Quarterly report pursuant to Section 13 or 15(d)

CASH AND CASH EQUIVALENTS - Schedule of collateralized securities received under reverse repurchase agreements (Details)

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CASH AND CASH EQUIVALENTS - Schedule of collateralized securities received under reverse repurchase agreements (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Mar. 31, 2024
Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days $ 51,685 $ 134,961
Total $ 51,685 $ 134,961
Corporate equity | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.88% 14.57%
Up to 30 days $ 38,605 $ 96,647
Total $ 38,605 $ 96,647
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 14.90% 13.84%
Corporate debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 8.04% 5.31%
Up to 30 days $ 6,421 $ 8,961
Total $ 6,421 $ 8,961
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 14.89% 13.78%
Non-US sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 4.17% 4.45%
Up to 30 days $ 2,674 $ 12,468
Total $ 2,674 $ 12,468
Exchange traded notes | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 7.76%  
Up to 30 days $ 2,551  
Total $ 2,551  
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate   3.06%
U.S. sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 3.25% 4.77%
Up to 30 days $ 1,434 $ 16,885
Total $ 1,434 $ 16,885