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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill for the period ending September 30, 2018, by operating segment, were as follows:
(Dollars in thousands) | Advanced Connectivity Solutions |  | Elastomeric Material Solutions |  | Power Electronics Solutions |  | Other |  | Total
December 31, 2017 | $ | 51,693 |  |  | $ | 111,575 |  |  | $ | 71,615 |  |  | $ | 2,224 |  |  | $ | 237,107 |
Acquisition | — |  |  | 32,305 |  |  | — |  |  | — |  |  | 32,305 |
Foreign currency translation adjustment | — |  |  | (631 | ) |  | (2,477 | ) |  | — |  |  | (3,108 | )
September 30, 2018 | $ | 51,693 |  |  | $ | 143,249 |  |  | $ | 69,138 |  |  | $ | 2,224 |  |  | $ | 266,304 |
Intangible Assets | Other Intangible Assets
| September 30, 2018 |  | December 31, 2017
(Dollars in thousands) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships | $ | 149,933 |  |  | $ | 27,985 |  |  | $ | 121,948 |  |  | $ | 128,907 |  |  | $ | 22,514 |  |  | $ | 106,393 |
Technology | 81,840 |  |  | 36,974 |  |  | 44,866 |  |  | 73,891 |  |  | 33,491 |  |  | 40,400 |
Trademarks and trade names | 12,024 |  |  | 2,934 |  |  | 9,090 |  |  | 10,213 |  |  | 2,157 |  |  | 8,056 |
Covenants not to compete | 1,340 |  |  | 200 |  |  | 1,140 |  |  | 1,799 |  |  | 1,108 |  |  | 691 |
Total definite-lived other intangible assets | 245,137 |  |  | 68,093 |  |  | 177,044 |  |  | 214,810 |  |  | 59,270 |  |  | 155,540 |
Indefinite-lived other intangible asset | 4,574 |  |  | — |  |  | 4,574 |  |  | 4,738 |  |  | — |  |  | 4,738 |
Total other intangible assets | $ | 249,711 |  |  | $ | 68,093 |  |  | $ | 181,618 |  |  | $ | 219,548 |  |  | $ | 59,270 |  |  | $ | 160,278 |
Weighted Average Amortization Period, by Intangible Asset Class | The weighted average remaining amortization period as of September 30, 2018, by definite-lived other intangible asset class, is presented in the table below:
Definite-Lived Other Intangible Asset Class |  | Weighted Average Remaining Amortization Period
Customer relationships |  | 7.7
Technology |  | 4.4
Trademarks and trade names |  | 5.1
Covenants not to compete |  | 2.3
Total definite-lived other intangible assets |  | 6.7

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