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Segment Reporting (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
Financial information relating to reporting segments |  |  |  |  |  |
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 |
Exploration |  | 2,112 | 6,587 | 9,957 | 15,957 |
Fair value adjustments, net |  | 5,786 | 16,105 | 3,657 | (3,611) |
Interest expense, net |  | (12,446) | (11,616) | (33,945) | (36,980) |
Other, net |  | (8,893) | (1,303) | (14,257) | (6,927) |
Income and mining tax benefit (expense) |  | 8,260 | 16,583 | 8,451 | 18,650 |
Net income (loss) |  | (14,219) | 3,466 | (64,185) | (76,846) |
Assets, Net |  | 1,458,659 |  | 1,458,659 |  | $ 1,084,257
Capital expenditures |  | 23,861 | 16,784 | 65,158 | 44,076 |
Palmarejo [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 49,187 | 61,376 | 127,455 | 201,809 |
Royalties |  | 0 | 0 | 0 | 0 |
Revenue |  | 49,187 | 61,376 | 127,455 | 201,809 |
Costs applicable to sales |  | 34,093 | 45,988 | 98,695 | 139,113 |
Amortization |  | 8,617 | 16,493 | 24,997 | 53,196 |
Exploration |  | 1,087 | 2,615 | 4,047 | 5,257 |
Other operating expenses |  | 303 | 340 | 940 | 962 |
Fair value adjustments, net |  | 2,998 | 8,771 | 1,882 | (6,454) |
Interest expense, net |  | (928) | (2,126) | (3,112) | (7,721) |
Other, net |  | (7,870) | 284 | (9,478) | (2,489) |
Income and mining tax benefit (expense) |  | (10,370) | 11,562 | (9,836) | 16,734 |
Net income (loss) |  | 9,657 | 14,431 | (2,096) | 3,351 |
Assets, Net |  | 653,501 | 1,111,829 | 653,501 | 1,111,829 |
Capital expenditures |  | 10,514 | 5,857 | 30,421 | 15,188 |
San Bartolome [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 17,391 | 28,350 | 62,304 | 84,983 |
Royalties |  | 0 | 0 | 0 | 0 |
Revenue |  | 17,391 | 28,350 | 62,304 | 84,983 |
Costs applicable to sales |  | 17,483 | 20,447 | 55,767 | 60,042 |
Amortization |  | 3,526 | 5,117 | 13,487 | 14,430 |
Exploration |  | 54 | (19) | 132 | 63 |
Other operating expenses |  | 1,059 | 180 | 1,544 | 515 |
Fair value adjustments, net |  | 0 | 4,345 | 0 | 0 |
Interest expense, net |  | (100) | (10) | (674) | (42) |
Other, net |  | 347 | 39 | 1,219 | 1,957 |
Income and mining tax benefit (expense) |  | 1,029 | (2,969) | 2,240 | (7,937) |
Net income (loss) |  | (5,513) | 229 | (10,322) | 3,911 |
Assets, Net |  | 165,931 | 304,644 | 165,931 | 304,644 |
Capital expenditures |  | 1,786 | 2,783 | 3,729 | 5,935 |
Kensington [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 30,466 | 45,922 | 116,971 | 111,000 |
Royalties |  | 0 | 0 | 0 | 0 |
Revenue |  | 30,466 | 45,922 | 116,971 | 111,000 |
Costs applicable to sales |  | 24,973 | 34,668 | 81,844 | 86,417 |
Amortization |  | 8,499 | 12,887 | 32,738 | 35,162 |
Exploration |  | 217 | 2,638 | 2,311 | 5,318 |
Other operating expenses |  | 254 | 202 | 1,015 | 591 |
Fair value adjustments, net |  | 0 | 0 | 0 | 0 |
Interest expense, net |  | (51) | (70) | (172) | (145) |
Other, net |  | 1 | 0 | (16) | 4 |
Income and mining tax benefit (expense) |  | (406) | 0 | 587 | 0 |
Net income (loss) |  | (3,122) | (4,543) | (1,712) | (16,629) |
Assets, Net |  | 193,712 | 315,959 | 193,712 | 315,959 |
Capital expenditures |  | 5,522 | 3,610 | 14,380 | 12,310 |
La Preciosa [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Fair value adjustments, net |  |  | 0 |  |  |
Other, net |  |  | 583 |  |  |
Rochester [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 34,638 | 32,362 | 115,010 | 87,710 |
Royalties |  | 0 | 0 | 0 | 0 |
Revenue |  | 34,638 | 32,362 | 115,010 | 87,710 |
Costs applicable to sales |  | 25,436 | 23,718 | 81,221 | 62,806 |
Amortization |  | 6,731 | 5,359 | 18,962 | 14,835 |
Exploration |  | 49 | 127 | 1,272 | 2,039 |
Other operating expenses |  | 742 | (87) | 2,190 | 2,102 |
Fair value adjustments, net |  | 1,752 |  | 596 | 1,835 |
Interest expense, net |  | (168) | (250) | (598) | (515) |
