OPERATING AND GEOGRAPHICAL SEGMENTS Geographic sources of revenue (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 374,485	$ 356,268	$ 1,067,380	$ 1,033,227
China, including Hong Kong
Segment Reporting Information [Line Items]
Net revenue	115,442	106,515	322,724	312,416
Germany
Segment Reporting Information [Line Items]
Net revenue	51,279	48,414	161,018	148,519
United States
Segment Reporting Information [Line Items]
Net revenue	58,969	51,515	162,227	140,909
South Korea
Segment Reporting Information [Line Items]
Net revenue	31,157	33,164	94,089	113,274
Taiwan
Segment Reporting Information [Line Items]
Net revenue	21,566	14,469	51,495	38,265
Singapore
Segment Reporting Information [Line Items]
Net revenue	15,208	15,638	43,445	34,433
Japan
Segment Reporting Information [Line Items]
Net revenue	10,062	10,119	24,463	29,022
FRANCE
Segment Reporting Information [Line Items]
Net revenue	3,618	4,811	9,407	22,684
Rest of Europe
Segment Reporting Information [Line Items]
Net revenue	34,300	33,294	108,104	90,682
Rest of Asia-Pacific
Segment Reporting Information [Line Items]
Net revenue	26,080	32,358	71,862	87,670
Rest of the World
Segment Reporting Information [Line Items]
Net revenue	$ 6,804	$ 5,971	$ 18,546	$ 15,353