Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations		$ 5,789	$ 37,309	$ 20,036	$ 105,349
Cash provided by (used in) activities of discontinued operations		0	(7,877)	(2,690)	8,633
Cash provided by (used in) operating activities		5,789	29,432	17,346	113,982
Capital expenditures		(39,472)	(28,982)	(122,982)	(89,680)
Proceeds from the sale of assets		393	1,016	549	16,471
Purchase of investments		(15)	(3,595)	(415)	(13,559)
Sales of investments		(78)	403	12,682	11,321
Proceeds from Collection of Notes Receivable		15,000	0	15,000	0
Other		64	(4,319)	(34)	(4,385)
Investments in consolidated subsidiaries			0	0	0
Cash provided by (used in) activities of continuing operations		(24,108)	(35,477)	(95,200)	(79,832)
Cash provided by (used in) activities of discontinued operations		0	(412)	(28,470)	(1,175)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(24,108)	(35,889)	(123,670)	(81,007)
Issuance of notes and bank borrowings, net of issuance costs		25,000	(2,257)	40,000	242,701
Payments on debt, capital leases, and associated costs		(25,533)	(3,323)	(48,355)	(195,439)
Net intercompany financing activity			0	0	0
Other		(77)	(6)	(4,916)	(3,726)
Cash provided by (used in) activities of continuing operations		(610)	(5,586)	(13,271)	43,536
Cash provided by (used in) activities of discontinued operations		0	(21)	(22)	(62)
Cash provided by (used in) activities of discontinued operations		(610)	(5,607)	(13,293)	43,474
Effect of exchange rate changes on cash and cash equivalents		183	(222)	565	662
Less net cash provided by (used in) discontinued operations	[1]	0	(8,491)	(32,930)	(3,302)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(18,746)	(3,795)	(86,122)	80,413
Cash, cash equivalents and restricted cash at beginning of period		136,026	210,809	203,402	126,601
Cash, cash equivalents and restricted cash at end of period		117,280	207,014	117,280	207,014
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations		24,343	1,236	5,625	(20,361)
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Cash provided by (used in) operating activities		24,343	1,236	5,625	(20,361)
Capital expenditures		0	0	0	0
Proceeds from the sale of assets		0	0	0	0
Purchase of investments		0	0	0	0
Sales of investments		0	0	0	0
Proceeds from Collection of Notes Receivable		0		0
Other		0	0	0	0
Investments in consolidated subsidiaries		(24,343)	(1,236)	(5,625)	20,361
Cash provided by (used in) activities of continuing operations		(24,343)	(1,236)	(5,625)	20,361
Cash provided by (used in) activities of discontinued operations		0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(24,343)	(1,236)	(5,625)	20,361
Issuance of notes and bank borrowings, net of issuance costs		0	0	0	0
Payments on debt, capital leases, and associated costs		0	0	0	0
Net intercompany financing activity		0	0	0	0
Other		0	0	0	0
Cash provided by (used in) activities of continuing operations		0	0	0	0
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Effect of exchange rate changes on cash and cash equivalents		0	0	0	0
Less net cash provided by (used in) discontinued operations		0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		0	0	0	0
Cash, cash equivalents and restricted cash at beginning of period		0	0	0	0
Cash, cash equivalents and restricted cash at end of period		0	0	0	0
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations		(37,112)	(8,682)	(36,687)	(18,502)
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Cash provided by (used in) operating activities		(37,112)	(8,682)	(36,687)	(18,502)
Capital expenditures		(119)	318	(303)	1,626
Proceeds from the sale of assets		0	0	23	8,917
Purchase of investments		(15)	3,594	(415)	13,558
Sales of investments		(126)	0	11,694	(9,157)
Proceeds from Collection of Notes Receivable		15,000		15,000
Other		124	4,252	45	4,197
Investments in consolidated subsidiaries		24,121	(3,432)	4,922	9,572
Cash provided by (used in) activities of continuing operations		38,985	(4,732)	30,966	(10,879)
Cash provided by (used in) activities of discontinued operations		0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		38,985	(4,732)	30,966	(10,879)
Issuance of notes and bank borrowings, net of issuance costs		25,000	(2,257)	40,000	242,701
Payments on debt, capital leases, and associated costs		(20,000)	0	(20,000)	185,538
Net intercompany financing activity		(7,130)	(9,266)	(41,498)	(16,904)
Other		(77)	(6)	(4,916)	(3,726)
