Common Stock and Stockholders' Equity - Summary of Stock Option and RSU Award Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		9 Months Ended	12 Months Ended
	May 06, 2016	Sep. 30, 2017	Dec. 31, 2016
Shares Available for Grant
Outstanding — January 1, 2017		6,039
Increase in authorized shares, shares		4,833
Stock options granted, shares		(998)
RSUs granted, shares		(3,068)
Stock options forfeited or canceled, shares		288
RSUs forfeited or canceled, shares		995
Outstanding — September 30, 2017		8,089	6,039
Number of Shares
Balance at the beginning of the period, shares		8,479
Stock options granted, shares	1,200	998
Stock options exercised, shares		(1,771)
Stock options forfeited or canceled, shares		(288)
Stock options forfeited and unavailable for grant, shares		(200)
Balance at the end of the period, shares		7,218	8,479
Weighted-Average Exercise Price
Balance at the beginning of the period (usd per share)		$ 14.52
Stock options granted (usd per share)		27.03
Stock options exercised (usd per share)		10.47
Stock options forfeited or canceled (usd per share)		23.81
Stock options forfeited and unavailable for grant (usd per share)		23.44
Balance at the end of the period (usd per share)		$ 16.63	$ 14.52
Weighted Average Remaining Contractual Term
Weighted Average Remaining Contractual Term		7 years 2 months 15 days	7 years 5 months 27 days
Aggregate Intrinsic Value
Aggregate intrinsic value, beginning		$ 66,449
Aggregate intrinsic value, ending		$ 90,199	$ 66,449
RSUs Outstanding
Outstanding RSUs
Balance at the beginning of the period, shares		6,936
RSUs granted, shares		3,068
RSUs vested, shares		(2,343)
RSUs forfeited or canceled, shares		(995)
RSUs forfeited and unavailable for grant, shares		(202)
Balance at the end of the period, shares		6,464	6,936
Weighted-Average Grant Date Fair Value
Balance at the beginning of the period (usd per share)		$ 20.81
Weighted average grant date fair value, RSUs granted (usd per share)		27.69
Weighted average grant date fair value, RSUs vested (usd per share)		20.11
Weighted average grant date fair value, RSUs forfeited or canceled (usd per share)		22.11
Weighted average grant date fair value, forfeited and unavailable for grant (usd per share)		23.44
Balance at the end of the period (usd per share)		$ 24.05	$ 20.81