REVENUE RECOGNITION - Revenue Recognized According Performance Period (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenues	$ 193,399	$ 167,204	$ 551,038	$ 481,003	$ 655,353
Reporting period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenues	179,388	157,509	531,432	461,641	632,358
Previous periods
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenues	$ 14,011	$ 9,695	$ 19,606	$ 19,362	$ 22,995

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 before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details