Property and Equipment, net - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 115,047	$ 101,001
Less: Accumulated depreciation	(48,106)	(29,611)
Total property and equipment, net	66,941	71,390
Computer equipment, software, and internally developed software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	65,973	53,862
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,705	3,575
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,067	4,410
Capitalized facility leases
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,302	39,154
Less: Accumulated depreciation	$ (1,200)	$ (200)