Net (Loss) Income Per Share - Computation of Basic and Diluted Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net (loss) income attributable to common stockholders	$ (79,423)	$ (173,394)	$ 26,335
Denominator:
Weighted average shares used to compute net (loss) income per share attributable to common stockholders, basic (in shares)	205,132	139,606	116,397
Weighted average effect of potentially dilutive shares to purchase common stock (in shares)	0	0	7,479
Weighted average shares used to compute net (loss) income per share attributable to common stockholders, diluted (in shares)	205,132	139,606	123,876
Net (loss) income per share attributable to common stockholders
Basic (in dollars per share)	$ (0.39)	$ (1.24)	$ 0.23
Diluted (in dollars per share)	$ (0.39)	$ (1.24)	$ 0.21