Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations		$ 72	$ 5,789	$ (1,294)	$ 15,541	$ 91,811	$ 37,308	$ 24,103	$ 43,938	$ 20,108	$ 197,160	$ 96,461
Cash provided by (used in) activities of discontinued operations										(2,690)	11,296	29,356
Cash provided by (used in) operating activities										17,418	208,456	125,817
Capital expenditures		(17,805)	$ (39,472)	$ (41,165)	(42,345)	(47,054)	$ (28,982)	$ (37,107)	(23,591)	(140,787)	(136,734)	(94,382)
Proceeds from the sale of assets										577	16,705	16,296
Purchase of investments										(426)	(15,058)	(178)
Sales of investments										12,713	11,321	7,077
Payments to Acquire Businesses, Net of Cash Acquired										6,914	(156,248)	(1,417)
Proceeds from Collection of Notes Receivable										19,000	0	0
Other										11	2,864	1,756
Investments in consolidated subsidiaries										0	0	0
Cash provided by (used in) activities of continuing operations										(101,998)	(277,150)	(70,848)
Cash provided by (used in) activities of discontinued operations										(28,470)	(1,392)	(6,631)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(130,468)	(278,542)	(77,479)
Issuance of notes and bank borrowings, net of issuance costs										95,000	342,620	0
Payments on debt, capital leases, and associated costs										(95,059)	(203,045)	(318,153)
Cash payments on gold production royalty										0	0	(27,155)
Net intercompany financing activity										0	0	0
Proceeds from Issuance of Common Stock										0	0	269,556
Other										(5,160)	(3,746)	172
Cash provided by (used in) activities of continuing operations										(5,219)	135,829	(75,580)
Cash provided by (used in) activities of discontinued operations										(22)	(84)	(4,648)
Cash provided by (used in) activities of discontinued operations										(5,241)	135,745	(80,228)
Effect of exchange rate changes on cash and cash equivalents										28	203	(678)
Less net cash provided by (used in) discontinued operations	[1]									(32,930)	(10,939)	1,576
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										(85,333)	76,801	(34,144)
Cash, cash equivalents and restricted cash at beginning of period					203,402				126,601	203,402	126,601	160,745
Cash, cash equivalents and restricted cash at end of period		118,069				203,402				118,069	203,402	126,601
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										(2,911)	(43,528)	(126,969)
Cash provided by (used in) activities of discontinued operations										0	0	0
Cash provided by (used in) operating activities										(2,911)	(43,528)	(126,969)
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	0
Proceeds from Collection of Notes Receivable										0
Other										0	0	0
Investments in consolidated subsidiaries										2,911	22,389	82,808
Cash provided by (used in) activities of continuing operations										2,911	22,389	82,808
Cash provided by (used in) activities of discontinued operations										0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										2,911	22,389	82,808
Issuance of notes and bank borrowings, net of issuance costs										0	0
Payments on debt, capital leases, and associated costs										0	0	0
Cash payments on gold production royalty												0
Net intercompany financing activity										0	380	27,660
Proceeds from Issuance of Common Stock												0
Other										0	0	0
Cash provided by (used in) activities of continuing operations										0	380	27,660
Cash provided by (used in) activities of discontinued operations										0	20,759	16,501
Cash provided by (used in) activities of discontinued operations										0	21,139	44,161
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										(45,313)	(8,470)	62,207
Cash provided by (used in) activities of discontinued operations										0	0	0
Cash provided by (used in) operating activities										(45,313)	(8,470)	62,207
Capital expenditures										(390)	(1,941)	(246)
Proceeds from the sale of assets										23	8,917	0
Purchase of investments										(431)	(15,057)	(178)
Sales of investments										11,694	9,157	501
Payments to Acquire Businesses, Net of Cash Acquired										0	(156,248)	0
Proceeds from Collection of Notes Receivable										19,000
Other										46	62	1,568
Investments in consolidated subsidiaries										(6,288)	34,419	107,855
Cash provided by (used in) activities of continuing operations										23,654	(189,529)	(106,210)
Cash provided by (used in) activities of discontinued operations										0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										23,654	(189,529)	(106,210)
Issuance of notes and bank borrowings, net of issuance costs										95,000	342,620
Payments on debt, capital leases, and associated costs										(60,826)	(185,538)	(303,686)
Cash payments on gold production royalty												0
Net intercompany financing activity										(50,640)	(34,359)	(45,850)
Proceeds from Issuance of Common Stock												269,556
Other										(5,160)	(3,746)	172
