Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	$ (1,294)	$ 24,105	$ 14,247	$ 68,040
Cash provided by (used in) activities of discontinued operations	0	5,175	(2,690)	16,510
Cash provided by (used in) operating activities	(1,294)	29,280	11,557	84,550
Capital expenditures	(41,165)	(37,107)	(83,510)	(60,698)
Proceeds from the sale of assets	96	436	156	15,455
Purchase of investments	(39)	(8,948)	(400)	(9,964)
Sales of investments	11,141	898	12,760	10,918
Other	(33)	(52)	(98)	(66)
Investments in consolidated subsidiaries	0	0		0
Cash provided by (used in) activities of continuing operations	(30,000)	(44,773)	(71,092)	(44,355)
Cash provided by (used in) activities of discontinued operations	0	(375)	(28,470)	(763)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(30,000)	(45,148)	(99,562)	(45,118)
Issuance of notes and bank borrowings, net of issuance costs	0	244,958	15,000	244,958
Payments on debt, capital leases, and associated costs	(4,373)	(188,910)	(22,822)	(192,116)
Net intercompany financing activity	0	0		0
Other	(233)	(473)	(4,839)	(3,720)
Cash provided by (used in) activities of continuing operations	(4,606)	55,575	(12,661)	49,122
Cash provided by (used in) activities of discontinued operations	0	(21)	(22)	(41)
Cash provided by (used in) activities of discontinued operations	(4,606)	55,554	(12,683)	49,081
Effect of exchange rate changes on cash and cash equivalents	(175)	328	382	884
Less net cash provided by (used in) discontinued operations	0	(338)	(32,930)	5,189
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(36,075)	40,352	(67,376)	84,208
Cash, cash equivalents and restricted cash at beginning of period	172,101	170,457	203,402	126,601
Cash, cash equivalents and restricted cash at end of period	136,026	210,809	136,026	210,809
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	(14,762)	(5,521)	(18,718)	(21,597)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	(14,762)	(5,521)	(18,718)	(21,597)
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
Other	0	0	0	0
Investments in consolidated subsidiaries	14,762	(513)	18,718	21,597
Cash provided by (used in) activities of continuing operations	14,762	(513)	18,718	21,597
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	14,762	(513)	18,718	21,597
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	6,034	0	0
Other	0	0	0	0
Cash provided by (used in) activities of continuing operations	0	6,034	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	6,034	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	8,363	(5,005)	425	(9,820)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	8,363	(5,005)	425	(9,820)
Capital expenditures	(101)	(989)	(184)	(1,308)
Proceeds from the sale of assets	23	1	23	8,917
Purchase of investments	(39)	(8,948)	(400)	(9,964)
Sales of investments	10,753	0	11,820	9,157
Other	(79)	9	(79)	55
Investments in consolidated subsidiaries	(15,037)	(550)	(19,199)	(13,004)
Cash provided by (used in) activities of continuing operations	(4,480)	(10,477)	(8,019)	(6,147)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(4,480)	(10,477)	(8,019)	(6,147)
Issuance of notes and bank borrowings, net of issuance costs	0	244,958	15,000	244,958
Payments on debt, capital leases, and associated costs	0	(185,538)	0	(185,538)
Net intercompany financing activity	(13,987)	(6,680)	(34,368)	7,638
Other	(233)	(473)	(4,839)	(3,720)
Cash provided by (used in) activities of continuing operations	(14,220)	52,267	(24,207)	63,338
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	(14,220)	52,267	(24,207)	63,338
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	(10,337)	36,785	(31,801)	47,371
Cash, cash equivalents and restricted cash at beginning of period	34,569	76,923	56,033	66,337
Cash, cash equivalents and restricted cash at end of period	24,232	113,708	24,232	113,708
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	20,720	14,844	26,115	32,027
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) operating activities	20,720	14,844	26,115	32,027
Capital expenditures	(12,537)	(23,937)	(26,878)	(40,912)
Proceeds from the sale of assets	73	443	133	6,594
Purchase of investments	0	0	0	0
Sales of investments	388	898	940	1,761
Other	109	0	109	0
Investments in consolidated subsidiaries	28	823	65	753
Cash provided by (used in) activities of continuing operations	(11,939)	(21,773)	(25,631)	(31,804)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(11,939)	(21,773)	(25,631)	(31,804)
Issuance of notes and bank borrowings, net of issuance costs	0	0	0	0
Payments on debt, capital leases, and associated costs	(2,532)	(2,021)	(4,927)	(3,895)
Net intercompany financing activity	3,354	10,886	(7,592)	1,561
Other	0	0		0
Cash provided by (used in) activities of continuing operations	822	8,865	(12,519)	(2,334)
Cash provided by (used in) activities of discontinued operations	0	0	0	0
Cash provided by (used in) activities of discontinued operations	822	8,865	(12,519)	(2,334)
Effect of exchange rate changes on cash and cash equivalents	(6)	0	(4)	0
Less net cash provided by (used in) discontinued operations	0	0	0	0
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	9,597	1,936	(12,039)	(2,111)
Cash, cash equivalents and restricted cash at beginning of period	30,603	45,976	52,239	50,023
Cash, cash equivalents and restricted cash at end of period	40,200	47,912	40,200	47,912
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash provided by (used in) activities of continuing operations	(15,615)	19,787	6,425	67,430
Cash provided by (used in) activities of discontinued operations	0	5,175	(2,690)	16,510
Cash provided by (used in) operating activities	(15,615)	24,962	3,735	83,940
Capital expenditures	(28,527)	(12,181)	(56,448)	(18,478)
Proceeds from the sale of assets	0	(8)	0	(56)
Purchase of investments	0	0	0	0
Sales of investments	0	0	0	0
Other	(63)	(61)	(128)	(121)
Investments in consolidated subsidiaries	247	240	416	(9,346)
Cash provided by (used in) activities of continuing operations	(28,343)	(12,010)	(56,160)	(28,001)
Cash provided by (used in) activities of discontinued operations	0	(375)	(28,470)	(763)
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(28,343)	(12,385)	(84,630)	(28,764)
Issuance of notes and bank borrowings, net of issuance costs	0	0	0	0
Payments on debt, capital leases, and associated costs	(1,841)	(1,351)	(17,895)	(2,683)
Net intercompany financing activity	10,633	(10,240)	41,960	(9,199)
Other	0	0		0
Cash provided by (used in) activities of continuing operations	8,792	(11,591)	24,065	(11,882)
Cash provided by (used in) activities of discontinued operations	0	(21)	(22)	(41)
Cash provided by (used in) activities of discontinued operations	8,792	(11,612)	24,043	(11,923)
Effect of exchange rate changes on cash and cash equivalents	(169)	328	386	884
Less net cash provided by (used in) discontinued operations	0	(338)	(32,930)	5,189
NET CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(35,335)	1,631	(23,536)	38,948
Cash, cash equivalents and restricted cash at beginning of period	106,929	47,558	95,130	10,241
Cash, cash equivalents and restricted cash at end of period	$ 71,594	$ 49,189	$ 71,594	$ 49,189