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SEGMENT INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Revenue and long-lived assets by geographical information
Revenue	$ 516,884	$ 412,966	$ 1,462,501	$ 1,185,388
Long-lived assets (excluding goodwill and intangible assets)	260,003		260,003		267,928
United States
Revenue and long-lived assets by geographical information
Revenue	393,398	345,259	1,150,895	989,930
Long-lived assets (excluding goodwill and intangible assets)	250,117		250,117		267,060
All other countries
Revenue and long-lived assets by geographical information
Revenue	123,486	67,707	311,606	195,458
Long-lived assets (excluding goodwill and intangible assets)	$ 9,886		$ 9,886		$ 868

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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