COLLATERALIZED ARRANGEMENTS AND FINANCING - Assets pledged as collateral against crypto borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Crypto Asset, Holding [Line Items]
Assets	$ 27,385,314	$ 29,671,832
Asset Pledged as Collateral without Right
Crypto Asset, Holding [Line Items]
Assets	434,163	236,308
Payment stablecoins \| Asset Pledged as Collateral without Right
Crypto Asset, Holding [Line Items]
Assets	58,678	236,308
Other crypto assets \| Asset Pledged as Collateral without Right
Crypto Asset, Holding [Line Items]
Assets	$ 375,485	$ 0

Amount of asset recognized for present right to economic benefit.

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+ Details