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Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2013
Other Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Changes in AOCI by component for the nine months ended September 30, 2013 are summarized as follows:
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
|  | (dollars in thousands)
Balance, December 31, 2012 |  | $ | (12,440 | ) |  | $ | (1,680 | ) |  | $ | 53,380 |  |  | $ | 39,260 |
Net unrealized gains (losses) arising during the period |  | 600 |  |  | 3,340 |  |  | (4,630 | ) |  | (690 | )
Less: Net realized gains (losses) reclassified to net income |  | — |  |  | (610 | ) |  | 7,910 |  |  | 7,300 |
Net current-period change |  | 600 |  |  | 3,950 |  |  | (12,540 | ) |  | (7,990 | )
Balance, September 30, 2013 |  | $ | (11,840 | ) |  | $ | 2,270 |  |  | $ | 40,840 |  |  | $ | 31,270 |

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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=28358780&loc=SL7669686-108580 + Details
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