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Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2015 | Jun. 30, 2014
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, 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) |  | — |  |  | (1,400 | ) |  | (5,660 | ) |  | (7,060 | )
Less: Net realized (losses) reclassified to net income (b), (c) |  | (2,730 | ) |  | (690 | ) |  | — |  |  | (3,420 | )
Net current-period other comprehensive income (loss) |  | 2,730 |  |  | (710 | ) |  | (5,660 | ) |  | (3,640 | )
Distribution of the Cequent businesses |  | — |  |  | 250 |  |  | (8,560 | ) |  | (8,310 | )
Net current-period comprehensive income (loss) |  | 2,730 |  |  | (460 | ) |  | (14,220 | ) |  | (11,950 | )
Balance, June 30, 2015 |  | $ | (11,450 | ) |  | $ | 150 |  |  | $ | 9,570 |  |  | $ | (1,730 | )
__________________________ (a) Derivative instruments, net of income tax of $0.6 million. See Note 8, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax of $1.6 million. See Note 13, "Defined Benefit Plans," for additional details. | 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 (a) |  | — |  |  | (300 | ) |  | 4,860 |  |  | 4,560 |
Less: Net realized (losses) reclassified to net income (b) |  | (350 | ) |  | (80 | ) |  | — |  |  | (430 | )
Net current-period other comprehensive income (loss) |  | 350 |  |  | (220 | ) |  | 4,860 |  |  | 4,990 |
Balance, June 30, 2014 |  | $ | (10,490 | ) |  | $ | 840 |  |  | $ | 42,470 |  |  | $ | 32,820 |
__________________________ (a) Derivative instruments, net of income tax of $0.5 million. See Note 8, "Derivative Instruments," for further details. (b) Defined benefit plans, net of income tax of $0.2 million. See Note 13, "Defined Benefit Plans," for additional details. Derivative instruments, net of income tax of $0.2 million. See Note 8, "Derivative Instruments," for further details.

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- Definition Other Comprehensive [Abstract] + References No definition available. + 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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