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SEGMENT INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Revenue and long-lived assets by geography
Revenue	$ 742,249	$ 640,600
Long-lived assets (excluding goodwill and intangible assets)	293,282		270,512
United States
Revenue and long-lived assets by geography
Revenue	514,614	445,660
Long-lived assets (excluding goodwill and intangible assets)	271,502		251,379
All other countries
Revenue and long-lived assets by geography
Revenue	227,635	194,940
Long-lived assets (excluding goodwill and intangible assets)	$ 21,780		$ 19,133

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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