GOODWILL, INTANGIBLE ASSETS, DERIVATIVES, AND DIGITAL ASSETS - Schedule Of Carrying Value of Intangible Assets by Segment (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2026 USD ($)
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning balance	$ 170,774
Amortization	(633)
Foreign currency translation	(1,122)
Ending balance	169,019
Options
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning balance	0
Amortization	0
Foreign currency translation	0
Ending balance	0
Futures
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning balance	88,812
Amortization	(203)
Foreign currency translation	0
Ending balance	88,609
Equities
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning balance	0
Amortization	0
Foreign currency translation	0
Ending balance	0
International
Intangible Assets, Net (Excluding Goodwill) [Roll Forward]
Beginning balance	81,962
Amortization	(430)
Foreign currency translation	(1,122)
Ending balance	$ 80,410