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COLLATERALIZED ARRANGEMENTS AND FINANCING - Crypto Assets Held as Collateral and Obligation to Return (Details)
$ in Thousands
Mar. 31, 2024
USD ($)
Unit
Dec. 31, 2023
USD ($)
Unit
Crypto Asset, Activity [Line Items]    
Crypto assets held as collateral $ 106,610 $ 0
Obligation to return collateral 315,090 1,063
Collateral received 1,578,643 712,644
Crypto assets held as collateral   0
Fiat    
Crypto Asset, Activity [Line Items]    
Obligation to return collateral $ 208,480 $ 1,063
Bitcoin    
Crypto Asset, Activity [Line Items]    
Obligation to return collateral, units | Unit 1,495 0
Obligation to return collateral $ 106,610 $ 0
Asset Pledged as Collateral    
Crypto Asset, Activity [Line Items]    
Crypto assets held as collateral $ 106,610 $ 0
Bitcoin    
Crypto Asset, Activity [Line Items]    
Units | Unit 9,183  
Bitcoin | Asset Pledged as Collateral    
Crypto Asset, Activity [Line Items]    
Units | Unit 1,495 0
Crypto assets held as collateral $ 106,610 $ 0
Crypto assets held as collateral $ 75,400