Net Income Per Share - Schedule of Computation of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income	$ 23,465	$ 30,065
Denominator:
Weighted-average shares used to compute basic net income per share (in shares)	116,818	114,575
Dilutive effect of employee stock options (in shares)	12,850	7,651
Weighted-average shares used to compute diluted net income per share (in shares)	129,668	122,226
Net income per share
Basic (in dollars per share)	$ 0.20	$ 0.26
Diluted (in dollars per share)	$ 0.18	$ 0.25