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
Sep. 30, 2024
Mar. 31, 2024
Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days $ 121,493 $ 134,961
Total $ 121,493 $ 134,961
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 1.00%  
Corporate equity | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 12.96% 14.57%
Up to 30 days $ 73,001 $ 96,647
Total $ 73,001 $ 96,647
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.38% 13.84%
Corporate debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 11.28% 5.31%
Up to 30 days $ 26,473 $ 8,961
Total $ 26,473 $ 8,961
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.41% 13.78%
Non-US sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 5.86% 4.45%
Up to 30 days $ 12,801 $ 12,468
Total $ 12,801 $ 12,468
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 3.00% 3.06%
U.S. sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 8.88% 4.77%
Up to 30 days $ 9,218 $ 16,885
Total $ 9,218 $ 16,885