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
Jun. 30, 2022
Mar. 31, 2022
Revenue, Major Customer [Line Items]    
Customer liabilities $ 1,652,643 $ 1,416,954
Brokerage customers    
Revenue, Major Customer [Line Items]    
Customer liabilities 1,104,135 1,078,048
Banking customers    
Revenue, Major Customer [Line Items]    
Customer liabilities $ 548,508 $ 338,906