SEGMENT INFORMATION, Revenue by Segment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Segment Market	Sep. 30, 2017 USD ($)
SEGMENT INFORMATION [Abstract]
Number of markets | Market			50
Number of segments | Segment			7
Revenue by Segment [Abstract]
Revenue	$ 675,312	$ 563,698	$ 1,995,721	$ 1,612,898
Operating Segment [Member]
Revenue by Segment [Abstract]
Revenue	675,312	563,698	1,995,721	1,612,898
Operating Segment [Member] | Mainland China [Member]
Revenue by Segment [Abstract]
Revenue	226,645	172,556	669,432	494,658
Operating Segment [Member] | Americas/Pacific [Member]
Revenue by Segment [Abstract]
Revenue	93,580	85,672	289,859	240,094
Operating Segment [Member] | South Korea [Member]
Revenue by Segment [Abstract]
Revenue	89,963	89,238	270,517	258,626
Operating Segment [Member] | Southeast Asia [Member]
Revenue by Segment [Abstract]
Revenue	86,307	71,141	236,390	194,711
Operating Segment [Member] | Japan [Member]
Revenue by Segment [Abstract]
Revenue	63,649	62,513	190,986	188,465
Operating Segment [Member] | Hong Kong/Taiwan [Member]
Revenue by Segment [Abstract]
Revenue	44,949	41,050	138,147	120,069
Operating Segment [Member] | EMEA [Member]
Revenue by Segment [Abstract]
Revenue	42,819	40,133	131,810	112,385
Operating Segment [Member] | Other [Member]
Revenue by Segment [Abstract]
Revenue	$ 27,400	$ 1,395	$ 68,580	$ 3,890