Accrued Expenses and Other Current Liabilities (Schedule of Accrued Expenses and Other Current Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Accounts Payable and Accrued Liabilities, Current [Abstract]
Payroll and other related benefits	$ 58,158	$ 39,920
Bandwidth and co-location	31,535	29,291
Property, use and other taxes	35,573	9,923
Professional service fees	4,238	4,162
Other	2,112	2,075
Total	$ 131,616	$ 85,371