Cash provided by (used in) activities of continuing operations										(21,626)	187,695	11,892
Cash provided by (used in) activities of discontinued operations										0	0	0
Cash provided by (used in) activities of discontinued operations										(21,626)	187,695	11,892
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										(43,285)	(10,304)	(32,111)
Cash, cash equivalents and restricted cash at beginning of period					56,033				66,337	56,033	66,337	98,448
Cash, cash equivalents and restricted cash at end of period		12,748				56,033				12,748	56,033	66,337
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										55,656	118,667	134,892
Cash provided by (used in) activities of discontinued operations										0	0	0
Cash provided by (used in) operating activities										55,656	118,667	134,892
Capital expenditures										(58,040)	(85,967)	(58,084)
Proceeds from the sale of assets										446	6,902	4,800
Purchase of investments										0	(1)	0
Sales of investments										1,019	2,164	6,576
Payments to Acquire Businesses, Net of Cash Acquired										0	0	0
Proceeds from Collection of Notes Receivable										0
Other										217	0	368
Investments in consolidated subsidiaries										159	(12,911)	(25,047)
Cash provided by (used in) activities of continuing operations										(56,199)	(63,991)	(21,293)
Cash provided by (used in) activities of discontinued operations										0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(56,199)	(63,991)	(21,293)
Issuance of notes and bank borrowings, net of issuance costs										0	0
Payments on debt, capital leases, and associated costs										(12,239)	(7,926)	(10,894)
Cash payments on gold production royalty												0
Net intercompany financing activity										(13,906)	44,540	86,914
Proceeds from Issuance of Common Stock												0
Other										0	0	0
Cash provided by (used in) activities of continuing operations										(26,145)	(52,466)	(97,808)
Cash provided by (used in) activities of discontinued operations										0	0	0
Cash provided by (used in) activities of discontinued operations										(26,145)	(52,466)	(97,808)
Effect of exchange rate changes on cash and cash equivalents										(11)	6	4
Less net cash provided by (used in) discontinued operations										0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										(26,699)	2,216	15,795
Cash, cash equivalents and restricted cash at beginning of period					52,239				50,023	52,239	50,023	34,228
Cash, cash equivalents and restricted cash at end of period		25,540				52,239				25,540	52,239	50,023
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations										12,676	130,491	26,331
Cash provided by (used in) activities of discontinued operations										(2,690)	11,296	29,356
Cash provided by (used in) operating activities										9,986	141,787	55,687
Capital expenditures										(82,357)	(48,826)	(36,052)
Proceeds from the sale of assets										108	886	11,496
Purchase of investments										5	0	0
Sales of investments										0	0	0
Payments to Acquire Businesses, Net of Cash Acquired										6,914	0	(1,417)
Proceeds from Collection of Notes Receivable										0
Other										(252)	2,802	(180)
Investments in consolidated subsidiaries										3,218	881	0
Cash provided by (used in) activities of continuing operations										(72,364)	(46,019)	(26,153)
Cash provided by (used in) activities of discontinued operations										(28,470)	(1,392)	(6,631)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES										(100,834)	(47,411)	(32,784)
Issuance of notes and bank borrowings, net of issuance costs										0	0
Payments on debt, capital leases, and associated costs										(21,994)	(9,581)	(3,573)
Cash payments on gold production royalty												(27,155)
Net intercompany financing activity										64,546	(9,801)	13,404
Proceeds from Issuance of Common Stock												0
Other										0	0	0
Cash provided by (used in) activities of continuing operations										42,552	220	(17,324)
Cash provided by (used in) activities of discontinued operations										(22)	(20,843)	(21,149)
Cash provided by (used in) activities of discontinued operations										42,530	(20,623)	(38,473)
Effect of exchange rate changes on cash and cash equivalents										39	197	(682)
Less net cash provided by (used in) discontinued operations										(32,930)	(10,939)	1,576
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH										(15,349)	84,889	(17,828)
Cash, cash equivalents and restricted cash at beginning of period					$ 95,130				$ 10,241	95,130	10,241	28,069
Cash, cash equivalents and restricted cash at end of period		$ 79,781				$ 95,130				$ 79,781	$ 95,130	$ 10,241

[1] Less net cash provided by (used in) discontinued operations includes the following cash transactions: net subsidiary payments to parent company of $1,748, $20,759, and $16,501 during the years ended December 31, 2018, 2017, and 2016, respectively.