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Supplemental financial statement information (Tables) | 12 Months Ended
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Dec. 31, 2015
Additional financial information disclosures [Abstract] |
Components of Accumulated Other Comprehensive Loss |
Components of Accumulated Other Comprehensive Loss: | 2015 | 2014
Defined benefit plan liabilities | $ | (121,910 | ) | $ | (128,664 | )
Unrealized loss on financial instruments | (1,435 | ) | (1,249 | )
Other comprehensive loss before income tax effect | (123,345 | ) | (129,913 | )
Income tax effect (1) | 10,695 |  | 12,231 |
Accumulated other comprehensive loss | $ | (112,650 | ) | $ | (117,682 | )
(1) | The allocation of the income tax effect to the components of other comprehensive income is as follows:
| 2015 | 2014
Defined benefit plan liabilities | $ | 11,243 |  | $ | 12,812 |
Unrealized loss on financial instruments | (548 | ) | (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, December 31, 2012 | $ | (137,441 | ) | $ | (12,224 | ) | $ | (1,527 | ) | $ | (151,192 | )
Other comprehensive income (loss) before reclassifications | 56,795 |  | (8 | ) | — |  | 56,787 |
Net amount reclassified to net income | 2,725 |  | — |  | (152 | ) | 2,573 |
Balance, December 31, 2013 | (77,921 | ) | (12,232 | ) | (1,679 | ) | (91,832 | )
Other comprehensive income (loss) before reclassifications | (42,926 | ) | (419 | ) | — |  | (43,345 | )
Net amount reclassified to net income | 4,995 |  | — |  | (151 | ) | 4,844 |
Elimination of equity in investee resulting from acquisition | — |  | 12,651 |  | — |  | 12,651 |
Balance, December 31, 2014 | (115,852 | ) | — |  | (1,830 | ) | (117,682 | )
Other comprehensive income before reclassifications | 7,311 |  | — |  | — |  | 7,311 |
Net amount reclassified to net income | (2,126 | ) | — |  | (153 | ) | (2,279 | )
Balance, December 31, 2015 | $ | (110,667 | ) | $ | — |  | $ | (1,983 | ) | $ | (112,650 | )
Reclassification out of AOCI | Reclassifications out of AOCI were included in the consolidated statements of operations as follows:
|  | Gains (Losses) Reclassified from AOCI to the Consolidated Statements of Operations
AOCI Components | Location | 2015 | 2014 | 2013
Defined benefit plan and other postretirement liabilities | Cost of goods sold | $ | (1,696 | ) | $ | 6,237 |  | $ | 3,264 |
| Selling, general and administrative expenses | 235 |  | 569 |  | 990 |
| Other operating expense, net | 904 |  | — |  | — |
| Income tax expense | (1,569 | ) | (1,811 | ) | (1,529 | )
| Net of tax | $ | (2,126 | ) | $ | 4,995 |  | $ | 2,725 |
Equity in investee other comprehensive income | Cost of goods sold | $ | — |  | $ | — |  | $ | — |
| Income tax expense | — |  | (419 | ) | (70 | )
| Net of tax | $ | — |  | $ | (419 | ) | $ | (70 | )
Unrealized loss on financial instruments | Cost of goods sold | $ | (186 | ) | $ | (185 | ) | $ | (186 | )
| Income tax expense | 33 |  | 34 |  | 34 |
| Net of tax | $ | (153 | ) | $ | (151 | ) | $ | (152 | )

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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