OPERATING AND GEOGRAPHICAL SEGMENTS Geographic sources of revenue (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Net revenue	$ 318,288	$ 337,361
China, including Hong Kong
Segment Reporting Information [Line Items]
Net revenue	93,408	93,201
United States
Segment Reporting Information [Line Items]
Net revenue	57,998	52,910
Germany
Segment Reporting Information [Line Items]
Net revenue	41,810	59,261
South Korea
Segment Reporting Information [Line Items]
Net revenue	26,175	33,032
Taiwan
Segment Reporting Information [Line Items]
Net revenue	15,013	5,540
Singapore
Segment Reporting Information [Line Items]
Net revenue	10,166	10,718
Japan
Segment Reporting Information [Line Items]
Net revenue	9,961	11,590
FRANCE
Segment Reporting Information [Line Items]
Net revenue	3,142	3,080
Rest of Europe
Segment Reporting Information [Line Items]
Net revenue	31,549	38,353
Rest of Asia-Pacific
Segment Reporting Information [Line Items]
Net revenue	23,125	24,022
Rest of the World
Segment Reporting Information [Line Items]
Net revenue	$ 5,941	$ 5,654