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Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2013
Other Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Changes in AOCI by component for the three months ended March 31, 2013 is 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 |  | 200 |  |  | 770 |  |  | (2,140 | ) |  | (1,170 | )
Less: Net realized losses reclassified to net income |  | — |  |  | (90 | ) |  | — |  |  | (90 | )
Net current-period change |  | 200 |  |  | 680 |  |  | (2,140 | ) |  | (1,260 | )
Balance, March 31, 2013 |  | $ | (12,240 | ) |  | $ | (1,000 | ) |  | $ | 51,240 |  |  | $ | 38,000 |

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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=20435746&loc=SL7669686-108580 + Details
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