MARGIN LENDING, BROKERAGE AND OTHER RECEIVABLES, NET - Narrative (Details) $ in Thousands |
Mar. 31, 2025
USD ($)
customer
|
Mar. 31, 2024
USD ($)
customer
|
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Collateral received, fair value | $ 7,312,950 | $ 2,824,498 |
| Total margin lending, brokerage and other receivables, net | 3,319,145 | 1,660,275 |
| Allowance for receivables | 19,256 | 11,990 |
| Margin lending receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total margin lending, brokerage and other receivables, net | $ 3,294,569 | $ 1,635,377 |
| Nonrelated Party | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Number of customers with a margin lending balance exceeding ten percent | customer | 3 | 1 |
| Collateralized financings | $ 3,218,277 | $ 460,771 |
| Nonrelated Party | Margin lending receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total margin lending, brokerage and other receivables, net | $ 2,323,461 | $ 399,196 |