Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 9,600	$ 7,400	$ 4,900
Assets not yet placed in service	3,914	$ 1,174
Software development
Property, Plant and Equipment [Line Items]
Assets not yet placed in service	$ 1,700