Stockholders Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Oct. 14, 2016	Mar. 31, 2017	Mar. 31, 2016
Stockholders Equity Note [Line Items]
Weighted-average grant date fair value of options granted		$ 22.86	$ 36.28
Non Vested Stock Options
Stockholders Equity Note [Line Items]
Estimated unrecognized employee compensation cost related to non-vested stock options granted		$ 114.6
Estimated unrecognized employee compensation cost related to non-vested stock options granted, Weighted-average period of recognition		1 year 8 months 12 days
Restricted Stock Units
Stockholders Equity Note [Line Items]
Estimated unrecognized employee compensation cost related to non-vested stock options granted		$ 23.9
Estimated unrecognized employee compensation cost related to non-vested stock options granted, Weighted-average period of recognition		2 years 3 months 18 days
Shares vesting period	3 years
Shares vesting start date	Jul. 19, 2016
Shares vesting description	These restricted stock units vest over three years in six equal installments on each six month anniversary of the vesting start date, July 19, 2016.
2011 Plan
Stockholders Equity Note [Line Items]
Common stock shares reserved for issuance		10,529,412
Maximum | 2011 Plan
Stockholders Equity Note [Line Items]
Stock options granted, term		10 years