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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2014
Equity [Abstract] |
Amounts Included in Accumulated Other Comprehensive Income (Loss), Net of Tax | Amounts included in accumulated other comprehensive loss, net of tax, were as follows:
| Unrecognized Net Defined Benefit Plan Costs |  | Change in Fair Value of Derivatives |  | Foreign Currency Translation |  | Total
| (Dollars in thousands)
Balance at January 1, 2012 | $ | (99,209 | ) |  | $ | (6,822 | ) |  | $ | (9,251 | ) |  | $ | (115,282 | )
Other comprehensive loss before reclassifications | (13,389 | ) |  | (4,513 | ) |  | 12,740 |  |  | (5,162 | )
Amounts reclassified from accumulated other comprehensive loss | 6,923 |  |  | 3,608 |  |  | — |  |  | 10,531 |
Other comprehensive income | (6,466 | ) |  | (905 | ) |  | 12,740 |  |  | 5,369 |
Balance at December 31, 2012 | (105,675 | ) |  | (7,727 | ) |  | 3,489 |  |  | (109,913 | )
Other comprehensive income before reclassifications | 59,648 |  |  | 340 |  |  | 1,103 |  |  | 61,091 |
Amounts reclassified from accumulated other comprehensive loss | 7,106 |  |  | 3,597 |  |  | — |  |  | 10,703 |
Other comprehensive income | 66,754 |  |  | 3,937 |  |  | 1,103 |  |  | 71,794 |
Balance at December 31, 2013 | (38,921 | ) |  | (3,790 | ) |  | 4,592 |  |  | (38,119 | )
Other comprehensive loss before reclassifications | (49,602 | ) |  | (923 | ) |  | (79,766 | ) |  | (130,291 | )
Amounts reclassified from accumulated other comprehensive loss | (729 | ) |  | 3,515 |  |  | — |  |  | 2,786 |
Other comprehensive loss | (50,331 | ) |  | 2,592 |  |  | (79,766 | ) |  | (127,505 | )
Balance at December 31, 2014 | $ | (89,252 | ) |  | $ | (1,198 | ) |  | $ | (75,174 | ) |  | $ | (165,624 | )

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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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