Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 37,907		$ 115,081
Receivables	38,495		29,744
Ore on leach pads	72,310		75,122
Inventory	59,048		66,279
Prepaid expenses and other	12,066		11,393
Assets held for sale			0
Current assets	219,826		297,619
Property, plant and equipment, net	298,926		298,451
Mining properties, net	945,839		971,567
Ore on leach pads	76,910		66,964
Restricted assets	8,730		12,133
Equity and debt securities	19,457		17,806
Receivables	31,871		31,151
Net investment in subsidiaries	0		0
Other	75,671		16,809
TOTAL ASSETS	1,677,230		1,712,500
Accounts payable	65,676		47,210
Accrued liabilities and other	116,187		82,619
Debt	21,772		24,937
Reclamation	6,552		6,552
Current liabilities	210,187		161,318
Debt	348,205		433,889
Reclamation	133,127		128,994
Deferred tax liabilities	61,653		79,070
Other long-term liabilities	77,612		56,717
Intercompany payable (receivable)	0		0
Non-current liabilities	620,597		698,670
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 221,858,660 issued and outstanding at June 30, 2019 and 203,310,443 at December 31, 2018	2,219		2,033
Additional paid-in capital	3,492,736		3,443,082
Accumulated deficit	(2,648,509)		(2,592,544)
Accumulated other comprehensive income (loss)	0		(59)
Stockholders' equity	846,446	$ 832,335	852,512	$ 818,771	$ 814,311	$ 814,977
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,677,230		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	(540,502)		(594,925)
Other	(293,468)		(288,228)
TOTAL ASSETS	(833,970)		(883,153)
Accounts payable	0		0
Accrued liabilities and other	0		0
Debt	0		0
Reclamation	0		0
Current liabilities	0		0
Debt	(293,468)		(288,228)
Reclamation	0		0
Deferred tax liabilities	0		0
Other long-term liabilities	0		0
Intercompany payable (receivable)	0		0
Non-current liabilities	(293,468)		(288,228)
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 221,858,660 issued and outstanding at June 30, 2019 and 203,310,443 at December 31, 2018	(234,709)		(234,030)
Additional paid-in capital	(2,228,359)		(2,208,375)
Accumulated deficit	1,922,566		1,847,480
Accumulated other comprehensive income (loss)	0		0
Stockholders' equity	(540,502)		(594,925)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	(833,970)		(883,153)
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	2,687		9,768
Receivables	(55)		5,333
Ore on leach pads	0		0
Inventory	0		0
Prepaid expenses and other	4,726		4,378
Assets held for sale			0
Current assets	7,358		19,479
Property, plant and equipment, net	2,424		2,755
Mining properties, net	4,753		4,753
Ore on leach pads	0		0
Restricted assets	1,462		4,872
Equity and debt securities	19,457		17,797
Receivables	0		0
Net investment in subsidiaries	540,528		594,584
Other	299,315		291,249
TOTAL ASSETS	875,297		935,489
Accounts payable	2,692		2,181
Accrued liabilities and other	4,846		22,274
Debt	0		0
Reclamation	0		0
Current liabilities	7,538		24,455
Debt	299,237		380,854
Reclamation	0		0
Deferred tax liabilities	2,374		218
Other long-term liabilities	4,624		2,465
Intercompany payable (receivable)	(284,921)		(325,014)
Non-current liabilities	21,314		58,523
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 221,858,660 issued and outstanding at June 30, 2019 and 203,310,443 at December 31, 2018	2,219		2,033
Additional paid-in capital	3,492,736		3,443,082
Accumulated deficit	(2,648,510)		(2,592,545)
Accumulated other comprehensive income (loss)	0		(59)
Stockholders' equity	846,445		852,511
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	875,297		935,489
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	9,334		25,518
Receivables	8,426		5,505
Ore on leach pads	72,310		75,122
Inventory	26,853		31,678
Prepaid expenses and other	1,158		1,846
Assets held for sale			0
Current assets	118,081		139,669
Property, plant and equipment, net	175,694		179,152
Mining properties, net	230,515		235,638
Ore on leach pads	76,910		66,964
Restricted assets	206		207
Equity and debt securities	0		9
Receivables	1,300		1,301
Net investment in subsidiaries	161		57
Other	56,935		11,619
TOTAL ASSETS	659,802		634,616
Accounts payable	23,691		19,244
Accrued liabilities and other	43,692		14,124
Debt	14,637		16,873
Reclamation	1,911		1,911
Current liabilities	83,931		52,152
Debt	33,176		36,377
Reclamation	86,112		84,092
Deferred tax liabilities	3,857		3,855
Other long-term liabilities	42,348		4,639
Intercompany payable (receivable)	266,253		303,084
Non-current liabilities	431,746		432,047
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 221,858,660 issued and outstanding at June 30, 2019 and 203,310,443 at December 31, 2018	20,309		19,630
Additional paid-in capital	165,108		164,506
Accumulated deficit	(41,292)		(33,719)
Accumulated other comprehensive income (loss)	0		0
Stockholders' equity	144,125		150,417
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	659,802		634,616
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	25,886		79,795
Receivables	30,124		18,906
Ore on leach pads	0		0
Inventory	32,195		34,601
Prepaid expenses and other	6,182		5,169
Assets held for sale			0
Current assets	94,387		138,471
Property, plant and equipment, net	120,808		116,544
Mining properties, net	710,571		731,176
Ore on leach pads	0		0
Restricted assets	7,062		7,054
Equity and debt securities	0		0
Receivables	30,571		29,850
Net investment in subsidiaries	(187)		284
Other	12,889		2,169
TOTAL ASSETS	976,101		1,025,548
Accounts payable	39,293		25,785
Accrued liabilities and other	67,649		46,221
Debt	7,135		8,064
Reclamation	4,641		4,641
Current liabilities	118,718		84,711
Debt	309,260		304,886
Reclamation	47,015		44,902
Deferred tax liabilities	55,422		74,997
Other long-term liabilities	30,640		49,613
Intercompany payable (receivable)	18,668		21,930
Non-current liabilities	461,005		496,328
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 221,858,660 issued and outstanding at June 30, 2019 and 203,310,443 at December 31, 2018	214,400		214,400
Additional paid-in capital	2,063,251		2,043,869
Accumulated deficit	(1,881,273)		(1,813,760)
Accumulated other comprehensive income (loss)	0		0
Stockholders' equity	396,378		444,509
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 976,101		$ 1,025,548