Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Payable and Accrued Liabilities, Current [Abstract]
Payroll and other related benefits	$ 150,784	$ 110,822
Bandwidth and co-location	72,782	61,084
Property, use and other taxes	47,584	52,858
Professional service fees	4,225	4,277
Other accrued expenses	8,368	9,736
Total	283,743	238,777
Deferred rent	31,510	29,668
Uncertain tax positions	86,814	73,231
Other long-term liabilities	24,631	15,792
Total	$ 142,955	$ 118,691