DERIVATIVES - Schedule of Company’s Derivatives Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Derivative [Line Items]
Notional Amounts	$ 7,514,457	$ 8,572,796
Derivative Assets	122,123	78,838
Derivative Liabilities	(151,348)	(40,482)
Digital Assets
Derivative [Line Items]
Notional Amounts	2,956,316	1,967,358
Derivative Assets	97,213	72,815
Derivative Liabilities	(122,432)	(33,656)
Foreign currencies
Derivative [Line Items]
Notional Amounts	140,339	391,680
Derivative Assets	887	1,484
Derivative Liabilities	(3,739)	(424)
Equity securities
Derivative [Line Items]
Notional Amounts	2,581,728	4,758,135
Derivative Assets	21,063	1,307
Derivative Liabilities	(21,320)	(5,103)
Interest rates
Derivative [Line Items]
Notional Amounts	1,773,466	1,372,860
Derivative Assets	1,387	465
Derivative Liabilities	(1,768)	(189)
Commodities
Derivative [Line Items]
Notional Amounts	62,608	82,763
Derivative Assets	1,573	2,767
Derivative Liabilities	(2,089)	(1,110)
Digital assets receivable
Derivative [Line Items]
Notional Amounts	6,909	8,527
Derivative Assets	6,389	8,497
Derivative Liabilities	0	0
Embedded derivatives — Digital assets borrowed
Derivative [Line Items]
Notional Amounts	1,940,420	2,728,919
Derivative Assets	429,102	321,651
Derivative Liabilities	(3,151)	(10,000)
Embedded derivatives — Collateral payable
Derivative [Line Items]
Notional Amounts	2,206,275	2,283,590
Derivative Assets	406,041	358,743
Derivative Liabilities	(14,499)	(36,057)
Embedded derivatives — Payable to customer
Derivative [Line Items]
Notional Amounts	4,143	84,235
Derivative Assets	344	854
Derivative Liabilities	$ 0	$ 0