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Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Sep. 27, 2014 | Sep. 01, 2014
Goodwill [Roll Forward] |  |
Balance at beginning of period | $ 43,132 |
Exchange rate effects | (1,138) |
Balance at end of period | 147,436 |
Holy Stone Polytech [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | 7,736 |
Other intangible assets related to acquisitions | 3,736 |
Capella [Member] |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period |  | 97,706
Goodwill acquired during period | 97,706 |
Balance at end of period |  | 97,706
Other intangible assets related to acquisitions | 74,481 |
Resistors And Inductors Segment [Member] |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 43,132 |
Exchange rate effects | (643) |
Balance at end of period | 42,489 |
Resistors And Inductors Segment [Member] | Holy Stone Polytech [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | 0 |
Resistors And Inductors Segment [Member] | Capella [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | 0 |
Capacitors Segment [Member] |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 0 |
Exchange rate effects | (495) |
Balance at end of period | 7,241 |
Capacitors Segment [Member] | Holy Stone Polytech [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | 7,736 |
Capacitors Segment [Member] | Capella [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | 0 |
Optoelectronic Components Segment [Member] |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 0 |
Exchange rate effects | 0 |
Balance at end of period | 97,706 |
Optoelectronic Components Segment [Member] | Holy Stone Polytech [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | 0 |
Optoelectronic Components Segment [Member] | Capella [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill acquired during period | $ 97,706 |

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