OPERATING AND GEOGRAPHICAL SEGMENTS (Details 2) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Geographic sources of revenues and locations of long-lived assets
Net revenues	$ 478,642	$ 393,361	$ 940,069	$ 741,910
Long-lived assets	296,893		296,893		281,775
Exclusions from long-lived assets
Auction-rate securities	2,251		2,251		2,251
Goodwill	57,199		57,199		54,676
Intangible assets, net	14,057		14,057		17,603
Deferred income tax assets	144,206		144,206		140,562
United States
Geographic sources of revenues and locations of long-lived assets
Net revenues	65,328	63,363	134,855	125,384
Long-lived assets	95,711		95,711		106,052
Germany
Geographic sources of revenues and locations of long-lived assets
Net revenues	59,169	50,060	119,399	98,815
Long-lived assets	19,821		19,821		18,963
France
Geographic sources of revenues and locations of long-lived assets
Net revenues	8,424	17,071	17,419	33,517
Long-lived assets	30,363		30,363		30,674
Japan
Geographic sources of revenues and locations of long-lived assets
Net revenues	14,697	10,371	29,553	19,537
China, including Hong Kong
Geographic sources of revenues and locations of long-lived assets
Net revenues	143,530	124,013	270,672	225,259
Singapore
Geographic sources of revenues and locations of long-lived assets
Net revenues	12,129	11,260	23,289	20,758
South Korea
Geographic sources of revenues and locations of long-lived assets
Net revenues	51,690	27,965	102,905	42,597
Taiwan
Geographic sources of revenues and locations of long-lived assets
Net revenues	52,235	22,384	93,894	43,744
Philippines
Geographic sources of revenues and locations of long-lived assets
Long-lived assets	75,332		75,332		65,049
Asia-Pacific
Geographic sources of revenues and locations of long-lived assets
Long-lived assets	66,593		66,593		47,524
Rest of Asia-Pacific
Geographic sources of revenues and locations of long-lived assets
Net revenues	13,560	16,919	34,356	31,024
Rest of Europe
Geographic sources of revenues and locations of long-lived assets
Net revenues	50,521	43,146	101,061	88,608
Long-lived assets	9,073		9,073		13,513
Rest of the World
Geographic sources of revenues and locations of long-lived assets
Net revenues	$ 7,359	$ 6,809	$ 12,666	$ 12,667