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Components of accumulated other comprehensive loss (Tables) | 6 Months Ended
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Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated balances for each component of AOCI |
| June 30, 2015 | December 31, 2014
Defined benefit plan liabilities | $ | (108,366 | ) | $ | (128,664 | )
Unrealized loss on financial instruments | (1,342 | ) | (1,249 | )
Other comprehensive loss before income tax effect | (109,708 | ) | (129,913 | )
Income tax effect (1) | 11,466 |  | 12,231 |
Accumulated other comprehensive loss | $ | (98,242 | ) | $ | (117,682 | )
(1)The allocation of the income tax effect to the components of other comprehensive income is as follows:
| June 30, 2015 | December 31, 2014
Defined benefit plan liabilities | $ | 12,031 |  | $ | 12,812 |
Unrealized loss on financial instruments | (565 | ) | (581 | )
The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCI"):
| Defined benefit plan and other postretirement liabilities | Equity in investee other comprehensive income | Unrealized loss on financial instruments | Total, net of tax
Balance, April 1, 2015 | $ | (115,735 | ) | $ | — |  | $ | (1,869 | ) | $ | (117,604 | )
Other comprehensive income before reclassifications (1) | 18,042 |  | — |  | — |  | 18,042 |
Net amount reclassified to net loss | 1,358 |  | — |  | (38 | ) | 1,320 |
Balance, June 30, 2015 | $ | (96,335 | ) | $ | — |  | $ | (1,907 | ) | $ | (98,242 | )
Balance, April 1, 2014 | $ | (77,766 | ) | $ | (12,249 | ) | $ | (1,718 | ) | $ | (91,733 | )
Other comprehensive income (loss) before reclassifications | 440 |  | — |  | — |  | 440 |
Net amount reclassified to net income | (517 | ) | (17 | ) | (37 | ) | (571 | )
Balance, June 30, 2014 | $ | (77,843 | ) | $ | (12,266 | ) | $ | (1,755 | ) | $ | (91,864 | )
Balance, December 31, 2014 | $ | (115,852 | ) | $ | — |  | $ | (1,830 | ) | $ | (117,682 | )
Other comprehensive income before reclassifications (1) | 18,042 |  | — |  | — |  | 18,042 |
Net amount reclassified to net income | 1,475 |  | — |  | (77 | ) | 1,398 |
Balance, June 30, 2015 | $ | (96,335 | ) | $ | — |  | $ | (1,907 | ) | $ | (98,242 | )
Balance, December 31, 2013 | $ | (77,921 | ) | $ | (12,232 | ) | $ | (1,679 | ) | $ | (91,832 | )
Other comprehensive income (loss) before reclassifications | 440 |  | — |  | — |  | 440 |
Net amount reclassified to net loss | (362 | ) | (34 | ) | (76 | ) | (472 | )
Balance, June 30, 2014 | $ | (77,843 | ) | $ | (12,266 | ) | $ | (1,755 | ) | $ | (91,864 | )
(1) | The gain in other comprehensive income before reclassifications is due to a plan remeasurement related to our labor negotiations, census and other actuarial adjustments.
Reclassification out of AOCI | Reclassifications out of AOCI were included in the consolidated statements of operations as follows:
|  | For the three months ended June 30, | For the six months ended June 30,
AOCI Components | Location | 2015 | 2014 | 2015 | 2014
Defined benefit plan and other postretirement liabilities | Cost of goods sold | $ | 1,612 |  | $ | 25 |  | $ | 1,753 |  | $ | 616 |
| Selling, general and administrative expenses | 136 |  | 17 |  | 503 |  | 285 |
| Income tax expense | (390 | ) | (559 | ) | (781 | ) | (1,263 | )
| Net of tax | $ | 1,358 |  | $ | (517 | ) | $ | 1,475 |  | $ | (362 | )
Equity in investee other comprehensive income | Income tax expense | $ | — |  | $ | (17 | ) | $ | — |  | $ | (34 | )
| Net of tax | $ | — |  | $ | (17 | ) | $ | — |  | $ | (34 | )
Unrealized loss on financial instruments | Cost of goods sold | $ | (46 | ) | $ | (46 | ) | $ | (93 | ) | $ | (93 | )
| Income tax expense | 8 |  | 9 |  | 16 |  | 17 |
| Net of tax | $ | (38 | ) | $ | (37 | ) | $ | (77 | ) | $ | (76 | )

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