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Supplemental Guarantor Information Condensed Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 195,040 | $ 199,469 | $ 162,123 | $ 154,870 | $ 143,855 | $ 148,795 | $ 169,987 | $ 163,267 | $ 711,502 |  | $ 625,904 |  | $ 709,598 |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | 250,814 |  | 0 |  | 0 |
Pre-development, reclamation, and other |  |  |  |  |  |  |  |  | 18,421 |  | 20,043 |  | 18,936 |
Amortization | 48,118 | 45,678 | 43,204 | 41,876 | 37,053 | 31,184 | 29,459 | 30,777 | 178,876 |  | 128,473 |  | 146,549 |
General and administrative |  |  |  |  |  |  |  |  | 34,493 |  | 31,345 |  | 33,616 |
Loss on debt extinguishments |  |  |  |  |  |  |  |  | (1,281) |  | 0 |  | (9,342) |
Fair value adjustments, net |  |  |  |  |  |  |  |  | 16,030 |  | 3,638 |  | (864) |
Other, net |  |  |  |  |  |  |  |  | (3,193) |  | (24,705) |  | 26,643 |
Interest expense, net of capitalized interest |  |  |  |  |  |  |  |  | (24,771) |  | (24,364) |  | (16,440) |
Total other income (expense), net |  |  |  |  |  |  |  |  | (13,215) |  | (45,431) |  | (3) |
Total |  |  |  |  |  |  |  |  | (358,025) |  | (65,735) |  | 39,923 |
Income and mining tax (expense) benefit |  |  |  |  |  |  |  |  | 11,129 |  | 16,780 |  | (28,998) |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (346,896) |  | (48,955) |  | 10,925 |
Equity income (loss) in consolidated subsidiaries |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income (loss) from discontinued operations | 0 | 0 | 0 | 5,693 | 0 | 0 | 0 | 550 | 5,693 |  | 550 |  | (12,244) |
NET INCOME (LOSS) | (270,961) | (14,277) | (36,764) | (19,201) | 468 | (53,044) | 2,930 | 1,241 | (341,203) |  | (48,405) |  | (1,319) |
Unrealized gain (loss) on debt securities, net of tax |  |  |  |  |  |  |  |  | 59 |  | 26 |  | 3,227 |
Reclassification adjustments for impairment of equity securities, net of tax |  |  |  |  |  |  |  |  | (136) |  | 0 |  | 0 |
Reclassification adjustments for impairment of equity securities |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 426 |
Reclassification adjustments for realized gain (loss) on sale of equity securities, net of tax |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 1,354 |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  | (77) |  | 26 |  | 5,007 |
COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  | (341,280) |  | (48,379) |  | 3,688 |
Operating Expenses |  |  |  |  |  |  |  |  | 1,056,312 |  | 646,208 |  | 669,672 |
Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Pre-development, reclamation, and other |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Amortization |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
General and administrative |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Loss on debt extinguishments |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
Fair value adjustments, net |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Other, net |  |  |  |  |  |  |  |  | (17,139) |  | (15,457) |  | (7,726) |
Interest expense, net of capitalized interest |  |  |  |  |  |  |  |  | 17,139 |  | 15,457 |  | 7,726 |
Total other income (expense), net |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Total |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income and mining tax (expense) benefit |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Equity income (loss) in consolidated subsidiaries |  |  |  |  |  |  |  |  | 324,068 |  | (2,911) |  | (43,928) |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
NET INCOME (LOSS) |  |  |  |  |  |  |  |  | 324,068 |  | (2,911) |  | (43,928) |
Unrealized gain (loss) on debt securities, net of tax |  |  |  |  |  |  |  |  | 0 |  | 0 |  | (915) |
Reclassification adjustments for impairment of equity securities, net of tax |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Reclassification adjustments for impairment of equity securities |  |  |  |  |  |  |  |  |  |  |  |  | (426) |
