SEGMENT INFORMATION, Revenue by Segment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Segment Market	Sep. 30, 2016 USD ($)
SEGMENT INFORMATION [Abstract]
Number of markets | Market			50
Number of segments | Segment			7
Revenue by Segment [Abstract]
Revenue	$ 563,698	$ 604,162	$ 1,612,898	$ 1,676,468
Operating Segment [Member]
Revenue by Segment [Abstract]
Revenue	563,698	604,162	1,612,898	1,676,468
Operating Segment [Member] | Mainland China [Member]
Revenue by Segment [Abstract]
Revenue	172,556	168,320	494,658	471,319
Operating Segment [Member] | South Korea [Member]
Revenue by Segment [Abstract]
Revenue	89,238	136,188	258,626	315,342
Operating Segment [Member] | Americas [Member]
Revenue by Segment [Abstract]
Revenue	79,214	71,250	221,968	204,882
Operating Segment [Member] | South Asia/Pacific [Member]
Revenue by Segment [Abstract]
Revenue	78,994	70,867	216,727	226,742
Operating Segment [Member] | Japan [Member]
Revenue by Segment [Abstract]
Revenue	62,513	72,489	188,465	210,429
Operating Segment [Member] | Hong Kong/Taiwan [Member]
Revenue by Segment [Abstract]
Revenue	41,050	48,140	120,069	140,568
Operating Segment [Member] | EMEA [Member]
Revenue by Segment [Abstract]
Revenue	$ 40,133	$ 36,908	$ 112,385	$ 107,186