Quarterly report pursuant to Section 13 or 15(d)

MARGIN LENDING, BROKERAGE AND OTHER RECEIVABLES, NET - Narrative (Details)

v3.24.0.1
MARGIN LENDING, BROKERAGE AND OTHER RECEIVABLES, NET - Narrative (Details) - USD ($)
Dec. 31, 2023
Mar. 31, 2023
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]    
Collateral received, fair value $ 6,684,629,000 $ 1,418,129,000
Collateralized financings 2,799,940,000  
Brokerage and other receivables 961,392,000 376,329,000
Brokerage and other receivables due from related party $ 27,166,000 $ 290,195,000
Due from related party customer (in percent) 3.00% 78.00%
Margin lending receivable $ 193,700 $ 37,100
Total allowance for credit losses $ 11,926,000 $ 12,507,000
FST Belize    
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]    
Margin lending receivables from related party as a percentage of related party margin lending receivables (in percent) 63.00% 98.00%
Margin lending receivables    
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]    
Brokerage and other receivables $ 941,456,000 $ 361,684,000
One    
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]    
Collateralized financings $ 200,320,000  
Collateral, percentage 42.00%