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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Definite Lived Intangible Assets
(Dollars in thousands) | March 31, 2015 |  | December 31, 2014
| Gross Carrying Amount (1) |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount (1) |  | Accumulated Amortization |  | Net Carrying Amount
Trademarks and patents | $ | 2,583 |  |  | $ | 432 |  |  | $ | 2,151 |  |  | $ | 1,046 |  |  | $ | 364 |  |  | $ | 682 |
Technology | 46,481 |  |  | 15,639 |  |  | 30,842 |  |  | 33,942 |  |  | 15,958 |  |  | 17,984 |
Covenant-not-to-compete | 999 |  |  | 856 |  |  | 143 |  |  | 1,016 |  |  | 823 |  |  | 193 |
Customer relationships | 50,026 |  |  | 5,179 |  |  | 44,847 |  |  | 19,123 |  |  | 4,406 |  |  | 14,717 |
Total definite lived intangible assets | $ | 100,089 |  |  | $ | 22,106 |  |  | $ | 77,983 |  |  | $ | 55,127 |  |  | $ | 21,551 |  |  | $ | 33,576 |
Weighted Average Amortization Period, by Intangible Asset Class | The weighted average amortization period as of March 31, 2015, by intangible asset class, is presented in the table below:
Intangible Asset Class |  | Weighted Average Amortization Period
Trademarks and patents |  | 4.2
Technology |  | 4.7
Covenant not-to-compete |  | 1.0
Customer relationships |  | 6.1
Total other intangible assets |  | 5.5
Changes in the Carrying Amount of Goodwill, by Segment | The changes in the carrying amount of goodwill for the period ending March 31, 2015, by segment, was as follows:
(Dollars in thousands) | Printed Circuit Materials |  | High Performance Foams |  | Power Electronics Solutions |  | Other |  | Total
December 31, 2014 | $ | — |  |  | $ | 23,565 |  |  | $ | 72,438 |  |  | $ | 2,224 |  |  | $ | 98,227 |
Foreign currency translation adjustment | — |  |  | (275 | ) |  | (8,322 | ) |  | — |  |  | (8,597 | )
Arlon acquisition | 51,862 |  |  | 33,517 |  |  | — |  |  | — |  |  | 85,379 |
March 31, 2015 | $ | 51,862 |  |  | $ | 56,807 |  |  | $ | 64,116 |  |  | $ | 2,224 |  |  | $ | 175,009 |

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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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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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