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Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
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, 2015 are summarized as follows:
|  | Defined Benefit Plans |  | Derivative Instruments |  | Foreign Currency Translation |  | Total
|  | (dollars in thousands)
Balance, December 31, 2014 |  | $ | (14,180 | ) |  | $ | 610 |  |  | $ | 23,790 |  |  | $ | 10,220 |
Net unrealized (losses) arising during the period (a) |  | — |  |  | (710 | ) |  | (6,540 | ) |  | (7,250 | )
Less: Net realized (losses) reclassified to net income (b) |  | (250 | ) |  | (320 | ) |  | — |  |  | (570 | )
Net current-period change |  | 250 |  |  | (390 | ) |  | (6,540 | ) |  | (6,680 | )
Balance, March 31, 2015 |  | $ | (13,930 | ) |  | $ | 220 |  |  | $ | 17,250 |  |  | $ | 3,540 |
__________________________ (a) Derivative instruments, net of income tax of $0.3 million. See Note 8, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax of $0.1 million. See Note 13, "Defined Benefit Plans," for additional details. Derivative instruments, net of income tax of $0.1 million. See Note 8, "Derivative Instruments," for further details. | Changes in AOCI by component for the three months ended March 31, 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 arising during the period (a) |  | — |  |  | 200 |  |  | 1,880 |  |  | 2,080 |
Less: Net realized (losses) reclassified to net income (b) |  | (180 | ) |  | (110 | ) |  | — |  |  | (290 | )
Net current-period change |  | 180 |  |  | 310 |  |  | 1,880 |  |  | 2,370 |
Balance, March 31, 2014 |  | $ | (10,660 | ) |  | $ | 1,370 |  |  | $ | 39,490 |  |  | $ | 30,200 |
__________________________ (a) Derivative instruments, net of income tax of $0.1 million. See Note 8, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax of $0.1 million. See Note 13, "Defined Benefit Plans," for additional details. Derivative instruments, net of income tax of $0.1 million. See Note 8, "Derivative Instruments," for further 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=36458714&loc=SL7669686-108580 + Details
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