Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations									$ 148,709	$ 91,880	$ 20,108
Cash provided by (used in) activities of discontinued operations									0	0	(2,690)
Cash provided by (used in) operating activities	$ 67,289	$ 79,464	$ 9,947	$ (7,991)	$ 39,295	$ 41,996	$ 26,435	$ (15,846)	148,709	91,880	17,418
Capital expenditures	(37,393)	$ (22,996)	$ (16,682)	(22,208)	(20,907)	$ (30,678)	$ (20,749)	(27,438)	(99,279)	(99,772)	(140,787)
Proceeds from the sale of assets									5,529	1,033	577
Purchase of investments									(2,500)	(5,023)	(426)
Sale of investments									30,831	2,109	12,713
Payments to Acquire Businesses, Net of Cash Acquired									0	0	(6,914)
Proceeds from notes receivable									0	7,168	19,000
Other									(252)	1,919	11
Investments in consolidated subsidiaries									0	0	0
Cash provided by (used in) activities of continuing operations									(65,671)	(92,566)	(101,998)
Cash provided by (used in) activities of discontinued operations									0	0	(28,470)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES									(65,671)	(92,566)	(130,468)
Proceeds from Issuance of Common Stock									0	123,059	0
Issuance of notes and bank borrowings, net of issuance costs									150,000	60,000	95,000
Payments on debt, capital leases, and associated costs									(175,984)	(221,854)	(95,059)
Payment for Contingent Consideration Liability, Financing Activities									(18,750)	(18,697)	0
Net intercompany financing activity									0	0	0
Other									(1,801)	(3,404)	(5,160)
Cash provided by (used in) activities of continuing operations									(46,535)	(60,896)	(5,219)
Cash provided by (used in) activities of discontinued operations									0	0	(22)
Cash provided by (used in) activities of discontinued operations									(46,535)	(60,896)	(5,241)
Effect of exchange rate changes on cash and cash equivalents									649	531	28
Less net cash provided by (used in) discontinued operations									0	0	(32,930)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH									37,152	(61,051)	(85,333)
Cash, cash equivalents and restricted cash at beginning of period				57,018				118,069	57,018	118,069	203,402
Cash, cash equivalents and restricted cash at end of period	94,170				57,018				94,170	57,018	118,069
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										324,068	(2,911)
Cash provided by (used in) activities of discontinued operations									0	0	0
Cash provided by (used in) operating activities									(60,313)	324,068	(2,911)
Capital expenditures									0	0	0
Proceeds from the sale of assets									0	0	0
Purchase of investments									0	0	0
Sale of investments									0	0	0
Payments to Acquire Businesses, Net of Cash Acquired											0
Proceeds from notes receivable										0	0
Other									0	0	0
Investments in consolidated subsidiaries									60,313	(324,068)	2,911
Cash provided by (used in) activities of continuing operations											2,911
Cash provided by (used in) activities of discontinued operations									0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES									60,313	(324,068)	2,911
Proceeds from Issuance of Common Stock										0
Issuance of notes and bank borrowings, net of issuance costs									0	0	0
Payments on debt, capital leases, and associated costs									0	0	0
Payment for Contingent Consideration Liability, Financing Activities									0	0
Net intercompany financing activity									0	0	0
Other									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
Cash provided by (used in) activities of discontinued operations									0	0	0
Effect of exchange rate changes on cash and cash equivalents									0	0	0
Less net cash provided by (used in) discontinued operations									0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH									0	0	0
Cash, cash equivalents and restricted cash at beginning of period				0				0	0	0	0
Cash, cash equivalents and restricted cash at end of period	0				0				0	0	0
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										(377,159)	(45,313)
Cash provided by (used in) activities of discontinued operations									0	0	0
Cash provided by (used in) operating activities									16,926	(377,159)	(45,313)
Capital expenditures									(317)	(491)	(390)
Proceeds from the sale of assets									4,500	0	23
Purchase of investments									(2,500)	(5,019)	(431)
Sale of investments									30,831	2,109	11,694
Payments to Acquire Businesses, Net of Cash Acquired											0
Proceeds from notes receivable										7,168	19,000
Other									0	2,051	46
Investments in consolidated subsidiaries									(60,888)	323,561	(6,288)
Cash provided by (used in) activities of continuing operations											23,654
Cash provided by (used in) activities of discontinued operations									0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES									(28,374)	329,379	23,654
Proceeds from Issuance of Common Stock										123,059
Issuance of notes and bank borrowings, net of issuance costs									150,000	60,000	95,000
