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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, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  | $ 199,469 |  |  | $ 148,795 |  |  | $ 516,462 | $ 482,049 |
Pre-development, reclamation, and other |  | 4,851 |  |  | 8,121 |  |  | 13,619 | 15,966 |
Amortization |  | 45,678 |  |  | 31,184 |  |  | 130,758 | 91,420 |
General and administrative |  | 9,635 |  |  | 7,729 |  |  | 26,859 | 24,183 |
Loss on debt extinguishments |  | (1,282) |  |  | 0 |  |  | (1,282) | 0 |
Fair value adjustments, net |  | 4,377 |  |  | 715 |  |  | 8,201 | 2,907 |
Other, net |  | (3,634) |  |  | (20,903) |  |  | (2,931) | (19,846) |
Interest expense, net of capitalized interest |  | (5,980) |  |  | (5,818) |  |  | (19,259) | (17,801) |
Total other income (expense), net |  | (6,519) |  |  | (26,006) |  |  | (15,271) | (34,740) |
Total |  | (14,059) |  |  | (49,259) |  |  | (89,921) | (29,972) |
Income and mining tax (expense) benefit |  | (218) |  |  | (3,785) |  |  | 13,986 | (19,451) |
Income (loss) from continuing operations |  | (14,277) |  |  | (53,044) |  |  | (75,935) | (49,423) |
Equity income (loss) in consolidated subsidiaries |  | 0 |  |  | 0 |  |  | 0 | 0 |
Income (loss) from discontinued operations |  | 0 |  |  | 0 |  |  | 5,693 | 550 |
NET INCOME (LOSS) |  | (14,277) | $ (36,764) | $ (19,201) | (53,044) | $ 2,930 | $ 1,241 | (70,242) | (48,873) |
Unrealized gain (loss) on debt securities, net of tax |  | 0 |  |  | 192 |  |  | 59 | (173) |
Reclassification adjustments for impairment of equity securities, net of tax |  | 1,132 |  |  |  |  |  | 1,132 |  |
Other comprehensive income (loss) |  | 1,132 |  | $ 59 | 192 | $ (87) | $ (278) | 1,191 | (173) |
COMPREHENSIVE INCOME (LOSS) |  | (13,145) |  |  | (52,852) |  |  | (69,051) | (49,046) |
Operating Expenses |  | 207,009 |  |  | 172,048 |  |  | 591,112 | 477,281 |
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 |
Loss on debt extinguishments |  |  |  |  |  |  |  | 0 |  |
Fair value adjustments, net |  | 0 |  |  | 0 |  |  | 0 | 0 |
Other, net |  | (4,360) |  |  | (3,921) |  |  | (12,973) | (11,536) |
Interest expense, net of capitalized interest |  | 4,360 |  |  | 3,921 |  |  | 12,973 | 11,536 |
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 |  | 11,280 |  |  | 24,343 |  |  | 56,479 | 5,625 |
Income (loss) from discontinued operations |  |  |  |  |  |  |  | 0 | 0 |
NET INCOME (LOSS) |  | 11,280 |  |  | 24,343 |  |  | 56,479 | 5,625 |
Unrealized gain (loss) on debt securities, net of tax |  | 0 |  |  | 0 |  |  | 0 | 0 |
Reclassification adjustments for impairment of equity securities, net of tax |  | 0 |  |  |  |  |  | 0 |  |
COMPREHENSIVE INCOME (LOSS) |  | 11,280 |  |  | 24,343 |  |  | 56,479 | 5,625 |
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 |  | 15 |  |  | 1,302 |  |  | 255 | 1,912 |
Amortization |  | 216 |  |  | 232 |  |  | 656 | 714 |
General and administrative |  | 8,973 |  |  | 7,682 |  |  | 24,429 | 24,113 |
Loss on debt extinguishments |  |  |  |  |  |  |  | (1,282) |  |
Fair value adjustments, net |  | 4,378 |  |  | 745 |  |  | 8,210 | 3,335 |
Other, net |  | 4,557 |  |  | (14,194) |  |  | 14,648 | (4,890) |
Interest expense, net of capitalized interest |  | (4,729) |  |  | (5,445) |  |  | (16,273) | (15,786) |
Total other income (expense), net |  | 2,924 |  |  | (18,894) |  |  | 5,303 | (17,341) |
Total |  | (6,710) |  |  | (28,493) |  |  | (21,153) | (45,248) |
Income and mining tax (expense) benefit |  | 3,808 |  |  | (430) |  |  | 1,420 | 286 |
Income (loss) from continuing operations |  | (2,902) |  |  | (28,923) |  |  | (19,733) | (44,962) |
Equity income (loss) in consolidated subsidiaries |  | (11,371) |  |  | (24,122) |  |  | (56,200) | (4,922) |
Income (loss) from discontinued operations |  |  |  |  |  |  |  | 5,693 | 1,010 |
NET INCOME (LOSS) |  | (14,273) |  |  | (53,045) |  |  | (70,240) | (48,874) |
Unrealized gain (loss) on debt securities, net of tax |  | 0 |  |  | 192 |  |  | 59 | (173) |
Reclassification adjustments for impairment of equity securities, net of tax |  | 1,132 |  |  |  |  |  | 1,132 |  |
COMPREHENSIVE INCOME (LOSS) |  | (13,141) |  |  | (52,853) |  |  | (69,049) | (49,047) |
Operating Expenses |  | 9,634 |  |  | 9,599 |  |  | 26,456 | 27,907 |
Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  | 116,808 |  |  | 89,289 |  |  | 298,361 | 281,762 |
Pre-development, reclamation, and other |  | 4,465 |  |  | 5,456 |  |  | 8,397 | 9,391 |
