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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Net income (loss) | $ (237,358) | $ 53,327 | $ (546,803) | $ 109,466
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 $121 and $121 for the six months ended in 2015 and 2014, respectively | 100 | 100 | 199 | 199
Reclassification adjustment for (gain) loss on derivative instruments included in income (loss) from discontinued operations, net of tax of $0 and $(50) for the three months ended and $0 and $93 for the six months ended in 2015 and 2014, respectively | 0 | (87) | 0 | 158
Net unrealized gain on derivative instruments qualifying as hedges | 100 | 13 | 199 | 357
Amortization of postretirement liability losses included in net periodic benefit cost, net of tax of $420 and $150 for the three months ended and $649 and $318 for the six months ended in 2015 and 2014, respectively | 584 | 245 | 959 | 520
Foreign currency translation adjustment: |  |  |  |
Foreign currency translation adjustment recognized during the period, net of tax of $6 and $26 for the three months ended and $(63) and $54 for the six months ended in 2015 and 2014, respectively | 9 | 42 | (103) | 88
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 six months ended in 2015 and 2014, respectively | 0 | 0 | 802 | 0
Foreign currency translation adjustment | 9 | 42 | 699 | 88
Net unrealized gain (loss) on available-for-sale investments: |  |  |  |
Net unrealized gain (loss) on available-for-sale investments arising during the period, net of tax of $(23) and $4 for the three months ended and $(34) and $5 for the six months ended in 2015 and 2014, respectively | (43) | 8 | (64) | 10
Reclassification adjustment for loss on available-for-sale investments included in net income (loss), net of tax of $15 and $17 for the three months ended and $34 and $17 for the six months ended in 2015 and 2014, respectively | 28 | 32 | 64 | 32
Net unrealized gain (loss) on available-for-sale investments | (15) | 40 | 0 | 42
Other comprehensive income | 678 | 340 | 1,857 | 1,007
Comprehensive income (loss) | (236,680) | 53,667 | (544,946) | 110,473
Comprehensive loss attributable to noncontrolling interest | (7,754) | (779) | (11,282) | (1,302)
Comprehensive income (loss) attributable to common stockholders | $ (228,926) | $ 54,446 | $ (533,664) | $ 111,775

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