Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 15,937	$ 6,730	$ 5,345
Cost of Revenue [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	11,751	4,238	3,516
General and Administrative Expense [Member]
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 4,186	$ 2,492	$ 1,829