GOODWILL, INTANGIBLE ASSETS, DERIVATIVES, AND DIGITAL ASSETS - Schedule of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2026 USD ($)
Goodwill [Line Items]
Beginning balance	$ 62,211
Foreign currency translation	(269)
Ending balance	61,942
Options
Goodwill [Line Items]
Beginning balance	0
Foreign currency translation	0
Ending balance	0
Futures
Goodwill [Line Items]
Beginning balance	43,736
Foreign currency translation	0
Ending balance	43,736
Equities
Goodwill [Line Items]
Beginning balance	0
Foreign currency translation	0
Ending balance	0
International
Goodwill [Line Items]
Beginning balance	18,475
Foreign currency translation	(269)
Ending balance	$ 18,206