Payments on debt, capital leases, and associated costs									(150,000)	(195,878)	(60,826)
Payment for Contingent Consideration Liability, Financing Activities									0	0
Net intercompany financing activity									22,988	55,611	(50,640)
Other									(1,801)	(3,404)	(5,160)
Cash provided by (used in) activities of continuing operations									21,187	39,388	(21,626)
Cash provided by (used in) activities of discontinued operations									0	0	0
Cash provided by (used in) activities of discontinued operations									21,187	39,388	(21,626)
Effect of exchange rate changes on cash and cash equivalents									8	0	0
Less net cash provided by (used in) discontinued operations									0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH									9,747	(8,392)	(43,285)
Cash, cash equivalents and restricted cash at beginning of period				4,356				12,748	4,356	12,748	56,033
Cash, cash equivalents and restricted cash at end of period	14,103				4,356				14,103	4,356	12,748
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										125,325	55,656
Cash provided by (used in) activities of discontinued operations									0	0	0
Cash provided by (used in) operating activities									135,576	125,325	55,656
Capital expenditures									(60,306)	(48,324)	(58,040)
Proceeds from the sale of assets									792	913	446
Purchase of investments									0	(1)	0
Sale of investments									0	0	1,019
Payments to Acquire Businesses, Net of Cash Acquired											0
Proceeds from notes receivable										0	0
Other									0	32	217
Investments in consolidated subsidiaries									(38)	180	159
Cash provided by (used in) activities of continuing operations											(56,199)
Cash provided by (used in) activities of discontinued operations									0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES									(59,552)	(47,200)	(56,199)
Proceeds from Issuance of Common Stock										0
Issuance of notes and bank borrowings, net of issuance costs									0	0	0
Payments on debt, capital leases, and associated costs									(15,621)	(17,364)	(12,239)
Payment for Contingent Consideration Liability, Financing Activities									0	0
Net intercompany financing activity									(59,103)	(59,068)	(13,906)
Other									0	0	0
Cash provided by (used in) activities of continuing operations									(74,724)	(76,432)	(26,145)
Cash provided by (used in) activities of discontinued operations									0	0	0
Cash provided by (used in) activities of discontinued operations									(74,724)	(76,432)	(26,145)
Effect of exchange rate changes on cash and cash equivalents									2	(2)	(11)
Less net cash provided by (used in) discontinued operations									0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH									1,302	1,691	(26,699)
Cash, cash equivalents and restricted cash at beginning of period				27,231				25,540	27,231	25,540	52,239
Cash, cash equivalents and restricted cash at end of period	28,533				27,231				28,533	27,231	25,540
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										19,646	12,676
Cash provided by (used in) activities of discontinued operations										0	(2,690)
Cash provided by (used in) operating activities									56,520	19,646	9,986
Capital expenditures									(38,656)	(50,957)	(82,357)
Proceeds from the sale of assets									237	120	108
Purchase of investments									0	(3)	5
Sale of investments									0	0	0
Payments to Acquire Businesses, Net of Cash Acquired											(6,914)
Proceeds from notes receivable										0	0
Other									(252)	(164)	(252)
Investments in consolidated subsidiaries									613	327	3,218
Cash provided by (used in) activities of continuing operations											(72,364)
Cash provided by (used in) activities of discontinued operations									0	0	(28,470)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES									(38,058)	(50,677)	(100,834)
Proceeds from Issuance of Common Stock										0
Issuance of notes and bank borrowings, net of issuance costs									0	0	0
Payments on debt, capital leases, and associated costs									(10,363)	(8,612)	(21,994)
Payment for Contingent Consideration Liability, Financing Activities									(18,750)	(18,697)
Net intercompany financing activity									36,115	3,457	64,546
Other									0	0	0
Cash provided by (used in) activities of continuing operations									7,002	(23,852)	42,552
Cash provided by (used in) activities of discontinued operations									0	0	(22)
Cash provided by (used in) activities of discontinued operations									7,002	(23,852)	42,530
Effect of exchange rate changes on cash and cash equivalents									639	533	39
Less net cash provided by (used in) discontinued operations									0	0	(32,930)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH									26,103	(54,350)	(15,349)
Cash, cash equivalents and restricted cash at beginning of period				$ 25,431				$ 79,781	25,431	79,781	95,130
Cash, cash equivalents and restricted cash at end of period	$ 51,534				$ 25,431				$ 51,534	$ 25,431	$ 79,781