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Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | $ 709,598 |  | $ 568,617 |  | $ 554,557 |
Royalty Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 3,280 |  | 6,850 |
Revenues |  | $ 214,585 | $ 159,919 | $ 149,540 | $ 185,554 | $ 139,204 |  | $ 148,762 | $ 156,822 | $ 127,109 | 709,598 |  | 571,897 |  | 561,407 |
Costs applicable to sales |  | 121,982 | 101,559 | 102,229 | 114,490 | 84,903 |  | 84,594 | 81,820 | 84,058 | 440,260 | [1] | 335,375 | [1] | 403,827 | [1]
Amortization |  | 44,722 | 32,401 | 30,733 | 38,693 | 28,625 |  | 26,040 | 35,653 | 26,210 | 146,549 |  | 116,528 |  | 125,953 |
Exploration |  | 7,454 | 9,792 | 7,813 | 5,252 | 5,260 |  | 3,706 | 2,233 | 1,731 | 30,311 |  | 12,930 |  | 11,521 |
Write-downs |  |  |  |  |  |  |  |  |  |  | 0 |  | 4,446 |  | 246,625 |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 52,552 |  | 43,686 |  | 48,840 |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | (9,342) |  | (21,365) |  | 15,916 |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | (864) |  | (11,581) |  | 5,202 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (16,440) |  | (36,896) |  | (44,978) |
Other, net |  |  |  |  |  |  |  |  |  |  | 26,643 |  | 98 |  | (17,667) |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | (28,998) |  | 33,247 |  | 29,075 |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  | 14,349 | (11,728) | (9,995) | 18,299 | (10,328) |  | 46,123 | 8,280 | (21,640) | 10,925 |  | 22,435 |  | (287,811) |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  | (6,724) | (4,924) | (960) | 364 | 2,020 |  | 23,436 | 6,217 | 1,244 | (12,244) |  | 32,917 |  | (79,372) |
Assets, Net | [2] | 1,344,553 |  |  |  | 1,045,722 |  |  |  |  | 1,344,553 |  | 1,045,722 |  | 1,012,169 |
Capital expenditures |  | 47,054 | $ 28,982 | $ 37,107 | $ 23,591 | 28,134 |  | $ 22,626 | $ 21,971 | $ 21,651 | 136,734 |  | 94,382 |  | 88,973 |
Palmarejo [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 274,809 |  | 141,273 |  | 169,133 |
Royalty Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  | 141,273 |  | 169,133 |
Costs applicable to sales | [1] |  |  |  |  |  |  |  |  |  | 146,176 |  | 80,820 |  | 138,476 |
Amortization |  |  |  |  |  |  |  |  |  |  | 73,744 |  | 36,599 |  | 32,423 |
Exploration |  |  |  |  |  |  |  |  |  |  | 11,924 |  | 5,063 |  | 4,533 |
Write-downs |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 224,507 |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 1,263 |  | 1,213 |  | 1,293 |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | 0 |  | (5,814) |  | 3,160 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (487) |  | 1,187 |  | 4,269 |
Other, net |  |  |  |  |  |  |  |  |  |  | (851) |  | (12,125) |  | (10,968) |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | (24,330) |  | (45,085) |  | (37,597) |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 16,034 |  | 43,537 |  | (206,579) |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Assets, Net | [2] | 377,621 |  |  |  | 436,642 |  |  |  |  | 377,621 |  | 436,642 |  | 406,648 |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 29,902 |  | 35,810 |  | 35,991 |
Rochester [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 152,680 |  | 139,945 |  | 143,930 |
Royalty Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  | 139,945 |  | 143,930 |
Costs applicable to sales | [1] |  |  |  |  |  |  |  |  |  | 107,921 |  | 89,726 |  | 103,994 |
Amortization |  |  |  |  |  |  |  |  |  |  | 22,306 |  | 21,838 |  | 23,906 |
Exploration |  |  |  |  |  |  |  |  |  |  | 1,352 |  | 841 |  | 1,324 |
Write-downs |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 3,394 |  | 2,801 |  | 2,948 |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | (864) |  | (4,133) |  | 818 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (496) |  | 664 |  | 748 |
Other, net |  |  |  |  |  |  |  |  |  |  | 2,193 |  | (3,859) |  | (13) |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | (1,028) |  | 2,785 |  | 1,497 |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 17,512 |  | 13,298 |  | 10,318 |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Assets, Net | [2] | 239,223 |  |  |  | 219,009 |  |  |  |  | 239,223 |  | 219,009 |  | 190,714 |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 40,874 |  | 16,446 |  | 25,330 |
