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Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Oct. 02, 2014
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Revenue |  | $ 162,552 | $ 170,938 | $ 481,770 | $ 495,133 |  |
Costs applicable to sales | [1] | 120,237 | 125,910 | 354,397 | 351,492 |  |
Amortization |  | 35,497 | 41,985 | 107,560 | 123,834 |  |
General and Administrative Expense |  | 6,694 | 8,515 | 23,979 | 31,809 |  |
Exploration Expense, Mining |  | 2,112 | 6,587 | 9,957 | 15,957 |  |
Pre-development, reclamation, and other |  | 4,938 | 4,244 | 13,968 | 20,019 |  |
Total costs and expenses |  | 169,478 | 187,241 | 509,861 | 543,111 |  |
Loss on termination of revolving credit facility |  | 0 | 0 | 0 | (3,035) |  |
Gain (loss) on derivative instruments |  | 5,786 | 16,105 | 3,657 | (3,611) |  |
Impairment of equity securities |  | (483) | (1,092) | (2,028) | (4,614) |  |
Other, net |  | (8,893) | (1,303) | (14,257) | (6,927) |  |
Interest expense, net |  | (12,446) | (11,616) | (33,945) | (36,980) |  |
Total other income (expense), net |  | (15,553) | 3,186 | (44,545) | (47,518) |  |
Income (loss) before income and mining taxes |  | (22,479) | (13,117) | (72,636) | (95,496) |  |
Income and mining tax benefit (expense) |  | 8,260 | 16,583 | 8,451 | 18,650 |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | (14,219) | 3,466 | (64,185) | (76,846) |  |
Income (Loss) from Equity Method Investments |  | 0 | 0 | 0 | 0 |  |
NET INCOME (LOSS) |  | (14,219) | 3,466 | (64,185) | (76,846) |  |
Unrealized gain (loss) on available for sale securities |  | (931) | (1,086) | (3,744) | (1,487) |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  | 0 | 221 | 904 | 238 |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax |  | 483 | 669 | 2,028 | 2,828 |  |
Other comprehensive income (loss) |  | (448) | (196) | (812) | 1,579 |  |
COMPREHENSIVE INCOME (LOSS) |  | (14,667) | 3,270 | (64,997) | (75,267) |  |
Coeur Mining, Inc. |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Revenue |  | 0 | 0 | 0 | 0 |  |
Costs applicable to sales |  | 0 | 0 | 0 | 0 |  |
Amortization |  | 495 | 473 | 1,493 | 1,298 |  |
General and Administrative Expense |  | 6,563 | 8,251 | 23,690 | 31,019 |  |
Exploration Expense, Mining |  | 642 | 1,056 | 1,796 | 2,592 |  |
Pre-development, reclamation, and other |  | 887 | 180 | 3,437 | 532 |  |
Total costs and expenses |  | 8,587 | 9,960 | 30,416 | 35,441 |  |
Gain (loss) on derivative instruments |  | 1,036 | 2,990 | 1,178 | 1,008 |  |
Other, net |  | 1,218 | 1,006 | 3,108 | 2,921 |  |
Interest expense, net |  | (11,198) | (9,159) | (29,389) | (28,557) |  |
Total other income (expense), net |  | (8,944) | (5,163) | (25,103) | (24,628) |  |
Income (loss) before income and mining taxes |  | (17,531) | (15,123) | (55,519) | (60,069) |  |
Income and mining tax benefit (expense) |  | 516 | 950 | 4,011 | 1,076 |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | (17,015) | (14,173) | (51,508) | (58,993) |  |
Income (Loss) from Equity Method Investments |  | 2,796 | 17,640 | (12,677) | (17,853) |  |
NET INCOME (LOSS) |  | (14,219) | 3,467 | (64,185) | (76,846) |  |
Unrealized gain (loss) on available for sale securities |  | (931) | (1,087) | (3,744) | (1,487) |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  |  | 221 | 904 | 238 |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax |  | 483 | 669 | 2,028 | 2,828 |  |
Other comprehensive income (loss) |  | (448) | (197) | (812) | 1,579 |  |
COMPREHENSIVE INCOME (LOSS) |  | (14,667) | 3,270 | (64,997) | (75,267) |  |
Guarantor Subsidiaries |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Revenue |  | 93,417 | 78,468 | 281,724 | 199,716 |  |
Costs applicable to sales |  | 68,187 | 58,386 | 197,475 | 149,223 |  |
Amortization |  | 21,083 | 18,485 | 61,422 | 50,565 |  |
General and Administrative Expense |  | 11 | 2 | 25 | 5 |  |
Exploration Expense, Mining |  | (96) | 2,915 | 3,370 | 7,819 |  |
Pre-development, reclamation, and other |  | 1,476 | 115 | 4,354 | 2,958 |  |
Total costs and expenses |  | 90,661 | 79,903 | 266,646 | 210,570 |  |
Gain (loss) on derivative instruments |  | 1,751 | 4,345 | 596 | 1,835 |  |
Other, net |  | (436) | (1,417) | (2,892) | (4,881) |  |
Interest expense, net |  | (220) | (320) | (771) | (660) |  |
Total other income (expense), net |  | 1,095 | 2,608 | (3,067) | (3,706) |  |
Income (loss) before income and mining taxes |  | 3,851 | 1,173 | 12,011 | (14,560) |  |
