Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										$ 91,880	$ 20,108	$ 197,160
Cash provided by (used in) activities of discontinued operations										0	(2,690)	11,296
Cash provided by (used in) operating activities		$ 39,295	$ 41,996	$ 26,435	$ (15,846)	$ 72	$ 5,789	$ (1,294)	$ 15,541	91,880	17,418	208,456
Capital expenditures		(20,907)	$ (30,678)	$ (20,749)	(27,438)	(17,805)	$ (39,472)	$ (41,165)	(42,345)	(99,772)	(140,787)	(136,734)
Proceeds from the sale of assets										1,033	577	16,705
Purchase of investments										(5,023)	(426)	(15,058)
Sales of investments										2,109	12,713	11,321
Payments to Acquire Businesses, Net of Cash Acquired										0	6,914	(156,248)
Proceeds from Collection of Notes Receivable										7,168	19,000	0
Other										1,919	11	2,864
Investments in consolidated subsidiaries										0	0	0
Cash provided by (used in) activities of continuing operations										(92,566)	(101,998)	(277,150)
Cash provided by (used in) activities of discontinued operations										0	(28,470)	(1,392)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(92,566)	(130,468)	(278,542)
Issuance of notes and bank borrowings, net of issuance costs										60,000	95,000	342,620
Payments on debt, capital leases, and associated costs										(221,854)	(95,059)	(203,045)
Payment for Contingent Consideration Liability, Financing Activities										(18,697)	0	0
Net intercompany financing activity										0	0	0
Proceeds from Issuance of Common Stock										123,059	0	0
Other										(3,404)	(5,160)	(3,746)
Cash provided by (used in) activities of continuing operations										(60,896)	(5,219)	135,829
Cash provided by (used in) activities of discontinued operations										0	(22)	(84)
Cash provided by (used in) activities of discontinued operations										(60,896)	(5,241)	135,745
Effect of exchange rate changes on cash and cash equivalents										531	28	203
Less net cash provided by (used in) discontinued operations	[1]									0	(32,930)	(10,939)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										(61,051)	(85,333)	76,801
Cash, cash equivalents and restricted cash at beginning of period					118,069				203,402	118,069	203,402	126,601
Cash, cash equivalents and restricted cash at end of period		57,018				118,069				57,018	118,069	203,402
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations											(2,911)	(43,528)
Cash provided by (used in) activities of discontinued operations											0	0
Cash provided by (used in) operating activities										324,068	(2,911)	(43,528)
Capital expenditures										0	0	0
Proceeds from the sale of assets										0	0	0
Purchase of investments										0	0	0
Sales of investments										0	0	0
Payments to Acquire Businesses, Net of Cash Acquired											0	0
Proceeds from Collection of Notes Receivable										0	0
Other										0	0	0
Investments in consolidated subsidiaries										(324,068)	2,911	22,389
Cash provided by (used in) activities of continuing operations											2,911	22,389
Cash provided by (used in) activities of discontinued operations											0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(324,068)	2,911	22,389
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
Net intercompany financing activity										0	0	380
Proceeds from Issuance of Common Stock										0
Other										0	0	0
Cash provided by (used in) activities of continuing operations											0	380
Cash provided by (used in) activities of discontinued operations											0	20,759
Cash provided by (used in) activities of discontinued operations										0	0	21,139
Effect of exchange rate changes on cash and cash equivalents										0	0	0
Less net cash provided by (used in) discontinued operations											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
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											(45,313)	(8,470)
Cash provided by (used in) activities of discontinued operations											0	0
Cash provided by (used in) operating activities										(377,159)	(45,313)	(8,470)
Capital expenditures										(491)	(390)	(1,941)
Proceeds from the sale of assets										0	23	8,917
Purchase of investments										(5,019)	(431)	(15,057)
Sales of investments										2,109	11,694	9,157
Payments to Acquire Businesses, Net of Cash Acquired											0	(156,248)
Proceeds from Collection of Notes Receivable										7,168	19,000
Other										2,051	46	62
Investments in consolidated subsidiaries										323,561	(6,288)	(34,419)
Cash provided by (used in) activities of continuing operations											23,654	(189,529)
Cash provided by (used in) activities of discontinued operations											0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										329,379	23,654	(189,529)
Issuance of notes and bank borrowings, net of issuance costs										60,000	95,000	342,620
Payments on debt, capital leases, and associated costs										(195,878)	(60,826)	(185,538)
Payment for Contingent Consideration Liability, Financing Activities										0
Net intercompany financing activity										57,930	(50,640)	34,359
