Segment Information (Details 2) - Revenue by Product Categories (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Total net revenue by product categories
Total net revenue	$ 408,103	$ 388,636	$ 375,847	$ 362,200	$ 352,909	$ 335,985	$ 318,990	$ 301,355	$ 1,534,786	$ 1,309,239	$ 1,025,064
Dedicated Cloud
Total net revenue by product categories
Total net revenue									1,119,636	1,005,165	835,877
Public Cloud
Total net revenue by product categories
Total net revenue									$ 415,150	$ 304,074	$ 189,187