Net income (loss) per share - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Denominator:
Weighted-average shares used in computing net income (loss) per share, basic (in shares)	674,706	678,831	674,641
Basic net income (loss) per share (in dollars per share)	$ 0.62	$ 2.74	$ (0.05)
Denominator:
Weighted-average shares used in computing net income (loss) per share, basic (in shares)	674,706	678,831	674,641
Weighted-average shares used in computing net income (loss) per share, diluted (in shares)	687,771	698,376	674,641
Diluted net income (loss) per share (in dollars per share)	$ 0.61	$ 2.67	$ (0.05)
Class A
Numerator:
Net income (loss)	$ 366,667	$ 1,633,901	$ (30,937)
Denominator:
Weighted-average shares used in computing net income (loss) per share, basic (in shares)	593,473	595,639	586,109
Basic net income (loss) per share (in dollars per share)	$ 0.62	$ 2.74	$ (0.05)
Numerator:
Net income (loss)	$ 366,667	$ 1,633,901	$ (30,937)
Reallocation of net income as a result of conversion of Class B to Class A common stock	50,188	228,205	0
Reallocation of net income to Class B common stock	0	0	0
Diluted net income (loss)	$ 416,855	$ 1,862,106	$ (30,937)
Denominator:
Weighted-average shares used in computing net income (loss) per share, basic (in shares)	593,473	595,639	586,109
Conversion of Class B to Class A common stock (in shares)	81,233	83,192	0
Weighted average effect of dilutive potential common stock (in shares)	13,065	19,545	0
Weighted-average shares used in computing net income (loss) per share, diluted (in shares)	687,771	698,376	586,109
Diluted net income (loss) per share (in dollars per share)	$ 0.61	$ 2.67	$ (0.05)
Class B
Numerator:
Net income (loss)	$ 50,188	$ 228,205	$ (4,673)
Denominator:
Weighted-average shares used in computing net income (loss) per share, basic (in shares)	81,233	83,192	88,532
Basic net income (loss) per share (in dollars per share)	$ 0.62	$ 2.74	$ (0.05)
Numerator:
Net income (loss)	$ 50,188	$ 228,205	$ (4,673)
Reallocation of net income as a result of conversion of Class B to Class A common stock	0	0	0
Reallocation of net income to Class B common stock	(953)	(6,387)	0
Diluted net income (loss)	$ 49,235	$ 221,818	$ (4,673)
Denominator:
Weighted-average shares used in computing net income (loss) per share, basic (in shares)	81,233	83,192	88,532
Conversion of Class B to Class A common stock (in shares)	0	0	0
Weighted average effect of dilutive potential common stock (in shares)	0	0	0
Weighted-average shares used in computing net income (loss) per share, diluted (in shares)	81,233	83,192	88,532
Diluted net income (loss) per share (in dollars per share)	$ 0.61	$ 2.67	$ (0.05)