OPERATING AND GEOGRAPHICAL SEGMENTS 2 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Geographic sources of revenue and locations of long-lived assets
Net revenue	$ 1,386,447	$ 1,432,110	$ 1,803,053
Long-lived assets	227,718	240,629
Exclusions from long-lived assets
Fair value of investment	3,247	3,753
Goodwill	108,240	104,430	67,662
Intangible assets, net	28,116	27,257
Non-current deferred tax assets(3)	134,365	102,315
Auction-rate securities
Exclusions from long-lived assets
Fair value of investment	1,066
United States
Geographic sources of revenue and locations of long-lived assets
Net revenue	192,878	189,699	249,887
Long-lived assets	104,912	85,044
Philippines
Geographic sources of revenue and locations of long-lived assets
Long-lived assets	50,472	61,594
Germany
Geographic sources of revenue and locations of long-lived assets
Net revenue	199,298	175,930	237,777
Long-lived assets	24,244	17,602
FRANCE
Geographic sources of revenue and locations of long-lived assets
Net revenue	26,270	28,343	31,231
Long-lived assets	17,249	28,000
Japan
Geographic sources of revenue and locations of long-lived assets
Net revenue	41,533	51,141	57,376
China, including Hong Kong
Geographic sources of revenue and locations of long-lived assets
Net revenue	417,617	451,642	531,561
Singapore
Geographic sources of revenue and locations of long-lived assets
Net revenue	44,957	41,637	42,982
South Korea
Geographic sources of revenue and locations of long-lived assets
Net revenue	142,476	178,547	223,967
Taiwan
Geographic sources of revenue and locations of long-lived assets
Net revenue	51,830	67,806	135,650
Asia-Pacific
Geographic sources of revenue and locations of long-lived assets
Long-lived assets	23,815	38,842
Rest of Asia-Pacific
Geographic sources of revenue and locations of long-lived assets
Net revenue	120,290	72,128	71,048
Rest of Europe
Geographic sources of revenue and locations of long-lived assets
Net revenue	128,841	149,104	193,558
Long-lived assets	7,026	9,547
Rest of the World
Geographic sources of revenue and locations of long-lived assets
Net revenue	$ 20,457	$ 26,133	$ 28,016