Annual report pursuant to Section 13 and 15(d)

FEE AND COMMISSION INCOME (Details)

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FEE AND COMMISSION INCOME (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Schedule of Fee and Commission income [Line Items]      
Brokerage services $ 333,383 $ 286,732 $ 318,698
Commission income from payment processing 41,659 6,385  
Bank services 25,180 17,964 6,727
Underwriting and market-making services 18,801 11,948 5,963
Other fee and commission income 21,310 4,186 3,823
Total fee and commission income 440,333 327,215 335,211
Brokerage      
Schedule of Fee and Commission income [Line Items]      
Brokerage services 333,383 286,732 318,698
Commission income from payment processing 0 0  
Bank services 0 0 0
Underwriting and market-making services 18,801 11,948 5,963
Other fee and commission income 297 390 2,391
Total fee and commission income 352,481 299,070 327,052
Banking      
Schedule of Fee and Commission income [Line Items]      
Brokerage services 0 0 0
Commission income from payment processing 0 0  
Bank services 25,180 17,964 6,727
Underwriting and market-making services 0 0 0
Other fee and commission income 1,056 244 273
Total fee and commission income 26,236 18,208 7,000
Insurance      
Schedule of Fee and Commission income [Line Items]      
Brokerage services 0 0 0
Commission income from payment processing 0 0  
Bank services 0 0 0
Underwriting and market-making services 0 0 0
Other fee and commission income 296 128 83
Total fee and commission income 296 128 83
Other      
Schedule of Fee and Commission income [Line Items]      
Brokerage services 0 0 0
Commission income from payment processing 41,659 6,385  
Bank services 0 0 0
Underwriting and market-making services 0 0 0
Other fee and commission income 19,661 3,424 1,076
Total fee and commission income $ 61,320 $ 9,809 $ 1,076