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SEGMENT INFORMATION, Revenue by Segment (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 USD ($) Segment Market | Mar. 31, 2017 USD ($)
SEGMENT INFORMATION [Abstract] |  |
Number of markets | Market | 50 |
Number of segments | Segment | 7 |
Revenue by Segment [Abstract] |  |
Revenue | $ 616,219 | $ 499,099
Operating Segment [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 616,219 | 499,099
Operating Segment [Member] | Mainland China [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 197,531 | 150,004
Operating Segment [Member] | Americas/Pacific [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 92,289 | 71,425
Operating Segment [Member] | South Korea [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 88,930 | 82,471
Operating Segment [Member] | Southeast Asia [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 70,860 | 63,025
Operating Segment [Member] | Japan [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 63,224 | 61,156
Operating Segment [Member] | EMEA [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 44,981 | 34,064
Operating Segment [Member] | Hong Kong/Taiwan [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | 40,992 | 35,948
Operating Segment [Member] | Other [Member] |  |
Revenue by Segment [Abstract] |  |
Revenue | $ 17,412 | $ 1,006

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