Property and Equipment, Net - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Computer software	$ 13,883	$ 14,688
Telecommunications, network and computing equipment	22,829	16,459
Leasehold improvements	9,832	6,687
Furniture, fixtures and office equipment	4,229	3,569
Cost of assets placed in service	50,773	41,403
Less accumulated depreciation and amortization	(24,202)	(18,373)
Net book value of assets placed in service	26,571	23,030
Assets not yet placed in service	3,914	1,174
Property and equipment, net	$ 30,485	$ 24,204