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REVENUE, Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | $ 127,416 | $ 140,710 | $ 252,805 | $ 258,961
Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 91,442 | 99,447 | 182,664 | 184,464
Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 35,974 | 41,263 | 70,141 | 74,497
Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 42,536 | 48,928 | 86,897 | 91,846
Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 40,852 | 45,548 | 79,108 | 83,776
Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 44,028 | 46,234 | 86,800 | 83,339
North America [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 67,066 | 71,240 | 131,653 | 130,696
North America [Member] | Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 45,442 | 44,055 | 89,323 | 81,951
North America [Member] | Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 21,624 | 27,185 | 42,330 | 48,745
North America [Member] | Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 31,297 | 34,834 | 63,418 | 65,878
North America [Member] | Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 9,638 | 10,158 | 18,583 | 18,209
North America [Member] | Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 26,131 | 26,248 | 49,652 | 46,609
Asia [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 39,324 | 45,914 | 76,601 | 84,535
Asia [Member] | Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 32,707 | 39,402 | 63,835 | 72,330
Asia [Member] | Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 6,617 | 6,512 | 12,766 | 12,205
Asia [Member] | Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 3,027 | 4,820 | 6,502 | 8,241
Asia [Member] | Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 29,168 | 32,844 | 56,258 | 60,669
Asia [Member] | Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 7,129 | 8,250 | 13,841 | 15,625
Europe [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 21,026 | 23,556 | 44,551 | 43,730
Europe [Member] | Direct to Customer [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 13,293 | 15,990 | 29,506 | 30,183
Europe [Member] | Through Distribution [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 7,733 | 7,566 | 15,045 | 13,547
Europe [Member] | Connectivity Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 8,212 | 9,274 | 16,977 | 17,727
Europe [Member] | Magnetic Solutions [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | 2,046 | 2,546 | 4,267 | 4,898
Europe [Member] | Power Solutions and Protection [Member] |  |  |  |
Disaggregation of Revenue [Abstract] |  |  |  |
Net sales | $ 10,768 | $ 11,736 | $ 23,307 | $ 21,105

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