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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Definite Lived Intangible Assets
(Dollars in thousands) | March 31, 2014 |  | December 31, 2013
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Trademarks and patents | $ | 1,064 |  |  | $ | 317 |  |  | $ | 747 |  |  | $ | 1,075 |  |  | $ | 303 |  |  | $ | 772 |
Technology | 37,852 |  |  | 14,406 |  |  | 23,446 |  |  | 37,825 |  |  | 13,340 |  |  | 24,485 |
Covenant-not-to-compete | 1,041 |  |  | 675 |  |  | 366 |  |  | 1,056 |  |  | 628 |  |  | 428 |
Customer relationships | 21,240 |  |  | 3,577 |  |  | 17,663 |  |  | 21,280 |  |  | 3,235 |  |  | 18,045 |
Total definite lived intangible assets | $ | 61,197 |  |  | $ | 18,975 |  |  | $ | 42,222 |  |  | $ | 61,236 |  |  | $ | 17,506 |  |  | $ | 43,730 |
Weighted Average Amortization Period, by Intangible Asset Class | The weighted average amortization period as of March 31, 2014, by intangible asset class, is presented in the table below:
Intangible Asset Class |  | Weighted Average Amortization Period
Trademarks and patents |  | 4.1
Technology |  | 7.1
Covenant not-to-compete |  | 1.5
Customer relationships |  | 7.0
Total other intangible assets |  | 5.4
Changes in the Carrying Amount of Goodwill, by Segment | The changes in the carrying amount of goodwill for the period ending March 31, 2014, by reportable segment, is as follows:
(Dollars in thousands) | High Performance Foams |  | Printed Circuit Materials |  | Power Electronics Solutions |  | Other |  | Total
December 31, 2013 | $ | 24,205 |  |  | $ | — |  |  | $ | 82,242 |  |  | $ | 2,224 |  |  | $ | 108,671 |
Foreign currency translation adjustment | (237 | ) |  | — |  |  | 124 |  |  | — |  |  | (113 | )
March 31, 2014 | $ | 23,968 |  |  | $ | — |  |  | $ | 82,366 |  |  | $ | 2,224 |  |  | $ | 108,558 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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