Net Income per Share Attributable to Common Stockholders - Computation of Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income	$ 118,000	$ 61,000	$ 130,000	$ (1,999,000)	$ 114,000	$ 128,000	$ 309,000	$ (1,757,000)
Less: Accretion related to Series A redeemable convertible preferred stock	(2,000)			0			(7,000)	0
Net income (loss) attributable to common stockholders, basic	116,000			(1,999,000)			302,000	(1,757,000)
Add: Accretion related to Series A redeemable convertible preferred stock	2,000			0			0	0
Net income (loss) attributable to common stockholders, diluted	$ 118,000			$ (1,999,000)			$ 302,000	$ (1,757,000)
Denominator:
Weighted-average shares used in computing basic net income per share attributable to common stockholders (in shares)	259,660			95,836			266,550	80,180
Weighted-average shares used in computing diluted net income per share attributable to common stockholders (in shares)	281,003			95,836			285,701	80,180
Net income per share attributable to common stockholders, basic (in dollars per share)	$ 0.45			$ (20.86)			$ 1.13	$ (21.92)
Net income per share attributable to common stockholders, diluted (in dollars per share)	$ 0.42			$ (20.86)			$ 1.06	$ (21.92)
Series A Redeemable Convertible Preferred Stock
Denominator:
Weighted-average effect of dilutive securities (in shares)	5,833			0			0	0
Stock options
Denominator:
Weighted-average effect of dilutive securities (in shares)	5,629			0			8,054	0
Restricted stock units
Denominator:
Weighted-average effect of dilutive securities (in shares)	9,881			0			11,097	0
Unvested restricted non-voting common stock
Denominator:
Weighted-average effect of dilutive securities (in shares)	0			0			0	0