Stock Incentive Plans - Summary of Options Outstanding Vested and Expected to Vest (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Number of vested shares (in shares) | shares	930
Number of shares expected to vest (in shares) | shares	954
Number of shares total (in shares) | shares	1,884
Weighted-average exercise price vested (in dollars per share) | $ / shares	$ 19.07
Weighted-average exercise price expected to vest (in dollars per share) | $ / shares	$ 36.87
Weighted-average remaining contractual life vested (in years)	6 years 8 months 8 days
Weighted-average remaining contractual life expected to vest (in years)	8 years 4 months 2 days
Aggregate intrinsic value vested | $	$ 41,278
Aggregate intrinsic value expected to vest | $	28,184
Aggregate intrinsic value total | $	$ 69,462