Business Segment Information - Summary of Net Revenues and Long-Lived Assets, Related To Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Geographic Information [Abstract]
Net revenues	$ 1,225,565	$ 1,137,147	$ 3,598,295	$ 3,306,661
Reportable Segment
Geographic Information [Abstract]
Net revenues	1,225,565	1,137,147	3,598,295	3,306,661
Long-lived assets	4,107,755		4,107,755		$ 4,178,336
United States \| Reportable Segment
Geographic Information [Abstract]
Net revenues	693,853	662,818	2,087,083	1,929,406
Long-lived assets	4,057,506		4,057,506		4,126,410
Total International \| Reportable Segment
Geographic Information [Abstract]
Net revenues	531,712	474,329	1,511,212	1,377,255
Long-lived assets	50,249		50,249		$ 51,926
Luxembourg \| Reportable Segment
Geographic Information [Abstract]
Net revenues	261,775	268,907	804,948	788,140
Japan \| Reportable Segment
Geographic Information [Abstract]
Net revenues	129,266	152,549	398,297	434,553
Other International \| Reportable Segment
Geographic Information [Abstract]
Net revenues	$ 140,671	$ 52,873	$ 307,967	$ 154,562

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income after deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).