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REVENUE, Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | $ 146,489 | $ 126,386 | $ 405,451 | $ 371,671
Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 108,951 |  | 293,416 |
Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 37,538 |  | 112,035 |
Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 48,526 |  | 140,373 |
Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 52,972 |  | 136,748 |
Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 44,991 |  | 128,330 |
North America [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 70,654 | 59,537 | 201,351 | 184,873
North America [Member] | Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 46,802 |  | 128,754 |
North America [Member] | Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 23,852 |  | 72,597 |
North America [Member] | Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 34,919 |  | 100,797 |
North America [Member] | Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 10,586 |  | 28,795 |
North America [Member] | Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 25,149 |  | 71,759 |
Asia [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 53,528 | 45,919 | 138,062 | 127,801
Asia [Member] | Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 46,965 |  | 119,294 |
Asia [Member] | Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 6,563 |  | 18,768 |
Asia [Member] | Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 5,293 |  | 13,533 |
Asia [Member] | Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 40,100 |  | 100,769 |
Asia [Member] | Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 8,135 |  | 23,760 |
Europe [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 22,307 | $ 20,930 | 66,038 | $ 58,997
Europe [Member] | Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 15,184 |  | 45,368 |
Europe [Member] | Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 7,123 |  | 20,670 |
Europe [Member] | Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 8,314 |  | 26,043 |
Europe [Member] | Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | 2,286 |  | 7,184 |
Europe [Member] | Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Disaggregation of revenue | $ 11,707 |  | $ 32,811 |

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