Reclassification adjustments for realized gain (loss) on sale of equity securities, net of tax |  |  |  |  |  |  |  |  |  |  |  |  | (486) |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | (1,827) |
COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  | 324,068 |  | (2,911) |  | (45,755) |
Operating Expenses |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Coeur Mining, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Pre-development, reclamation, and other |  |  |  |  |  |  |  |  | 346 |  | 1,246 |  | 4,705 |
Amortization |  |  |  |  |  |  |  |  | 876 |  | 940 |  | 1,157 |
General and administrative |  |  |  |  |  |  |  |  | 31,913 |  | 30,868 |  | 33,379 |
Loss on debt extinguishments |  |  |  |  |  |  |  |  | (1,281) |  |  |  | (9,342) |
Fair value adjustments, net |  |  |  |  |  |  |  |  | 16,039 |  | 4,056 |  | 0 |
Other, net |  |  |  |  |  |  |  |  | 18,993 |  | (403) |  | 21,254 |
Interest expense, net of capitalized interest |  |  |  |  |  |  |  |  | (20,774) |  | (21,563) |  | (14,657) |
Total other income (expense), net |  |  |  |  |  |  |  |  | 12,977 |  | (17,910) |  | (2,745) |
Total |  |  |  |  |  |  |  |  | (21,650) |  | (52,460) |  | (43,578) |
Income and mining tax (expense) benefit |  |  |  |  |  |  |  |  | (1,518) |  | (548) |  | 2,170 |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (23,168) |  | (53,008) |  | (41,408) |
Equity income (loss) in consolidated subsidiaries |  |  |  |  |  |  |  |  | (323,728) |  | 3,593 |  | 40,089 |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  | 5,693 |  | 1,010 |  | 0 |
NET INCOME (LOSS) |  |  |  |  |  |  |  |  | (341,203) |  | (48,405) |  | (1,319) |
Unrealized gain (loss) on debt securities, net of tax |  |  |  |  |  |  |  |  | 59 |  | 26 |  | 3,227 |
Reclassification adjustments for impairment of equity securities, net of tax |  |  |  |  |  |  |  |  | (136) |  |  |  |  |
Reclassification adjustments for impairment of equity securities |  |  |  |  |  |  |  |  |  |  |  |  | 426 |
Reclassification adjustments for realized gain (loss) on sale of equity securities, net of tax |  |  |  |  |  |  |  |  |  |  |  |  | 1,354 |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | 5,007 |
COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  | (341,280) |  | (48,379) |  | 3,688 |
Operating Expenses |  |  |  |  |  |  |  |  | 34,627 |  | 34,550 |  | 40,833 |
Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 414,548 |  | 371,248 |  | 433,050 |
Pre-development, reclamation, and other |  |  |  |  |  |  |  |  | 11,204 |  | 11,351 |  | 7,497 |
Amortization |  |  |  |  |  |  |  |  | 81,759 |  | 61,489 |  | 71,340 |
General and administrative |  |  |  |  |  |  |  |  | 808 |  | 398 |  | 28 |
Loss on debt extinguishments |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
Fair value adjustments, net |  |  |  |  |  |  |  |  | (9) |  | (418) |  | (864) |
Other, net |  |  |  |  |  |  |  |  | (1,106) |  | 617 |  | 2,936 |
Interest expense, net of capitalized interest |  |  |  |  |  |  |  |  | (2,591) |  | (1,479) |  | (975) |
Total other income (expense), net |  |  |  |  |  |  |  |  | (3,706) |  | (1,280) |  | 1,097 |
Total |  |  |  |  |  |  |  |  | 4,355 |  | 2,194 |  | 48,253 |
Income and mining tax (expense) benefit |  |  |  |  |  |  |  |  | (3,750) |  | (1,926) |  | (5,758) |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | 605 |  | 268 |  | 42,495 |
Equity income (loss) in consolidated subsidiaries |  |  |  |  |  |  |  |  | (10,100) |  | (608) |  | (577) |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  | 0 |  | (284) |  | 0 |
NET INCOME (LOSS) |  |  |  |  |  |  |  |  | (9,495) |  | (624) |  | 41,918 |
Unrealized gain (loss) on debt securities, net of tax |  |  |  |  |  |  |  |  | 0 |  |  |  | 915 |
Reclassification adjustments for impairment of equity securities, net of tax |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Reclassification adjustments for impairment of equity securities |  |  |  |  |  |  |  |  |  |  |  |  | 426 |
