047
Current assets	221,659	210,436
Property, plant and equipment, net	242,018	248,789
Mining properties, net	702,960	711,955
Ore on leach pads	66,703	71,539
Restricted assets	8,123	8,752
Equity and debt securities	26,826	35,646
Receivables	23,149	28,709
Net investment in subsidiaries	0	0
Other	57,659	62,810
TOTAL ASSETS	1,349,097	1,378,636
Accounts payable	61,519	69,176
Accrued liabilities and other	49,935	95,616
Debt	23,588	22,746
Reclamation	3,094	3,114
Current liabilities	138,136	190,652
Debt	319,521	272,751
Reclamation	135,436	133,417
Deferred tax liabilities	36,472	41,976
Other long-term liabilities	58,888	72,836
Intercompany payable (receivable)	0	0
Non-current liabilities	550,317	520,980
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,586,226 issued and outstanding at March 31, 2020 and 241,529,021 at December 31, 2019	2,436	2,415
Additional paid-in capital	3,603,785	3,598,472
Accumulated deficit	(2,945,647)	(2,933,747)
Accumulated other comprehensive income (loss)	70	(136)
Stockholders' equity	660,644	667,004	$ 832,335	$ 852,512
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,349,097	1,378,636
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	(403,016)	(325,738)
Other	(238,523)	(277,448)
TOTAL ASSETS	(641,539)	(603,186)
Accounts payable	0	0
Accrued liabilities and other	0	0
Debt	0	0
Reclamation	0	0
Current liabilities	0	0
Debt	(238,523)	(277,448)
Reclamation	0	0
Deferred tax liabilities	0	0
Other long-term liabilities	0	0
Intercompany payable (receivable)	0	0
Non-current liabilities	(238,523)	(277,448)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,586,226 issued and outstanding at March 31, 2020 and 241,529,021 at December 31, 2019	(235,217)	(236,101)
Additional paid-in capital	(2,356,559)	(2,298,162)
Accumulated deficit	2,188,760	2,208,525
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	(403,016)	(325,738)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(641,539)	(603,186)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	7,594	2,985
Receivables	0	(65)
Ore on leach pads	0	0
Inventory	0	0
Prepaid expenses and other	6,649	6,202
Current assets	14,243	9,122
Property, plant and equipment, net	2,176	2,370
Mining properties, net	0	4,452
Ore on leach pads	0	0
Restricted assets	1,468	1,470
Equity and debt securities	26,826	35,646
Receivables	0	0
Net investment in subsidiaries	403,171	325,723
Other	243,008	267,281
TOTAL ASSETS	690,892	646,064
Accounts payable	2,070	1,277
Accrued liabilities and other	9,327	9,036
Debt	0	0
Reclamation	0	0
Current liabilities	11,397	10,313
Debt	277,062	226,885
Reclamation	0	0
Deferred tax liabilities	366	50
Other long-term liabilities	3,826	4,225
Intercompany payable (receivable)	(262,403)	(262,413)
Non-current liabilities	18,851	(31,253)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,586,226 issued and outstanding at March 31, 2020 and 241,529,021 at December 31, 2019	2,436	2,415
Additional paid-in capital	3,603,785	3,598,472
Accumulated deficit	(2,945,647)	(2,933,747)
Accumulated other comprehensive income (loss)	70	(136)
Stockholders' equity	660,644	667,004
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	690,892	646,064
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	16,832	27,217
Receivables	7,014	5,978
Ore on leach pads	83,035	66,192
Inventory	24,729	24,763
Prepaid expenses and other	1,080	1,192
Current assets	132,690	125,342
Property, plant and equipment, net	160,632	167,159
Mining properties, net	327,587	327,685
Ore on leach pads	66,703	71,539
Restricted assets	206	206
Equity and debt securities	0	0
Receivables	0	0
Net investment in subsidiaries	82,558	85,755
Other	50,552	52,040
TOTAL ASSETS	820,928	829,726
Accounts payable	26,138	26,211
Accrued liabilities and other	27,031	35,547
Debt	15,469	15,347
Reclamation	1,628	1,628
Current liabilities	70,266	78,733
Debt	32,596	32,989
Reclamation	92,665	91,524
Deferred tax liabilities	8,190	8,104
Other long-term liabilities	37,117	40,012
Intercompany payable (receivable)	244,608	246,186
Non-current liabilities	415,176	418,815
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,586,226 issued and outstanding at March 31, 2020 and 241,529,021 at December 31, 2019	20,401	20,309
Additional paid-in capital	338,479	337,975
Accumulated deficit	(23,394)	(26,106)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	335,486	332,178
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	820,928	829,726
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	28,469	25,443
Receivables	12,708	12,753
Ore on leach pads	0	0
Inventory	27,128	31,123
Prepaid expenses and other	6,421	6,653
Current assets	74,726	75,972
Property, plant and equipment, net	79,210	79,260
Mining properties, net	375,373	379,818
Ore on leach pads	0	0
Restricted assets	6,449	7,076
Equity and debt securities	0	0
Receivables	23,149	28,709
Net investment in subsidiaries	(82,713)	(85,740)
Other	2,622	20,937
TOTAL ASSETS	478,816	506,032
Accounts payable	33,311	41,688
Accrued liabilities and other	13,577	51,033
Debt	8,119	7,399
Reclamation	1,466	1,486
Current liabilities	56,473	101,606
Debt	248,386	290,325
Reclamation	42,771	41,893
Deferred tax liabilities	27,916	33,822
Other long-term liabilities	17,945	28,599
Intercompany payable (receivable)	17,795	16,227
Non-current liabilities	354,813	410,866
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,586,226 issued and outstanding at March 31, 2020 and 241,529,021 at December 31, 2019	214,816	215,792
Additional paid-in capital	2,018,080	1,960,187
Accumulated deficit	(2,165,366)	(2,182,419)
Accumulated other comprehensive income (loss)	0	0
Stockholders' equity	67,530	(6,440)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 478,816	$ 506,032