Amortization |  | 21,751 |  |  | 15,084 |  |  | 58,922 | 43,876 |
General and administrative |  | 208 |  |  | 3 |  |  | 778 | 15 |
Loss on debt extinguishments |  |  |  |  |  |  |  | 0 |  |
Fair value adjustments, net |  | (1) |  |  | (30) |  |  | (9) | (428) |
Other, net |  | (814) |  |  | (189) |  |  | (376) | 187 |
Interest expense, net of capitalized interest |  | (838) |  |  | (372) |  |  | (1,738) | (1,092) |
Total other income (expense), net |  | (1,653) |  |  | (591) |  |  | (2,123) | (1,333) |
Total |  | 4,354 |  |  | (7,858) |  |  | (758) | (90) |
Income and mining tax (expense) benefit |  | (3,740) |  |  | (489) |  |  | (4,888) | (2,997) |
Income (loss) from continuing operations |  | 614 |  |  | (8,347) |  |  | (5,646) | (3,087) |
Equity income (loss) in consolidated subsidiaries |  | (4) |  |  | (47) |  |  | (634) | (113) |
Income (loss) from discontinued operations |  |  |  |  |  |  |  | 0 | (284) |
NET INCOME (LOSS) |  | 610 |  |  | (8,394) |  |  | (6,280) | (3,484) |
Unrealized gain (loss) on debt securities, net of tax |  | 0 |  |  | 0 |  |  | 0 | 0 |
Reclassification adjustments for impairment of equity securities, net of tax |  | 0 |  |  |  |  |  | 0 |  |
COMPREHENSIVE INCOME (LOSS) |  | 610 |  |  | (8,394) |  |  | (6,280) | (3,484) |
Operating Expenses |  | 110,801 |  |  | 96,556 |  |  | 296,996 | 280,519 |
Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue |  | 82,661 |  |  | 59,506 |  |  | 218,101 | 200,287 |
Pre-development, reclamation, and other |  | 371 |  |  | 1,363 |  |  | 4,967 | 4,663 |
Amortization |  | 23,711 |  |  | 15,868 |  |  | 71,180 | 46,830 |
General and administrative |  | 454 |  |  | 44 |  |  | 1,652 | 55 |
Loss on debt extinguishments |  |  |  |  |  |  |  | 0 |  |
Fair value adjustments, net |  | 0 |  |  | 0 |  |  | 0 |  |
Other, net |  | (3,017) |  |  | (2,599) |  |  | (4,230) | (3,607) |
Interest expense, net of capitalized interest |  | (4,773) |  |  | (3,922) |  |  | (14,221) | (12,459) |
Total other income (expense), net |  | (7,790) |  |  | (6,521) |  |  | (18,451) | (16,066) |
Total |  | (11,703) |  |  | (12,908) |  |  | (68,010) | 15,366 |
Income and mining tax (expense) benefit |  | (286) |  |  | (2,866) |  |  | 17,454 | (16,740) |
Income (loss) from continuing operations |  | (11,989) |  |  | (15,774) |  |  | (50,556) | (1,374) |
Equity income (loss) in consolidated subsidiaries |  | 95 |  |  | (174) |  |  | 355 | (590) |
Income (loss) from discontinued operations |  |  |  |  |  |  |  | 0 | (176) |
NET INCOME (LOSS) |  | (11,894) |  |  | (15,948) |  |  | (50,201) | (2,140) |
Unrealized gain (loss) on debt securities, net of tax |  | 0 |  |  | 0 |  |  | 0 | 0 |
Reclassification adjustments for impairment of equity securities, net of tax |  | 0 |  |  |  |  |  | 0 |  |
COMPREHENSIVE INCOME (LOSS) |  | (11,894) |  |  | (15,948) |  |  | (50,201) | (2,140) |
Operating Expenses |  | 86,574 |  |  | 65,893 |  |  | 267,660 | 168,855 |
Product [Member] |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales | [1] | 140,952 |  |  | 116,857 |  |  | 404,550 | 324,443 |
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 | 0 |
Product [Member] | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 79,367 |  |  | 73,768 |  |  | 220,680 | 219,948 |
Product [Member] | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 61,585 |  |  | 43,089 |  |  | 183,870 | 104,495 |
Mineral, Exploration [Member] |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 5,893 |  |  | 8,157 |  |  | 15,326 | 21,269 |
Loss on debt extinguishments |  | (1,282) |  |  |  |  |  |  |  |
Mineral, Exploration [Member] | Eliminations |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 0 |  |  | 0 |  |  | 0 | 0 |
Loss on debt extinguishments |  | 0 |  |  |  |  |  |  |  |
Mineral, Exploration [Member] | Coeur Mining, Inc. |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 430 |  |  | 383 |  |  | 1,116 | 1,168 |
Loss on debt extinguishments |  | (1,282) |  |  |  |  |  |  |  |
Mineral, Exploration [Member] | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 5,010 |  |  | 2,245 |  |  | 8,219 | 7,289 |
Loss on debt extinguishments |  | 0 |  |  |  |  |  |  |  |
Mineral, Exploration [Member] | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  | 453 |  |  | $ 5,529 |  |  | $ 5,991 | $ 12,812 |
Loss on debt extinguishments |  | $ 0 |  |  |  |  |  |  |  |
[1] | Excludes amortization.

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