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]
Property, Plant and Equipment, Gross	$ 296,666	$ 241,853
Construction in progress and facility lease obligation	231,700	196,000
Depreciation and amortization expense	3,800	4,700	$ 4,100
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 246,669	$ 196,027