SEGMENT INFORMATION, Revenue by Segment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Segment Market	Jun. 30, 2016 USD ($)
SEGMENT INFORMATION [Abstract]
Number of markets | Market			50
Number of segments | Segment			7
Revenue by Segment [Abstract]
Revenue	$ 550,101	$ 600,475	$ 1,049,200	$ 1,072,306
Operating Segment [Member]
Revenue by Segment [Abstract]
Revenue	550,101	600,475	1,049,200	1,072,306
Operating Segment [Member] | Mainland China [Member]
Revenue by Segment [Abstract]
Revenue	172,098	184,344	322,102	302,999
Operating Segment [Member] | South Korea [Member]
Revenue by Segment [Abstract]
Revenue	86,917	93,036	169,388	179,154
Operating Segment [Member] | Americas [Member]
Revenue by Segment [Abstract]
Revenue	77,096	67,884	142,754	133,632
Operating Segment [Member] | South Asia/Pacific [Member]
Revenue by Segment [Abstract]
Revenue	67,935	92,297	137,733	155,875
Operating Segment [Member] | Japan [Member]
Revenue by Segment [Abstract]
Revenue	64,796	72,849	125,952	137,940
Operating Segment [Member] | Hong Kong/Taiwan [Member]
Revenue by Segment [Abstract]
Revenue	43,071	52,372	79,019	92,428
Operating Segment [Member] | EMEA [Member]
Revenue by Segment [Abstract]
Revenue	$ 38,188	$ 37,693	$ 72,252	$ 70,278