Income and mining tax benefit (expense) |  | (1,554) | (210) | (2,836) | (629) |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | 2,297 | 963 | 9,175 | (15,189) |  |
Income (Loss) from Equity Method Investments |  | 331 | 181 | 491 | 480 |  |
NET INCOME (LOSS) |  | 2,628 | 1,144 | 9,666 | (14,709) |  |
Unrealized gain (loss) on available for sale securities |  | (769) | (1,071) | (2,751) | (1,451) |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  |  | 221 | 904 | 238 |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax |  | 483 | 669 | 2,028 | 2,828 |  |
Other comprehensive income (loss) |  | (286) | (181) | 181 | 1,615 |  |
COMPREHENSIVE INCOME (LOSS) |  | 2,342 | 963 | 9,847 | (13,094) |  |
Non-Guarantor Subsidiaries |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Revenue |  | 69,135 | 92,470 | 200,046 | 295,417 |  |
Costs applicable to sales |  | 52,050 | 67,524 | 156,922 | 202,269 |  |
Amortization |  | 13,919 | 23,027 | 44,645 | 71,971 |  |
General and Administrative Expense |  | 120 | 262 | 264 | 785 |  |
Exploration Expense, Mining |  | 1,566 | 2,616 | 4,791 | 5,546 |  |
Pre-development, reclamation, and other |  | 2,575 | 3,949 | 6,177 | 16,529 |  |
Total costs and expenses |  | 70,230 | 97,378 | 212,799 | 297,100 |  |
Gain (loss) on derivative instruments |  | 2,999 | 8,770 | 1,883 | (6,454) |  |
Other, net |  | (8,649) | (165) | (11,681) | (2,886) |  |
Interest expense, net |  | (2,054) | (2,864) | (6,577) | (9,844) |  |
Total other income (expense), net |  | (7,704) | 5,741 | (16,375) | (19,184) |  |
Income (loss) before income and mining taxes |  | (8,799) | 833 | (29,128) | (20,867) |  |
Income and mining tax benefit (expense) |  | 9,298 | 15,843 | 7,276 | 18,203 |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | 499 | 16,676 | (21,852) | (2,664) |  |
Income (Loss) from Equity Method Investments |  | 0 | 0 | 0 | 0 |  |
NET INCOME (LOSS) |  | 499 | 16,676 | (21,852) | (2,664) |  |
Unrealized gain (loss) on available for sale securities |  | 0 | 0 | 0 | 0 |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  |  | 0 | 0 |  |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax |  | 0 | 0 | 0 | 0 |  |
Other comprehensive income (loss) |  | 0 | 0 | 0 | 0 |  |
COMPREHENSIVE INCOME (LOSS) |  | 499 | 16,676 | (21,852) | (2,664) |  |
Eliminations |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Revenue |  | 0 | 0 | 0 | 0 |  |
Costs applicable to sales |  | 0 | 0 | 0 | 0 |  |
Amortization |  | 0 | 0 | 0 | 0 |  |
General and Administrative Expense |  | 0 | 0 | 0 | 0 |  |
Exploration Expense, Mining |  | 0 | 0 | 0 | 0 |  |
Pre-development, reclamation, and other |  | 0 | 0 | 0 | 0 |  |
Total costs and expenses |  | 0 | 0 | 0 | 0 |  |
Gain (loss) on derivative instruments |  | 0 | 0 | 0 | 0 |  |
Other, net |  | (1,026) | (727) | (2,792) | (2,081) |  |
Interest expense, net |  | 1,026 | 727 | 2,792 | 2,081 |  |
Total other income (expense), net |  | 0 | 0 | 0 | 0 |  |
Income (loss) before income and mining taxes |  | 0 | 0 | 0 | 0 |  |
Income and mining tax benefit (expense) |  | 0 | 0 | 0 | 0 |  |
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest |  | 0 | 0 | 0 | 0 |  |
Income (Loss) from Equity Method Investments |  | (3,127) | (17,821) | 12,186 | 17,373 |  |
NET INCOME (LOSS) |  | (3,127) | (17,821) | 12,186 | 17,373 |  |
Unrealized gain (loss) on available for sale securities |  | 769 | 1,072 | 2,751 | 1,451 |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  |  | (221) | (904) | (238) |  |
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI for Write-down of Securities, Net of Tax |  | (483) | (669) | (2,028) | (2,828) |  |
Other comprehensive income (loss) |  | 286 | 182 | (181) | (1,615) |  |
COMPREHENSIVE INCOME (LOSS) |  | $ (2,841) | (17,639) | $ 12,005 | 15,758 |  |
Senior Notes due Two Thousand Twenty One [Member] |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 7.875% |  | 7.875% |  | 7.875% |
Operating Segments [Member] |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Revenue |  | $ 162,552 | 170,938 | $ 481,770 |  |  |
Costs applicable to sales |  | 120,237 | 125,910 | 354,397 |  |  |
Amortization |  | 35,497 | 41,985 | 107,560 |  |  |
Other, net |  | (8,893) | (1,303) | $ (14,257) | (6,927) |  |
NET INCOME (LOSS) |  | $ (14,219) | $ 3,466 |  | $ (76,846) |  |
Palmarejo gold stream agreement [Member] |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |
Aggregate deposit to be received |  |  |  |  |  |  | $ 22,000
[1] | Excludes amortization.

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