Silvertip [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Costs applicable to sales | [1] |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Amortization |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Exploration |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 153 |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (2,212) |  |  |  |  |
Other, net |  |  |  |  |  |  |  |  |  |  | 1,142 |  |  |  |  |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | (932) |  |  |  |  |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | (2,155) |  |  |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |
Assets, Net | [2] | 339,369 |  |  |  |  |  |  |  |  | 339,369 |  |  |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 17,684 |  |  |  |  |
Kensington [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 154,469 |  | 146,593 |  | 148,710 |
Royalty Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  | 146,593 |  | 148,710 |
Costs applicable to sales | [1] |  |  |  |  |  |  |  |  |  | 116,096 |  | 96,731 |  | 105,640 |
Amortization |  |  |  |  |  |  |  |  |  |  | 36,022 |  | 34,787 |  | 42,240 |
Exploration |  |  |  |  |  |  |  |  |  |  | 8,604 |  | 3,487 |  | 2,596 |
Write-downs |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 1,412 |  | 1,038 |  | 1,301 |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (413) |  | 128 |  | 218 |
Other, net |  |  |  |  |  |  |  |  |  |  | (922) |  | (25) |  | 7 |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | (9,000) |  | 10,397 |  | (3,278) |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Assets, Net | [2] | 212,588 |  |  |  | 199,232 |  |  |  |  | 212,588 |  | 199,232 |  | 197,873 |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 36,248 |  | 36,826 |  | 23,834 |
Wharf [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 125,901 |  | 136,678 |  | 84,052 |
Royalty Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  | 136,678 |  | 84,052 |
Costs applicable to sales | [1] |  |  |  |  |  |  |  |  |  | 69,322 |  | 66,379 |  | 52,197 |
Amortization |  |  |  |  |  |  |  |  |  |  | 13,012 |  | 20,621 |  | 16,378 |
Exploration |  |  |  |  |  |  |  |  |  |  | 320 |  | 2 |  | 134 |
Write-downs |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 2,468 |  | 2,238 |  | 1,717 |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (66) |  | 69 |  | 0 |
Other, net |  |  |  |  |  |  |  |  |  |  | 172 |  | 17 |  | 143 |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | (3,936) |  | 4,293 |  | 857 |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 36,949 |  | 43,093 |  | 12,912 |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Assets, Net | [2] | 104,010 |  |  |  | 105,901 |  |  |  |  | 104,010 |  | 105,901 |  | 113,305 |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 8,844 |  | 4,812 |  | 3,211 |
Other Mining Properties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial information relating to reporting segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  | 1,739 |  | 4,128 |  | 8,732 |
Royalty Revenue |  |  |  |  |  |  |  |  |  |  |  |  | 3,280 |  | 6,850 |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  | 7,408 |  | 15,582 |
Costs applicable to sales | [1] |  |  |  |  |  |  |  |  |  | 745 |  | 1,719 |  | 3,520 |
Amortization |  |  |  |  |  |  |  |  |  |  | 1,465 |  | 2,683 |  | 11,006 |
Exploration |  |  |  |  |  |  |  |  |  |  | 8,111 |  | 3,537 |  | 2,934 |
Write-downs |  |  |  |  |  |  |  |  |  |  |  |  | 4,446 |  | 22,118 |
Other operating expenses |  |  |  |  |  |  |  |  |  |  | 43,862 |  | 36,396 |  | 41,581 |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  |  | (9,342) |  | (21,365) |  | 15,916 |
Fair value adjustments, net, pretax |  |  |  |  |  |  |  |  |  |  | 0 |  | (1,634) |  | 1,224 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (12,766) |  | 34,848 |  | 39,743 |
Other, net |  |  |  |  |  |  |  |  |  |  | 24,909 |  | 16,090 |  | (6,836) |
Income and mining tax benefit (expense) |  |  |  |  |  |  |  |  |  |  | 1,228 |  | 4,760 |  | 6,168 |
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | (48,415) |  | (87,890) |  | (101,184) |
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  |  |  | (12,244) |  | 32,917 |  | (79,372) |
Assets, Net |  | $ 71,742 |  |  |  | $ 84,938 | [2] |  |  |  | 71,742 |  | 84,938 | [2] | 103,629 | [2]
Capital expenditures |  |  |  |  |  |  |  |  |  |  | $ 3,182 |  | $ 488 |  | $ 607 |
[1] | Excludes amortization.
[2] | Segment assets include receivables, prepaids, inventories, property, plant and equipment, and mineral interest

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