Proceeds from Issuance of Common Stock										123,059
Other										(3,404)	(5,160)	(3,746)
Cash provided by (used in) activities of continuing operations											(21,626)	187,695
Cash provided by (used in) activities of discontinued operations											0	0
Cash provided by (used in) activities of discontinued operations										41,707	(21,626)	187,695
Effect of exchange rate changes on cash and cash equivalents										0	0	0
Less net cash provided by (used in) discontinued operations											0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										(6,073)	(43,285)	(10,304)
Cash, cash equivalents and restricted cash at beginning of period					12,748				56,033	12,748	56,033	66,337
Cash, cash equivalents and restricted cash at end of period		6,675				12,748				6,675	12,748	56,033
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations											55,656	118,667
Cash provided by (used in) activities of discontinued operations											0	0
Cash provided by (used in) operating activities										125,325	55,656	118,667
Capital expenditures										(48,324)	(58,040)	(85,967)
Proceeds from the sale of assets										913	446	6,902
Purchase of investments										(1)	0	(1)
Sales of investments										0	1,019	2,164
Payments to Acquire Businesses, Net of Cash Acquired											0	0
Proceeds from Collection of Notes Receivable										0	0
Other										32	217	0
Investments in consolidated subsidiaries										180	159	12,911
Cash provided by (used in) activities of continuing operations											(56,199)	(63,991)
Cash provided by (used in) activities of discontinued operations											0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(47,200)	(56,199)	(63,991)
Issuance of notes and bank borrowings, net of issuance costs										0	0	0
Payments on debt, capital leases, and associated costs										(17,364)	(12,239)	(7,926)
Payment for Contingent Consideration Liability, Financing Activities										0
Net intercompany financing activity										(59,061)	(13,906)	(44,540)
Proceeds from Issuance of Common Stock										0
Other										0	0	0
Cash provided by (used in) activities of continuing operations											(26,145)	(52,466)
Cash provided by (used in) activities of discontinued operations											0	0
Cash provided by (used in) activities of discontinued operations										(76,425)	(26,145)	(52,466)
Effect of exchange rate changes on cash and cash equivalents										(2)	(11)	6
Less net cash provided by (used in) discontinued operations											0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										1,698	(26,699)	2,216
Cash, cash equivalents and restricted cash at beginning of period					25,540				52,239	25,540	52,239	50,023
Cash, cash equivalents and restricted cash at end of period		27,238				25,540				27,238	25,540	52,239
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations											12,676	130,491
Cash provided by (used in) activities of discontinued operations											(2,690)	11,296
Cash provided by (used in) operating activities										19,646	9,986	141,787
Capital expenditures										(50,957)	(82,357)	(48,826)
Proceeds from the sale of assets										120	108	886
Purchase of investments										(3)	5	0
Sales of investments										0	0	0
Payments to Acquire Businesses, Net of Cash Acquired											6,914	0
Proceeds from Collection of Notes Receivable										0	0
Other										(164)	(252)	2,802
Investments in consolidated subsidiaries										327	3,218	(881)
Cash provided by (used in) activities of continuing operations											(72,364)	(46,019)
Cash provided by (used in) activities of discontinued operations											(28,470)	(1,392)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(50,677)	(100,834)	(47,411)
Issuance of notes and bank borrowings, net of issuance costs										0	0	0
Payments on debt, capital leases, and associated costs										(8,612)	(21,994)	(9,581)
Payment for Contingent Consideration Liability, Financing Activities										(18,697)
Net intercompany financing activity										1,131	64,546	9,801
Proceeds from Issuance of Common Stock										0
Other										0	0	0
Cash provided by (used in) activities of continuing operations											42,552	220
Cash provided by (used in) activities of discontinued operations											(22)	(20,843)
Cash provided by (used in) activities of discontinued operations										(26,178)	42,530	(20,623)
Effect of exchange rate changes on cash and cash equivalents										533	39	197
Less net cash provided by (used in) discontinued operations											(32,930)	(10,939)
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										(56,676)	(15,349)	84,889
Cash, cash equivalents and restricted cash at beginning of period					$ 79,781				$ 95,130	79,781	95,130	10,241
Cash, cash equivalents and restricted cash at end of period		$ 23,105				$ 79,781				$ 23,105	$ 79,781	$ 95,130

[1] Less net cash used in discontinued operations includes the following cash transactions: net subsidiary payments to parent company of $1,748 and $20,759 during the years ended December 31, 2018 and 2017.