MARGIN LENDING, BROKERAGE AND OTHER RECEIVABLES, NET - Schedule of brokerage and other receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
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
Receivables from telecommunication services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total margin lending, brokerage and other receivables, net	9,985	0
Bank commissions receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total margin lending, brokerage and other receivables, net	7,529	11,574
Bond coupon receivable and dividends accrued
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total margin lending, brokerage and other receivables, net	6,832	5,429
Receivables from brokerage customers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total margin lending, brokerage and other receivables, net	2,399	2,603
Receivable for underwriting and market-making services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total margin lending, brokerage and other receivables, net	1,577	1,278
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total margin lending, brokerage and other receivables, net	$ 15,510	$ 16,004