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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Statement of Comprehensive Income [Abstract] |  |  |
Revenue |  | $ 148,387 | $ 152,956
COSTS AND EXPENSES |  |  |
Costs applicable to sales | [1] | 101,555 | 115,062
Amortization |  | 27,964 | 33,090
General and administrative |  | 8,276 | 8,834
Exploration |  | 1,731 | 4,266
Write-downs |  | 4,446 | 0
Pre-development, reclamation, and other |  | 4,204 | 6,763
Total costs and expenses |  | 148,176 | 168,015
OTHER INCOME (EXPENSE), NET |  |  |
Fair value adjustments, net |  | (8,695) | (4,884)
Interest expense, net of capitalized interest |  | (11,120) | (10,765)
Other, net |  | 1,314 | (2,511)
Total other income (expense), net |  | (18,501) | (18,160)
Income (loss) before income and mining taxes |  | (18,290) | (33,219)
Income and mining tax benefit (expense) |  | (2,106) | (68)
NET INCOME (LOSS) |  | (20,396) | (33,287)
OTHER COMPREHENSIVE INCOME (LOSS), Net of Tax: |  |  |
Unrealized gain (loss) on equity securities, net of tax of $(1,011) and $578 for the three months ended March 31, 2016 and 2015, respectively |  | 1,043 | (915)
Reclassification adjustments for impairment of equity securities, net of tax of $(586) for the three months ended March 31, 2015 |  | 0 | 928
Reclassification adjustments for realized loss on sale of equity securities |  | 588 | 0
Other comprehensive income (loss) |  | 1,631 | 13
COMPREHENSIVE INCOME (LOSS) |  | $ (18,765) | $ (33,274)
NET INCOME (LOSS) PER SHARE |  |  |
Basic (in dollars per share) |  | $ (0.14) | $ (0.32)
Diluted (in dollars per share) |  | $ (0.14) | $ (0.32)
[1] | Excludes amortization.

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