Quarterly report pursuant to Section 13 or 15(d)

CUSTOMER LIABILITIES - Schedule of customer liabilities (Details)

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CUSTOMER LIABILITIES - Schedule of customer liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Revenue, Major Customer [Line Items]    
Total non-interest-bearing accounts $ 1,344,527 $ 1,052,758
Customer liabilities 2,699,912 2,273,830
Term Deposits    
Revenue, Major Customer [Line Items]    
Term deposits $ 1,355,385 $ 1,221,072
Term Deposits | Minimum    
Revenue, Major Customer [Line Items]    
Debt securities, interest rate during period (in percent) 0.10% 0.04%
Term Deposits | Maximum    
Revenue, Major Customer [Line Items]    
Debt securities, interest rate during period (in percent) 17.30% 17.30%
Brokerage customers    
Revenue, Major Customer [Line Items]    
Total non-interest-bearing accounts $ 973,577 $ 742,902
Current customer accounts    
Revenue, Major Customer [Line Items]    
Total non-interest-bearing accounts $ 370,950 $ 309,856