Other, net |  | 1 |  | (38) | 90 |
Income and mining tax benefit (expense) |  | 1,053 | (210) | 1,753 | (629) |
Net income (loss) |  | 2,212 | 7,169 | 9,573 | 6,709 |
Assets, Net |  | 192,348 | 208,284 | 192,348 | 208,284 |
Capital expenditures |  | 5,281 | 4,194 | 14,451 | 9,110 |
Coeur Capital [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 1,264 | 2,367 | 6,292 | 7,227 |
Royalties |  | 1,620 | 561 | 5,379 | 2,404 |
Revenue |  | 2,884 | 2,928 | 11,671 | 9,631 |
Costs applicable to sales |  | 475 | 1,089 | 2,460 | 3,114 |
Amortization |  | 1,983 | 1,563 | 6,753 | 4,685 |
Exploration |  | (362) | 150 | (212) | 462 |
Other operating expenses |  | (38) | 342 | (8) | 868 |
Fair value adjustments, net |  | 0 | 0 | 0 | 0 |
Interest expense, net |  | 0 | 0 | 0 | 0 |
Other, net |  | (455) | (1,480) | (2,904) | (4,988) |
Income and mining tax benefit (expense) |  | (291) | 214 | (266) | (304) |
Net income (loss) |  | 662 | (1,482) | 40 | (4,790) |
Assets, Net |  | 51,553 | 67,934 | 51,553 | 67,934 |
Capital expenditures |  | 0 | 0 | 0 | 0 |
Other Mining Properties [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 0 | 0 | 0 | 0 |
Royalties |  | 0 | 0 | 0 | 0 |
Revenue |  | 0 | 0 | 0 | 0 |
Costs applicable to sales |  | 0 | 0 | 0 | 0 |
Amortization |  | 499 | 566 | 1,490 | 1,526 |
Exploration |  | 1,067 | 1,076 | 2,407 | 2,818 |
Other operating expenses |  | 8,795 | 11,782 | 31,078 | 46,790 |
Fair value adjustments, net |  | 1,036 | 2,989 | 1,179 | 1,008 |
Interest expense, net |  | (11,199) | (9,160) | (29,389) | (28,557) |
Other, net |  | (970) | (729) | (3,148) | (1,501) |
Income and mining tax benefit (expense) |  | 182 | 7,986 | 3,424 | 10,786 |
Net income (loss) |  | (21,310) | (12,338) | (62,909) | (69,398) |
Assets, Net |  | 76,860 | 539,134 | 76,860 | 539,134 |
Capital expenditures |  | 93 | 340 | 218 | 1,533 |
Wharf [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 27,986 |  | 48,359 |  |
Royalties |  | 0 |  | 0 |  |
Revenue |  | 27,986 |  | 48,359 |  |
Costs applicable to sales |  | 17,777 |  | 34,410 |  |
Amortization |  | 5,642 |  | 9,133 |  |
Exploration |  | 0 |  | 0 |  |
Other operating expenses |  | 517 |  | 1,188 |  |
Fair value adjustments, net |  | 0 |  | 0 |  |
Interest expense, net |  | 0 |  | 0 |  |
Other, net |  | 53 |  | 108 |  |
Income and mining tax benefit (expense) |  | 907 |  | 495 |  |
Net income (loss) |  | 3,195 |  | 3,241 |  |
Assets, Net |  | 124,754 |  | 124,754 |  |
Capital expenditures |  | 665 |  | 1,959 |  |
Total [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Metal sales |  | 160,932 | 170,377 | 476,391 | 492,729 |
Royalties |  | 1,620 | 561 | 5,379 | 2,404 |
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 operating expenses |  | 11,632 | 12,759 | 37,947 | 51,828 |
Other, net |  | (8,893) | (1,303) | (14,257) | (6,927) |
Net income (loss) |  | (14,219) | 3,466 |  | (76,846) |
Assets, Net |  |  | 2,547,784 |  | 2,547,784 |
Capital expenditures |  | 23,861 | 16,784 | 65,158 | 44,076 |
United States [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Revenue |  | 93,091 | 78,284 | 280,340 | 198,710 |
Mexico [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Revenue |  | 50,170 | 61,684 | 129,753 | 202,851 |
San Bartolome [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Revenue |  | 17,391 |  |  |  |
BOLIVIA |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Revenue |  |  | 28,350 | 62,304 | 84,983 |
Australia [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Revenue |  | 1,264 | 2,367 | 6,292 | 7,227 |
Other Foreign Countries [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Revenue |  | $ 636 | $ 253 | 3,081 | $ 1,362 |
Accumulated Deficit [Member] |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |
Net income (loss) |  |  |  | $ (64,185) |  |
[1] | Excludes amortization.

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