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Components of accumulated other comprehensive loss (Tables) | 6 Months Ended
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Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated balances for each component of AOCI |
| June 30, 2017 |  | December 31, 2016
Defined benefit plan liabilities | $ | (124,180 | ) |  | $ | (125,917 | )
Unrealized loss on financial instruments | 2,766 |  |  | 2,860 |
Other comprehensive loss before income tax effect | (121,414 | ) |  | (123,057 | )
Income tax effect (1) | 8,402 |  |  | 9,164 |
Accumulated other comprehensive loss | $ | (113,012 | ) |  | $ | (113,893 | )
(1) The allocation of the income tax effect to the components of other comprehensive loss is as follows:
| June 30, 2017 |  | December 31, 2016
Defined benefit plan liabilities | $ | 8,955 |  |  | $ | 9,736 |
Unrealized loss on financial instruments | (553 | ) |  | (572 | )
The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCL"):
| Defined benefit plan and other postretirement liabilities |  | Unrealized gain (loss) on financial instruments |  | Total, net of tax
Balance, April 1, 2017 | $ | (115,431 | ) |  | $ | 2,250 |  |  | $ | (113,181 | )
Net amount reclassified to net income | 206 |  |  | (37 | ) |  | 169 |
Balance, June 30, 2017 | $ | (115,225 | ) |  | $ | 2,213 |  |  | $ | (113,012 | )
Balance, April 1, 2016 | $ | (109,806 | ) |  | $ | (2,021 | ) |  | $ | (111,827 | )
Net amount reclassified to net loss | 862 |  |  | (38 | ) |  | 824 |
Balance, June 30, 2016 | $ | (108,944 | ) |  | $ | (2,059 | ) |  | $ | (111,003 | )
Balance, December 31, 2016 | $ | (116,181 | ) |  | $ | 2,288 |  |  | $ | (113,893 | )
Net amount reclassified to net loss | 956 |  |  | (75 | ) |  | 881 |
Balance, June 30, 2017 | $ | (115,225 | ) |  | $ | 2,213 |  |  | $ | (113,012 | )
Balance, December 31, 2015 | $ | (110,667 | ) |  | $ | (1,983 | ) |  | $ | (112,650 | )
Net amount reclassified to net loss | 1,723 |  |  | (76 | ) |  | 1,647 |
Balance, June 30, 2016 | $ | (108,944 | ) |  | $ | (2,059 | ) |  | $ | (111,003 | )
Reclassification out of AOCI | Reclassifications out of AOCL were included in the consolidated statements of operations as follows:
|  |  |  | For the three months ended June 30, |  | For the six months ended June 30,
AOCL Components |  | Location |  | 2017 |  | 2016 |  | 2017 |  | 2016
Defined benefit plan and other postretirement liabilities |  | Cost of goods sold |  | $ | (1,468 | ) |  | $ | 778 |  |  | $ | (161 | ) |  | $ | 1,555 |
|  | Selling, general and administrative expenses |  | 845 |  |  | 125 |  |  | 977 |  |  | 250 |
|  | Other operating expense, net |  | 528 |  |  | 350 |  |  | 922 |  |  | 700 |
|  | Income tax effect |  | 301 |  |  | (391 | ) |  | (782 | ) |  | (782 | )
|  | Net of tax |  | $ | 206 |  |  | $ | 862 |  |  | $ | 956 |  |  | $ | 1,723 |
Unrealized loss on financial instruments |  | Cost of goods sold |  | $ | (47 | ) |  | $ | (47 | ) |  | $ | (94 | ) |  | $ | (93 | )
|  | Income tax effect |  | 10 |  |  | 9 |  |  | 19 |  |  | 17 |
|  | Net of tax |  | $ | (37 | ) |  | $ | (38 | ) |  | $ | (75 | ) |  | $ | (76 | )

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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=66004124&loc=SL7669686-108580 + Details
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