Property and Equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 101,001	$ 50,655
Less: Accumulated depreciation	(29,611)	(19,924)
Total property and equipment, net	71,390	30,731
Computer equipment, software, and internally developed software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	53,862	37,110
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,575	2,335
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,410	4,611
Capitalized facility leases
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,154	$ 6,599
Less: Accumulated depreciation	$ (200)