OPERATING AND GEOGRAPHICAL SEGMENTS Geographic sources of revenue (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 355,534	$ 347,816	$ 692,895	$ 676,959
China, including Hong Kong
Segment Reporting Information [Line Items]
Net revenue	114,081	107,211	207,282	205,901
Germany
Segment Reporting Information [Line Items]
Net revenue	50,478	51,521	109,739	100,105
United States
Segment Reporting Information [Line Items]
Net revenue	50,348	45,213	103,258	89,394
South Korea
Segment Reporting Information [Line Items]
Net revenue	29,900	36,899	62,932	80,110
Taiwan
Segment Reporting Information [Line Items]
Net revenue	19,211	10,504	29,929	23,796
Singapore
Segment Reporting Information [Line Items]
Net revenue	16,647	10,068	28,237	18,795
Japan
Segment Reporting Information [Line Items]
Net revenue	8,860	8,745	14,400	18,903
FRANCE
Segment Reporting Information [Line Items]
Net revenue	2,709	11,802	5,789	17,873
Rest of Europe
Segment Reporting Information [Line Items]
Net revenue	35,451	28,995	73,804	57,388
Rest of Asia-Pacific
Segment Reporting Information [Line Items]
Net revenue	21,760	32,507	45,782	55,312
Rest of the World
Segment Reporting Information [Line Items]
Net revenue	$ 6,089	$ 4,351	$ 11,743	$ 9,382