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Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013
Other Comprehensive Income [Abstract] |  |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Changes in AOCI by component for the six months ended June 30, 2014 are summarized as follows:
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
|  | (dollars in thousands)
Balance, December 31, 2013 |  | $ | (10,840 | ) |  | $ | 1,060 |  |  | $ | 37,610 |  |  | $ | 27,830 |
Net unrealized gains (losses) arising during the period |  | — |  |  | (300 | ) |  | 4,860 |  |  | 4,560 |
Less: Net realized (losses) reclassified to net income (a) |  | (350 | ) |  | (80 | ) |  | — |  |  | (430 | )
Net current-period change |  | 350 |  |  | (220 | ) |  | 4,860 |  |  | 4,990 |
Balance, June 30, 2014 |  | $ | (10,490 | ) |  | $ | 840 |  |  | $ | 42,470 |  |  | $ | 32,820 |
__________________________ (a) Defined benefit plans, net of income tax of $0.2 million. See Note 16, "Defined Benefit Plans," for additional details. Derivative instruments, net of income tax of $0.2 million. See Note 11, "Derivative Instruments," for further details. | Changes in AOCI by component for the six months ended June 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 |  | 390 |  |  | 4,380 |  |  | (10,610 | ) |  | (5,840 | )
Less: Net realized (losses) reclassified to net income(a) |  | — |  |  | (370 | ) |  | — |  |  | (370 | )
Net current-period change |  | 390 |  |  | 4,750 |  |  | (10,610 | ) |  | (5,470 | )
Balance, June 30, 2013 |  | $ | (12,050 | ) |  | $ | 3,070 |  |  | $ | 42,770 |  |  | $ | 33,790 |
__________________________ (a) Derivative instruments, net of income tax of $0.2 million. See Note 11, "Derivative Instrument s," for additional 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=28358780&loc=SL7669686-108580 + Details
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