Supplemental Guarantor Information Condensed Consolidated Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Acquisitions, net of cash acquired	$ (102,018)	$ 0
Net Cash Provided by (Used in) Operating Activities	(3,972)	(9,627)
Capital expenditures	(17,620)	(11,936)
Purchase of short term investments and equity securities	(278)	(46,220)
Sales and maturities of short-term investments	229	90
Proceeds from Discontinued Operations Sale of Assets and Other	(1,730)	(25)
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities	(121,417)	(58,091)
Issuance of notes and bank borrowings	53,500	153,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	(8,594)	(4,111)
Payments to Acquire Royalty Interests in Mining Properties	(10,368)	(14,683)
Proceeds From Repayment Intercompany Borrowings	0	0
Proceeds from (Payments for) Other Financing Activities	(423)	(246)
CASH PROVIDED BY FINANCING ACTIVITIES	34,115	133,960
Cash and Cash Equivalents, Period Increase (Decrease)	(91,274)	66,242
Cash and cash equivalents at beginning of period	270,861	206,690
Cash and cash equivalents at end of period	179,587	272,932
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	(103,000)
Net Cash Provided by (Used in) Operating Activities	(44,918)	(37,623)
Capital expenditures	(12)	(945)
Purchase of short term investments and equity securities	(278)	(45,796)
Sales and maturities of short-term investments	0	90
Proceeds from Discontinued Operations Sale of Assets and Other	(1,767)	0
Payments to Acquire Interest in Subsidiaries and Affiliates	12,221	13,160
Net Cash Provided by (Used in) Investing Activities	(92,836)	(33,491)
Issuance of notes and bank borrowings	50,000	153,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	(6,582)	(3,196)
Payments to Acquire Royalty Interests in Mining Properties	0	0
Proceeds From Repayment Intercompany Borrowings	(1,730)	(11,475)
Proceeds from (Payments for) Other Financing Activities	(423)	(246)
CASH PROVIDED BY FINANCING ACTIVITIES	41,265	138,083
Cash and Cash Equivalents, Period Increase (Decrease)	(96,489)	66,969
Cash and cash equivalents at beginning of period	210,361	137,076
Cash and cash equivalents at end of period	113,872	204,045
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired
Net Cash Provided by (Used in) Operating Activities	29,908	4,932
Capital expenditures	(7,399)	(5,670)
Purchase of short term investments and equity securities	0	(424)
Sales and maturities of short-term investments	145	0
Proceeds from Discontinued Operations Sale of Assets and Other	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	(810)	(178)
Net Cash Provided by (Used in) Investing Activities	(8,064)	(6,272)
Issuance of notes and bank borrowings	0	0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	(1,818)	(412)
Payments to Acquire Royalty Interests in Mining Properties	0	0
Proceeds From Repayment Intercompany Borrowings	(19,628)	1,515
Proceeds from (Payments for) Other Financing Activities	0	0
CASH PROVIDED BY FINANCING ACTIVITIES	(21,446)	1,103
Cash and Cash Equivalents, Period Increase (Decrease)	398	(237)
Cash and cash equivalents at beginning of period	5,781	991
Cash and cash equivalents at end of period	6,179	754
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	982
Net Cash Provided by (Used in) Operating Activities	(1,166)	10,082
Capital expenditures	(10,209)	(5,321)
Purchase of short term investments and equity securities	0	0
Sales and maturities of short-term investments	84	0
Proceeds from Discontinued Operations Sale of Assets and Other	37	(25)
Payments to Acquire Interest in Subsidiaries and Affiliates	0	0
Net Cash Provided by (Used in) Investing Activities	(9,106)	(5,346)
Issuance of notes and bank borrowings	3,500	0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	(194)	(503)
Payments to Acquire Royalty Interests in Mining Properties	(10,368)	(14,683)
Proceeds From Repayment Intercompany Borrowings	21,358	9,960
Proceeds from (Payments for) Other Financing Activities	793	0
CASH PROVIDED BY FINANCING ACTIVITIES	15,089	(5,226)
Cash and Cash Equivalents, Period Increase (Decrease)	4,817	(490)
Cash and cash equivalents at beginning of period	54,719	68,623
Cash and cash equivalents at end of period	59,536	68,133
Eliminations
Condensed Financial Statements, Captions [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	0
Net Cash Provided by (Used in) Operating Activities	12,204	12,982
Capital expenditures	0	0
Purchase of short term investments and equity securities	0	0
Sales and maturities of short-term investments	0	0
Proceeds from Discontinued Operations Sale of Assets and Other	0	0
Payments to Acquire Interest in Subsidiaries and Affiliates	(11,411)	(12,982)
Net Cash Provided by (Used in) Investing Activities	(11,411)	(12,982)
Issuance of notes and bank borrowings	0	0
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	0	0
Payments to Acquire Royalty Interests in Mining Properties	0	0
Proceeds From Repayment Intercompany Borrowings	0	0
Proceeds from (Payments for) Other Financing Activities	(793)	0
CASH PROVIDED BY FINANCING ACTIVITIES	(793)	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0