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Accumulated Other Comprehensive (Loss) Income (Tables) | 6 Months Ended
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Jun. 30, 2011
Amounts Included in Accumulated Other Comprehensive (Loss) Income | Amounts included in accumulated other comprehensive (loss) income, net of tax, consisted of the following:
|  | June 30, |  |  | June 30, |  |  | Dec. 31, |
|  | 2011 |  |  | 2010 |  |  | 2010 |
|  | (Dollars in thousands) |
Foreign currency translation |  | $ | 31,422 |  |  | $ | 4,758 |  |  | $ | 17,276 |
Change in fair value of derivatives |  |  | (5,212 | ) |  |  | (8,033 | ) |  |  | (6,695 | )
Unrecognized net periodic pension and |  |  |  |  |  |  |  |  |  |  |  |
other postretirement benefit costs: |  |  |  |  |  |  |  |  |  |  |  |
Net prior service credit |  |  | 6,238 |  |  |  | 6,647 |  |  |  | 6,391 |
Net actuarial loss |  |  | (77,366 | ) |  |  | (73,959 | ) |  |  | (79,998 | )
Accumulated other comprehensive loss |  | $ | (44,918 | ) |  | $ | (70,587 | ) |  | $ | (63,026 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + Details
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Namespace Prefix: | us-gaap
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration