Quarterly report [Sections 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, 2025
Mar. 31, 2025
Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days $ 160,645 $ 81,118
30-90 days 1,772  
Total $ 162,417 $ 81,118
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 16.73% 15.74%
Non-US sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 14.08% 4.48%
Up to 30 days $ 89,402 $ 4,436
30-90 days 1,772  
Total $ 91,174 $ 4,436
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate   3.25%
Corporate equity | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 16.64% 17.05%
Up to 30 days $ 66,510 $ 58,202
30-90 days 0  
Total $ 66,510 $ 58,202
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 16.99% 15.95%
Corporate debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.34% 13.27%
Up to 30 days $ 3,680 $ 16,644
30-90 days 0  
Total $ 3,680 $ 16,644
U.S. sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 3.25% 16.75%
Up to 30 days $ 1,053 $ 1,836
30-90 days 0  
Total $ 1,053 $ 1,836