Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 70,924		$ 55,645
Receivables	21,986		18,666
Ore on leach pads	75,111		66,192
Inventory	52,752		55,886
Prepaid expenses and other	18,730		14,047
Current assets	239,503		210,436
Property, plant and equipment, net	234,133		248,789
Mining properties, net	704,580		711,955
Ore on leach pads	78,605		71,539
Restricted assets	8,636		8,752
Equity and debt securities	15,086		35,646
Receivables	22,978		28,709
Net investment in subsidiaries	0		0
Other	57,559		62,810
TOTAL ASSETS	1,361,080		1,378,636
Accounts payable	58,241		69,176
Accrued liabilities and other	68,457		95,616
Debt	27,176		22,746
Reclamation	3,094		3,114
Current liabilities	156,968		190,652
Debt	321,443		272,751
Reclamation	137,715		133,417
Deferred tax liabilities	35,266		41,976
Other long-term liabilities	55,831		72,836
Intercompany payable (receivable)	0		0
Non-current liabilities	550,255		520,980
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,731,885 issued and outstanding at June 30, 2020 and 241,529,021 at December 31, 2019	2,437		2,415
Additional paid-in capital	3,605,982		3,598,472
Accumulated deficit	(2,946,856)		(2,933,747)
Accumulated other comprehensive income (loss)	(7,706)		(136)
Stockholders' equity	653,857	$ 660,644	667,004	$ 846,446	$ 832,335	$ 852,512
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,361,080		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	(423,567)		(325,738)
Other	(244,951)		(277,448)
TOTAL ASSETS	(668,518)		(603,186)
Accounts payable	0		0
Accrued liabilities and other	0		0
Debt	0		0
Reclamation	0		0
Current liabilities	0		0
Debt	(244,951)		(277,448)
Reclamation	0		0
Deferred tax liabilities	0		0
Other long-term liabilities	0		0
Intercompany payable (receivable)	0		0
Non-current liabilities	(244,951)		(277,448)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,731,885 issued and outstanding at June 30, 2020 and 241,529,021 at December 31, 2019	(235,217)		(236,101)
Additional paid-in capital	(2,381,631)		(2,298,162)
Accumulated deficit	2,193,281		2,208,525
Accumulated other comprehensive income (loss)	0		0
Stockholders' equity	(423,567)		(325,738)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(668,518)		(603,186)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	23,317		2,985
Receivables	678		(65)
Ore on leach pads	0		0
Inventory	0		0
Prepaid expenses and other	11,573		6,202
Current assets	35,568		9,122
Property, plant and equipment, net	2,146		2,370
Mining properties, net	(671)		4,452
Ore on leach pads	0		0
Restricted assets	1,477		1,470
Equity and debt securities	15,086		35,646
Receivables	0		0
Net investment in subsidiaries	422,836		325,723
Other	249,101		267,281
TOTAL ASSETS	725,543		646,064
Accounts payable	2,959		1,277
Accrued liabilities and other	21,903		9,036
Debt	0		0
Reclamation	0		0
Current liabilities	24,862		10,313
Debt	287,239		226,885
Reclamation	0		0
Deferred tax liabilities	(2,914)		50
Other long-term liabilities	3,655		4,225
Intercompany payable (receivable)	(241,156)		(262,413)
Non-current liabilities	46,824		(31,253)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,731,885 issued and outstanding at June 30, 2020 and 241,529,021 at December 31, 2019	2,437		2,415
Additional paid-in capital	3,605,982		3,598,472
Accumulated deficit	(2,946,856)		(2,933,747)
Accumulated other comprehensive income (loss)	(7,706)		(136)
Stockholders' equity	653,857		667,004
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	725,543		646,064
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	21,918		27,217
Receivables	5,890		5,978
Ore on leach pads	75,111		66,192
Inventory	26,983		24,763
Prepaid expenses and other	1,365		1,192
Current assets	131,267		125,342
Property, plant and equipment, net	153,331		167,159
Mining properties, net	331,753		327,685
Ore on leach pads	78,605		71,539
Restricted assets	206		206
Equity and debt securities	0		0
Receivables	0		0
Net investment in subsidiaries	78,543		85,755
Other	50,862		52,040
TOTAL ASSETS	824,567		829,726
Accounts payable	34,835		26,211
Accrued liabilities and other	37,463		35,547
Debt	16,962		15,347
Reclamation	1,628		1,628
Current liabilities	90,888		78,733
Debt	31,443		32,989
Reclamation	94,076		91,524
Deferred tax liabilities	8,190		8,104
Other long-term liabilities	34,046		40,012
Intercompany payable (receivable)	222,303		246,186
Non-current liabilities	390,058		418,815
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,731,885 issued and outstanding at June 30, 2020 and 241,529,021 at December 31, 2019	20,401		20,309
Additional paid-in capital	340,700		337,975
Accumulated deficit	(17,480)		(26,106)
Accumulated other comprehensive income (loss)	0		0
Stockholders' equity	343,621		332,178
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	824,567		829,726
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	25,689		25,443
Receivables	15,418		12,753
Ore on leach pads	0		0
Inventory	25,769		31,123
Prepaid expenses and other	5,792		6,653
Current assets	72,668		75,972
Property, plant and equipment, net	78,656		79,260
Mining properties, net	373,498		379,818
Ore on leach pads	0		0
Restricted assets	6,953		7,076
Equity and debt securities	0		0
Receivables	22,978		28,709
Net investment in subsidiaries	(77,812)		(85,740)
Other	2,547		20,937
TOTAL ASSETS	479,488		506,032
Accounts payable	20,447		41,688
Accrued liabilities and other	9,091		51,033
Debt	10,214		7,399
Reclamation	1,466		1,486
Current liabilities	41,218		101,606
Debt	247,712		290,325
Reclamation	43,639		41,893
Deferred tax liabilities	29,990		33,822
Other long-term liabilities	18,130		28,599
Intercompany payable (receivable)	18,853		16,227
Non-current liabilities	358,324		410,866
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,731,885 issued and outstanding at June 30, 2020 and 241,529,021 at December 31, 2019	214,816		215,792
Additional paid-in capital	2,040,931		1,960,187
Accumulated deficit	(2,175,801)		(2,182,419)
Accumulated other comprehensive income (loss)	0		0
Stockholders' equity	79,946		(6,440)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 479,488		$ 506,032