SEGMENT INFORMATION - SCHEDULE OF GEOGRAPHIC INFORMATION ABOUT REVENUE AND LONG-LIVED ASSETS (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Revenue and long-lived assets by geography
Revenue	$ 764,102	$ 838,561	$ 2,328,720	$ 2,382,205
Long-lived assets (excluding goodwill and intangible assets)	317,277		317,277		$ 302,817
Reportable Geographical Components | United States
Revenue and long-lived assets by geography
Revenue	567,132	619,297	1,721,348	1,755,534
Long-lived assets (excluding goodwill and intangible assets)	292,586		292,586		279,913
Reportable Geographical Components | All Other Countries
Revenue and long-lived assets by geography
Revenue	196,970	$ 219,264	607,372	$ 626,671
Long-lived assets (excluding goodwill and intangible assets)	$ 24,691		$ 24,691		$ 22,904