Earnings Per Share - Computation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income	$ 137,762	$ 242,317	$ 108,318
Denominator:
Weighted-average shares outstanding—basic	476,851	462,865	445,329
Effect of dilutive securities	21,689	27,016	32,732
Weighted-average shares outstanding—diluted	498,540	489,881	478,061
Basic EPS	$ 0.29	$ 0.52	$ 0.24
Diluted EPS	$ 0.28	$ 0.49	$ 0.23
Anti-dilutive equity awards under stock-based award plans excluded from the determination of diluted EPS	1,699	316	6,915