Reclassification adjustments for realized gain (loss) on sale of equity securities, net of tax |  |  |  |  |  |  |  |  |  |  |  |  | 486 |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | 1,827 |
COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  | (9,495) |  | (624) |  | 43,745 |
Operating Expenses |  |  |  |  |  |  |  |  | 406,487 |  | 367,774 |  | 385,894 |
Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 296,954 |  | 254,656 |  | 276,548 |
Pre-development, reclamation, and other |  |  |  |  |  |  |  |  | 6,871 |  | 7,446 |  | 6,734 |
Amortization |  |  |  |  |  |  |  |  | 96,241 |  | 66,044 |  | 74,052 |
General and administrative |  |  |  |  |  |  |  |  | 1,772 |  | 79 |  | 209 |
Loss on debt extinguishments |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
Fair value adjustments, net |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
Other, net |  |  |  |  |  |  |  |  | (3,941) |  | (9,462) |  | 10,179 |
Interest expense, net of capitalized interest |  |  |  |  |  |  |  |  | (18,545) |  | (16,779) |  | (8,534) |
Total other income (expense), net |  |  |  |  |  |  |  |  | (22,486) |  | (26,241) |  | 1,645 |
Total |  |  |  |  |  |  |  |  | (340,730) |  | (15,469) |  | 35,248 |
Income and mining tax (expense) benefit |  |  |  |  |  |  |  |  | 16,397 |  | 19,254 |  | (25,410) |
Income (loss) from continuing operations |  |  |  |  |  |  |  |  | (324,333) |  | 3,785 |  | 9,838 |
Equity income (loss) in consolidated subsidiaries |  |  |  |  |  |  |  |  | 9,760 |  | (74) |  | 4,416 |
Income (loss) from discontinued operations |  |  |  |  |  |  |  |  | 0 |  | (176) |  | (12,244) |
NET INCOME (LOSS) |  |  |  |  |  |  |  |  | (314,573) |  | 3,535 |  | 2,010 |
Unrealized gain (loss) on debt securities, net of tax |  |  |  |  |  |  |  |  | 0 |  |  |  | 0 |
Reclassification adjustments for impairment of equity securities, net of tax |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Reclassification adjustments for impairment of equity securities |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Reclassification adjustments for realized gain (loss) on sale of equity securities, net of tax |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
COMPREHENSIVE INCOME (LOSS) |  |  |  |  |  |  |  |  | (314,573) |  | 3,535 |  | 2,010 |
Operating Expenses |  |  |  |  |  |  |  |  | 615,198 |  | 243,884 |  | 242,945 |
Product |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales | 146,631 | 140,952 | 131,948 | 131,650 | 116,507 | 116,857 | 108,246 | 99,340 | 551,181 | [1] | 440,950 | [1] | 440,260 | [1]
Product | Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 0 |  | 0 | [1] | 0 | [1]
Product | Coeur Mining, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Product | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 300,496 |  | 285,242 |  | 293,340 |
Product | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 250,685 |  | 155,708 |  | 146,920 |
Mineral, Exploration |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales | $ 7,201 | $ 5,893 | $ 5,719 | $ 3,714 | $ 4,128 | $ 8,157 | $ 6,429 | $ 6,683 | 22,527 |  | 25,397 |  | 30,311 |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | 250,814 |  |  |  |  |
Mineral, Exploration | Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Mineral, Exploration | Coeur Mining, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 1,492 |  | 1,496 |  | 1,592 |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Mineral, Exploration | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 12,220 |  | 9,294 |  | 13,689 |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Mineral, Exploration | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs applicable to sales |  |  |  |  |  |  |  |  | 8,815 |  | $ 14,607 |  | $ 15,030 |
Impairment of Long-Lived Assets Held-for-use |  |  |  |  |  |  |  |  | $ 250,814 |  |  |  |  |
[1] | Excludes amortization.

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