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Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue |  | $ 162,123 |  | $ 169,987 |  | $ 316,993 | $ 333,254 |
Pre-development, reclamation, and other |  | 4,334 |  | 3,620 |  | 8,768 | 7,845 |
Amortization |  | 43,204 |  | 29,459 |  | 85,080 | 60,236 |
General and administrative |  | 7,750 |  | 7,650 |  | 17,224 | 16,454 |
Fair value adjustments, net |  | (5,296) |  | (2,462) |  | 3,824 | 2,192 |
Other, net |  | 643 |  | 544 |  | 703 | 1,057 |
Interest expense, net of capitalized interest |  | (6,825) |  | (6,018) |  | (13,279) | (11,983) |
Total other income (expense), net |  | (11,478) |  | (7,936) |  | (8,752) | (8,734) |
Total |  | (42,310) |  | 6,647 |  | (75,862) | 19,287 |
Income and mining tax (expense) benefit |  | 5,546 |  | (3,717) |  | 14,204 | (15,666) |
Income (loss) from continuing operations |  | (36,764) |  | 2,930 |  | (61,658) | 3,621 |
Equity income (loss) in consolidated subsidiaries |  | 0 |  | 0 |  | 0 | 0 |
Income (loss) from discontinued operations |  | 0 |  | 0 |  | 5,693 | 550 |
NET INCOME (LOSS) |  | (36,764) | $ (19,201) | 2,930 | $ 1,241 | (55,965) | 4,171 |
Unrealized gain (loss) on debt securities, net of tax |  | 0 |  | (87) |  | 59 | (365) |
Other comprehensive income (loss) |  | 0 | $ 59 | (87) | $ (278) | 59 | (365) |
COMPREHENSIVE INCOME (LOSS) |  | (36,764) |  | 2,843 |  | (55,906) | 3,806 |
Operating Expenses |  | 192,955 |  | 155,404 |  | 384,103 | 305,233 |
Eliminations |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue |  | 0 |  | 0 |  | 0 | 0 |
Pre-development, reclamation, and other |  | 0 |  | 0 |  | 0 | 0 |
Amortization |  | 0 |  | 0 |  | 0 | 0 |
General and administrative |  | 0 |  | 0 |  | 0 | 0 |
Fair value adjustments, net |  | 0 |  | 0 |  | 0 | 0 |
Other, net |  | (4,310) |  | (3,896) |  | (8,613) | (7,615) |
Interest expense, net of capitalized interest |  | 4,310 |  | 3,896 |  | 8,613 | 7,615 |
Total other income (expense), net |  | 0 |  | 0 |  | 0 | 0 |
Total |  | 0 |  | 0 |  | 0 | 0 |
Income and mining tax (expense) benefit |  | 0 |  | 0 |  | 0 | 0 |
Income (loss) from continuing operations |  | 0 |  | 0 |  | 0 | 0 |
Equity income (loss) in consolidated subsidiaries |  | 24,049 |  | (14,762) |  | 45,199 | (18,718) |
Income (loss) from discontinued operations |  |  |  |  |  | 0 | 0 |
NET INCOME (LOSS) |  | 24,049 |  | (14,762) |  | 45,199 | (18,718) |
Unrealized gain (loss) on debt securities, net of tax |  |  |  | 0 |  | 0 | 0 |
Other comprehensive income (loss) |  | 0 |  |  |  |  |  |
COMPREHENSIVE INCOME (LOSS) |  | 24,049 |  | (14,762) |  | 45,199 | (18,718) |
Operating Expenses |  | 0 |  | 0 |  | 0 | 0 |
Coeur Mining, Inc. |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue |  | 0 |  | 0 |  | 0 | 0 |
Pre-development, reclamation, and other |  | 80 |  | 204 |  | 240 | 610 |
Amortization |  | 219 |  | 236 |  | 440 | 482 |
General and administrative |  | 5,982 |  | 7,634 |  | 15,456 | 16,431 |
Fair value adjustments, net |  | (5,288) |  | (2,356) |  | 3,832 | 2,590 |
Other, net |  | 5,093 |  | 4,829 |  | 10,091 | 9,304 |
Interest expense, net of capitalized interest |  | (5,815) |  | (5,258) |  | (11,544) | (10,341) |
Total other income (expense), net |  | (6,010) |  | (2,785) |  | 2,379 | 1,553 |
Total |  | (12,641) |  | (11,185) |  | (14,443) | (16,755) |
Income and mining tax (expense) benefit |  | (311) |  | (922) |  | (2,388) | 716 |
Income (loss) from continuing operations |  | (12,952) |  | (12,107) |  | (16,831) | (16,039) |
Equity income (loss) in consolidated subsidiaries |  | (23,814) |  | 15,036 |  | (44,829) | 19,200 |
Income (loss) from discontinued operations |  |  |  |  |  | 5,693 | 1,010 |
NET INCOME (LOSS) |  | (36,766) |  | 2,929 |  | (55,967) | 4,171 |
Unrealized gain (loss) on debt securities, net of tax |  |  |  | (87) |  | 59 | (365) |
Other comprehensive income (loss) |  | 0 |  |  |  |  |  |
COMPREHENSIVE INCOME (LOSS) |  | (36,766) |  | 2,842 |  | (55,908) | 3,806 |
Operating Expenses |  | 6,631 |  | 8,400 |  | 16,822 | 18,308 |
Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue |  | 90,854 |  | 99,243 |  | 181,553 | 192,473 |
Pre-development, reclamation, and other |  | 1,989 |  | 1,988 |  | 3,932 | 3,935 |
Amortization |  | 18,726 |  | 14,587 |  | 37,171 | 28,792 |
General and administrative |  | 570 |  | 9 |  | 570 | 12 |
Fair value adjustments, net |  | (8) |  | (106) |  | (8) | (398) |
Other, net |  | 273 |  | 513 |  | 438 | 376 |
Interest expense, net of capitalized interest |  | (508) |  | (367) |  | (900) | (720) |
Total other income (expense), net |  | (243) |  | 40 |  | (470) | (742) |
Total |  | (2,050) |  | 1,965 |  | (5,112) | 7,768 |
Income and mining tax (expense) benefit |  | (1,116) |  | (1,388) |  | (1,148) | (2,508) |
Income (loss) from continuing operations |  | (3,166) |  | 577 |  | (6,260) | 5,260 |
Equity income (loss) in consolidated subsidiaries |  | (212) |  | (28) |  | (630) | (66) |
Income (loss) from discontinued operations |  |  |  |  |  | 0 | (284) |
NET INCOME (LOSS) |  | (3,378) |  | 549 |  | (6,890) | 4,910 |
Unrealized gain (loss) on debt securities, net of tax |  |  |  | 0 |  | 0 | 0 |
Other comprehensive income (loss) |  | 0 |  |  |  |  |  |
COMPREHENSIVE INCOME (LOSS) |  | (3,378) |  | 549 |  | (6,890) | 4,910 |
Operating Expenses |  | 92,661 |  | 97,318 |  | 186,195 | 183,963 |
Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Revenue |  | 71,269 |  | 70,744 |  | 135,440 | 140,781 |
Pre-development, reclamation, and other |  | 2,265 |  | 1,428 |  | 4,596 | 3,300 |
Amortization |  | 24,259 |  | 14,636 |  | 47,469 | 30,962 |
General and administrative |  | 1,198 |  | 7 |  | 1,198 | 11 |
Fair value adjustments, net |  | 0 |  | 0 |  | 0 | 0 |
Other, net |  | (413) |  | (902) |  | (1,213) | (1,008) |
Interest expense, net of capitalized interest |  | (4,812) |  | (4,289) |  | (9,448) | (8,537) |
Total other income (expense), net |  | (5,225) |  | (5,191) |  | (10,661) | (9,545) |
Total |  | (27,619) |  | 15,867 |  | (56,307) | 28,274 |
Income and mining tax (expense) benefit |  | 6,973 |  | (1,407) |  | 17,740 | (13,874) |
Income (loss) from continuing operations |  | (20,646) |  | 14,460 |  | (38,567) | 14,400 |
Equity income (loss) in consolidated subsidiaries |  | (23) |  | (246) |  | 260 | (416) |
Income (loss) from discontinued operations |  |  |  |  |  | 0 | (176) |
NET INCOME (LOSS) |  | (20,669) |  | 14,214 |  | (38,307) | 13,808 |
Unrealized gain (loss) on debt securities, net of tax |  |  |  | 0 |  | 0 | 0 |
Other comprehensive income (loss) |  | 0 |  |  |  |  |  |
COMPREHENSIVE INCOME (LOSS) |  | (20,669) |  | 14,214 |  | (38,307) | 13,808 |
Operating Expenses |  | 93,663 |  | 49,686 |  | 181,086 | 102,962 |
Product [Member] |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales | [1] | 131,948 |  | 108,246 |  | 263,598 | 207,586 |
Product [Member] | Eliminations |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 0 |  | 0 |  | 0 | 0 | [1]
Product [Member] | Coeur Mining, Inc. |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 0 |  | 0 |  |  | 0 |
Product [Member] | Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 69,291 |  | 77,935 |  | 141,313 | 146,180 |
Product [Member] | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 62,657 |  | 30,311 |  | 122,285 | 61,406 |
Mineral, Exploration [Member] |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 5,719 |  | 6,429 |  | 9,433 | 13,112 |
Mineral, Exploration [Member] | Eliminations |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 0 |  | 0 |  | 0 | 0 |
Mineral, Exploration [Member] | Coeur Mining, Inc. |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 350 |  | 326 |  | 686 | 785 |
Mineral, Exploration [Member] | Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | 2,085 |  | 2,799 |  | 3,209 | 5,044 |
Mineral, Exploration [Member] | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |
Costs applicable to sales |  | $ 3,284 |  | $ 3,304 |  | $ 5,538 | $ 7,283 |
[1] | Excludes amortization.

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