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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Net income (loss) | $ (149,226) | $ 102,121 | $ (696,029) | $ 211,588
Net unrealized gain on derivative instruments qualifying as hedges: |  |  |  |
Reclassification adjustment for loss on derivative instruments included in net income (loss), net of tax of $60 and $60 for the three months ended and $181 and $181 for the nine months ended in 2015 and 2014, respectively | 100 | 100 | 299 | 299
Reclassification adjustment for (gain) loss on derivative instruments included in income (loss) from discontinued operations, net of tax of $0 and $(10) for the three months ended and $0 and $83 for the nine months ended in 2015 and 2014, respectively | 0 | (18) | 0 | 140
Net unrealized gain on derivative instruments qualifying as hedges | 100 | 82 | 299 | 439
Amortization of postretirement liability losses included in net periodic benefit cost (credit), net of tax of $233 and $159 for the three months ended and $881 and $477 for the nine months ended in 2015 and 2014, respectively | 382 | 261 | 1,341 | 781
Foreign currency translation adjustment: |  |  |  |
Foreign currency translation adjustment recognized during the period, net of tax of $(44) and $(89) for the three months ended and $(107) and $(36) for the nine months ended in 2015 and 2014, respectively | (73) | (146) | (176) | (58)
Reclassification adjustment for loss on foreign currency translation adjustment included in net income (loss), net of tax of $0 and $0 for the three months ended and $491 and $0 for the nine months ended in 2015 and 2014, respectively | 0 | 0 | 802 | 0
Foreign currency translation adjustment | (73) | (146) | 626 | (58)
Net unrealized gain (loss) on available-for-sale investments: |  |  |  |
Net unrealized loss on available-for-sale investments arising during the period, net of tax of $(19) and $(33) for the three months ended and $(57) and $(48) for the nine months ended in 2015 and 2014, respectively | (35) | (62) | (105) | (89)
Reclassification adjustment for loss on available-for-sale investments included in net income (loss), net of tax of $15 and $16 for the three months ended and $53 and $54 for the nine months ended in 2015 and 2014, respectively | 28 | 31 | 98 | 100
Net unrealized gain (loss) on available-for-sale investments | (7) | (31) | (7) | 11
Other comprehensive income | 402 | 166 | 2,259 | 1,173
Comprehensive income (loss) | (148,824) | 102,287 | (693,770) | 212,761
Comprehensive loss attributable to noncontrolling interest | (9,778) | (1,088) | (21,060) | (2,390)
Comprehensive income (loss) attributable to common stockholders | $ (139,046) | $ 103,375 | $ (672,710) | $ 215,151

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