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SIGNIFICANT CUSTOMERS AND GEOGRAPHIC NET REVENUES Geographic Net Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Revenue by Geography |  |  |  |
Net Revenues | $ 111,255 | $ 101,625 | $ 323,506 | $ 287,232
United States of America |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 4,775 | 4,153 | 13,078 | 11,372
Hong Kong/China |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 59,328 | 53,324 | 170,720 | 146,021
Taiwan |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 12,424 | 12,067 | 36,220 | 36,486
Korea |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 9,343 | 11,363 | 28,527 | 30,923
Western Europe (excluding Germany) |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 12,963 | 9,850 | 37,685 | 30,400
Japan |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 4,853 | 5,208 | 15,338 | 15,552
Germany |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | 2,817 | 1,939 | 8,528 | 5,789
Other |  |  |  |
Revenue by Geography |  |  |  |
Net Revenues | $ 4,752 | $ 3,721 | $ 13,410 | $ 10,689

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