Income taxes - Reconciliation of Statutory Federal Income Tax Rate - 2024 and 2023 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Tax at U.S. statutory rate	$ 93,637	$ 60,397	$ (3,453)
State and local income taxes, net of benefit	13,203	(120,204)	5,111
Foreign operations	2,344	12,007	17,721
Share-based compensation		(23,019)	(18,925)
Permanent book/tax differences		1,171	692
Change in valuation allowance		(1,421,323)	111,497
Tax credits		(83,587)	(93,887)
Other	(395)	57	414
Provision for (benefit from) income taxes	$ 29,035	$ (1,574,501)	$ 19,170