CONSOLIDATED FINANCIAL STATEMENT DETAILS - SCHEDULE OF COST OF REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cost of revenue:
Cost of service revenue									$ 652,137	$ 734,222	$ 857,825
Cost of product revenue									126,024	125,982	119,532
Cost of revenue	$ 214,084	$ 199,377	$ 177,963	$ 186,737	$ 233,712	$ 218,452	$ 205,295	$ 202,745	$ 778,161	$ 860,204	$ 977,357