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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill for the period ending June 30, 2017, by segment, were as follows:
(Dollars in thousands) | Advanced Connectivity Solutions |  | Elastomeric Material Solutions |  | Power Electronics Solutions |  | Other |  | Total
December 31, 2016 | $ | 51,693 |  |  | $ | 91,531 |  |  | $ | 62,983 |  |  | $ | 2,224 |  |  | $ | 208,431 |
Foreign currency translation adjustment | — |  |  | 786 |  |  | 5,121 |  |  | — |  |  | 5,907 |
Purchase accounting adjustment | — |  |  | 116 |  |  | — |  |  | — |  |  | 116 |
DSP acquisition | — |  |  | 17,793 |  |  | — |  |  | — |  |  | 17,793 |
June 30, 2017 | $ | 51,693 |  |  | $ | 110,226 |  |  | $ | 68,104 |  |  | $ | 2,224 |  |  | $ | 232,247 |
Intangible Assets | Intangible Assets
| June 30, 2017 |  | December 31, 2016
(Dollars in thousands) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Trademarks and patents | $ | 10,161 |  |  | $ | 1,637 |  |  | $ | 8,524 |  |  | $ | 6,825 |  |  | $ | 1,156 |  |  | $ | 5,669 |
Technology | 72,826 |  |  | 29,037 |  |  | 43,789 |  |  | 68,880 |  |  | 24,365 |  |  | 44,515 |
Covenant not to compete | 1,729 |  |  | 1,004 |  |  | 725 |  |  | 1,419 |  |  | 932 |  |  | 487 |
Customer relationships | 127,887 |  |  | 18,205 |  |  | 109,682 |  |  | 96,148 |  |  | 14,311 |  |  | 81,837 |
Total definite lived intangible assets | 212,603 |  |  | 49,883 |  |  | 162,720 |  |  | 173,272 |  |  | 40,764 |  |  | 132,508 |
Indefinite lived intangible assets | 4,506 |  |  | — |  |  | 4,506 |  |  | 4,168 |  |  | — |  |  | 4,168 |
Total intangible assets | $ | 217,109 |  |  | $ | 49,883 |  |  | $ | 167,226 |  |  | $ | 177,440 |  |  | $ | 40,764 |  |  | $ | 136,676 |
Weighted Average Amortization Period, by Intangible Asset Class | The weighted average amortization period as of June 30, 2017, by intangible asset class, is presented in the table below:
Intangible Asset Class |  | Weighted Average Amortization Period (Years)
Trademarks and patents |  | 7.2
Technology |  | 6.0
Customer relationships |  | 10.3
Covenant not to compete |  | 3.4
Total definite lived intangible assets |  | 8.9

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