Income Taxes - Schedule of Reconciliation of Gross Unrecognized Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at the beginning of the period	$ 21,264	$ 10,887	$ 1,172
Additions for tax positions related to the current year	10,614	10,452	8,789
Increases related to prior year tax positions	24	0	947
Decreases related to prior year tax positions	0	(52)	0
Decreases based on settlements with taxing authorities	0	0	(21)
Lapse of statute of limitations	0	(23)	0
Unrecognized tax benefits at the end of the period	$ 31,902	$ 21,264	$ 10,887