Common Stock and Stockholders' Equity - Summary of Stock Option and RSU Award Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Shares Available for Grant
Balance at the beginning of the period	4,323,000
Increase in authorized shares	4,516,000
Stock options granted	(110,000)
RSUs granted	(1,426,000)
Stock options forfeited or canceled	72,000
RSUs forfeited or cancelled	91,000
Balance at the end of the period	7,466,000	4,323,000
Number of Shares
Balance at the beginning of the period	10,778,000
Stock options granted	110,000
Stock options exercised	(386,000)
Stock options forfeited or canceled	(72,000)
Balance at the end of the period	10,430,000	10,778,000
Weighted-Average Exercise Price
Balance at the beginning of the period	$ 11.94
Stock options granted	18.48
Stock options exercised	4.96
Stock options forfeited or canceled	24.32
Balance at the end of the period	$ 12.18	$ 11.94
Weighted Average Remaining Contractual Term
Options Outstanding, Weighted-average remaining contractual term	7 years 9 months 11 days	7 years 11 months 16 days
Aggregate Intrinsic Value
Options Outstanding, Aggregate Intrinsic Value, Balance at beginning of period	$ 156,262
Options Outstanding, Aggregate Intrinsic Value, Balance at end of period	$ 91,213	$ 156,262
Outstanding RSUs
Balance at the beginning of the period	6,417,000
RSUs granted	1,426,000
RSUs vested	(785,000)
RSUs forfeited or cancelled	(91,000)
Balance at the end of the period	6,967,000	6,417,000
Weighted-Average Grant Date Fair Value
Balance at the beginning of the period	$ 19.54
RSUs granted	14.77
RSUs vested	16.70
RSUs forfeited or cancelled	20.67
Balance at the end of the period	$ 18.87	$ 19.54