Cash provided by (used in) activities of continuing operations		(2,207)	7,003	(26,414)	70,341
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Cash provided by (used in) activities of discontinued operations		(2,207)	7,003	(26,414)	70,341
Effect of exchange rate changes on cash and cash equivalents		0	0	0	0
Less net cash provided by (used in) discontinued operations		0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(334)	(6,411)	(32,135)	40,960
Cash, cash equivalents and restricted cash at beginning of period		24,232	113,708	56,033	66,337
Cash, cash equivalents and restricted cash at end of period		23,898	107,297	23,898	107,297
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations		7,058	27,407	33,173	59,434
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Cash provided by (used in) operating activities		7,058	27,407	33,173	59,434
Capital expenditures		(16,720)	23,016	(43,598)	63,928
Proceeds from the sale of assets		304	76	437	6,670
Purchase of investments		0	1	0	1
Sales of investments		48	(403)	988	(2,164)
Proceeds from Collection of Notes Receivable		0		0
Other		0	0	109	0
Investments in consolidated subsidiaries		56	(7,144)	121	(7,897)
Cash provided by (used in) activities of continuing operations		(16,312)	(15,394)	(41,943)	(47,198)
Cash provided by (used in) activities of discontinued operations		0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(16,312)	(15,394)	(41,943)	(47,198)
Issuance of notes and bank borrowings, net of issuance costs		0	0	0	0
Payments on debt, capital leases, and associated costs		(3,535)	1,894	(8,462)	5,789
Net intercompany financing activity		(4,844)	12,370	(12,436)	10,809
Other			0	0	0
Cash provided by (used in) activities of continuing operations		(8,379)	(14,264)	(20,898)	(16,598)
Cash provided by (used in) activities of discontinued operations		0	0	0	0
Cash provided by (used in) activities of discontinued operations		(8,379)	(14,264)	(20,898)	(16,598)
Effect of exchange rate changes on cash and cash equivalents		(2)	3	(6)	3
Less net cash provided by (used in) discontinued operations		0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(17,635)	(2,248)	(29,674)	(4,359)
Cash, cash equivalents and restricted cash at beginning of period		40,200	47,912	52,239	50,023
Cash, cash equivalents and restricted cash at end of period		22,565	45,664	22,565	45,664
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations		11,500	17,348	17,925	84,778
Cash provided by (used in) activities of discontinued operations		0	(7,877)	(2,690)	8,633
Cash provided by (used in) operating activities		11,500	9,471	15,235	93,411
Capital expenditures		(22,633)	5,648	(79,081)	24,126
Proceeds from the sale of assets		89	940	89	884
Purchase of investments		0	0	0	0
Sales of investments		0	0	0	0
Proceeds from Collection of Notes Receivable		0		0
Other		(60)	67	(188)	188
Investments in consolidated subsidiaries		166	9,340	582	18,686
Cash provided by (used in) activities of continuing operations		(22,438)	(14,115)	(78,598)	(42,116)
Cash provided by (used in) activities of discontinued operations		0	(412)	(28,470)	(1,175)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(22,438)	(14,527)	(107,068)	(43,291)
Issuance of notes and bank borrowings, net of issuance costs		0	0	0	0
Payments on debt, capital leases, and associated costs		(1,998)	1,429	(19,893)	4,112
Net intercompany financing activity		11,974	(3,104)	53,934	6,095
Other			0	0	0
Cash provided by (used in) activities of continuing operations		9,976	1,675	34,041	(10,207)
Cash provided by (used in) activities of discontinued operations		0	(21)	(22)	(62)
Cash provided by (used in) activities of discontinued operations		9,976	1,654	34,019	(10,269)
Effect of exchange rate changes on cash and cash equivalents		185	(225)	571	659
Less net cash provided by (used in) discontinued operations		0	(8,491)	(32,930)	(3,302)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(777)	4,864	(24,313)	43,812
Cash, cash equivalents and restricted cash at beginning of period		71,594	49,189	95,130	10,241
Cash, cash equivalents and restricted cash at end of period		$ 70,817	$ 54,053	$ 70,817	$ 54,053

[1] Less net cash provided by (used in) discontinued operations includes the following cash transactions: net subsidiary payments to parent company of $181 for the three months ended September 30, 2017 and $1,748 and $10,698 during the nine months ended September 30, 2018 and 2017, respectively.