Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	$ 79,464	$ 41,996	$ 81,420	$ 52,585
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	79,464	41,996	81,420	52,585
Capital expenditures	(22,996)	(30,678)	(61,886)	(78,865)
Proceeds from the sale of assets	730	26	5,245	930
Purchase of investments	(2,500)	0	(2,500)	0
Proceeds from Collection of Notes Receivable	0	0	0	7,168
Other	(25)	(57)	(225)	1,961
Investments in consolidated subsidiaries	0	0	0	0
Cash provided by (used in) activities of continuing operations	(24,791)	(29,702)	(39,564)	(66,697)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(24,791)	(29,702)	(39,564)	(66,697)
Proceeds from Issuance of Common Stock	0	73,781	0	122,668
Issuance of notes and bank borrowings, net of issuance costs	0	30,000	150,000	45,000
Payments on debt, capital leases, and associated costs	(48,557)	(87,778)	(150,171)	(201,051)
Payment for Contingent Consideration Liability, Financing Activities	0	0	(18,750)	0
Net intercompany financing activity	0	0	0	0
Other	114	301	(1,718)	(2,958)
Cash provided by (used in) activities of continuing operations	(48,443)	16,304	(20,639)	(36,341)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	(48,443)	16,304	(20,639)	(36,341)
Effect of exchange rate changes on cash and cash equivalents	(10)	(192)	293	65
Less net cash provided by (used in) discontinued operations	0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	6,220	28,406	21,510	(50,388)
Cash, cash equivalents and restricted cash at beginning of period	72,308	39,275	57,018	118,069
Cash, cash equivalents and restricted cash at end of period	78,528	67,681	78,528	67,681
Sale of investments	0	1,007	19,802	2,109
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	(41,416)	11,280		56,479
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	(41,416)	11,280	(42,814)	56,479
Capital expenditures	0	0	0	0
Proceeds from the sale of assets	0	0	0	0
Purchase of investments	0	0	0	0
Proceeds from Collection of Notes Receivable	0	0	0	0
Other	0	0	0	0
Investments in consolidated subsidiaries	41,416	(11,280)	42,814	(56,479)
Cash provided by (used in) activities of continuing operations	41,416	(11,280)		(56,479)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(11,280)	42,814	(56,479)
Proceeds from Issuance of Common Stock		0		0
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
Payment for Contingent Consideration Liability, Financing Activities	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
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
Sale of investments	0	0	0	0
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	30,905	(18,772)		(96,935)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	30,905	(18,772)	12,764	(96,935)
Capital expenditures	(74)	(239)	(251)	(349)
Proceeds from the sale of assets	0	0	4,500	0
Purchase of investments	(2,500)	0	(2,500)	0
Proceeds from Collection of Notes Receivable	0	0	0	7,168
Other	0	2	0	2,034
Investments in consolidated subsidiaries	(41,410)	11,372	(43,008)	56,112
Cash provided by (used in) activities of continuing operations	(43,984)	12,142		67,074
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		12,142	(21,457)	67,074
Proceeds from Issuance of Common Stock		73,781		122,668
Issuance of notes and bank borrowings, net of issuance costs	0	30,000	150,000	45,000
Payments on debt, capital leases, and associated costs	(40,000)	(83,034)	(130,000)	(180,841)
Payment for Contingent Consideration Liability, Financing Activities	0		0
Net intercompany financing activity	43,347	(6,842)	1,131	44,863
Other	114	301	(1,718)	(2,958)
Cash provided by (used in) activities of continuing operations		14,206	19,413	28,732
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	3,461	14,206	19,413	28,732
Effect of exchange rate changes on cash and cash equivalents	0	0	3	0
Less net cash provided by (used in) discontinued operations	0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(9,618)	7,576	10,723	(1,129)
Cash, cash equivalents and restricted cash at beginning of period	27,016	4,043	6,675	12,748
Cash, cash equivalents and restricted cash at end of period	17,398	11,619	17,398	11,619
Sale of investments	0	1,007	19,802	2,109
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	48,535	24,553		76,116
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	48,535	24,553	88,894	76,116
Capital expenditures	(15,859)	(16,748)	(36,394)	(38,999)
Proceeds from the sale of assets	730	26	745	836
Purchase of investments	0	0	0	0
Proceeds from Collection of Notes Receivable	0	0	0	0
Other	0	(44)	0	69
Investments in consolidated subsidiaries	0	45	(38)	130
Cash provided by (used in) activities of continuing operations	(15,129)	(16,721)		(37,964)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(16,721)	(35,687)	(37,964)
Proceeds from Issuance of Common Stock		0		0
Issuance of notes and bank borrowings, net of issuance costs	0	0	0	0
Payments on debt, capital leases, and associated costs	(4,009)	(3,305)	(11,658)	(13,445)
Payment for Contingent Consideration Liability, Financing Activities	0		0
Net intercompany financing activity	(38,968)	(12,322)	(56,439)	(48,628)
Other	0	0	0	0
Cash provided by (used in) activities of continuing operations		(15,627)	(68,097)	(62,073)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	(42,977)	(15,627)	(68,097)	(62,073)
Effect of exchange rate changes on cash and cash equivalents	6	74	(29)	76
Less net cash provided by (used in) discontinued operations	0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(9,565)	(7,721)	(14,919)	(23,845)
Cash, cash equivalents and restricted cash at beginning of period	21,884	16,669	27,238	32,793
Cash, cash equivalents and restricted cash at end of period	12,319	8,948	12,319	8,948
Sale of investments	0	0	0	0
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	41,440	24,935		16,925
Cash provided by (used in) activities of discontinued operations	0	0		0
Cash provided by (used in) operating activities	41,440	24,935	22,576	16,925
Capital expenditures	(7,063)	(13,691)	(25,241)	(39,517)
Proceeds from the sale of assets	0	0	0	94
Purchase of investments	0	0	0	0
Proceeds from Collection of Notes Receivable	0	0	0	0
Other	(25)	(15)	(225)	(142)
Investments in consolidated subsidiaries	(6)	(137)	232	237
Cash provided by (used in) activities of continuing operations	(7,094)	(13,843)		(39,328)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES		(13,843)	(25,234)	(39,328)
Proceeds from Issuance of Common Stock		0		0
Issuance of notes and bank borrowings, net of issuance costs	0	0	0	0
Payments on debt, capital leases, and associated costs	(4,548)	(1,439)	(8,513)	(6,765)
Payment for Contingent Consideration Liability, Financing Activities	0		(18,750)
Net intercompany financing activity	(4,379)	19,164	55,308	3,765
Other	0	0	0	0
Cash provided by (used in) activities of continuing operations		17,725	28,045	(3,000)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	(8,927)	17,725	28,045	(3,000)
Effect of exchange rate changes on cash and cash equivalents	(16)	(266)	319	(11)
Less net cash provided by (used in) discontinued operations	0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	25,403	28,551	25,706	(25,414)
Cash, cash equivalents and restricted cash at beginning of period	23,408	18,563	23,105	72,528
Cash, cash equivalents and restricted cash at end of period	48,811	47,114	48,811	47,114
Sale of investments	$ 0	$ 0	$ 0	$ 0