Annual report [Section 13 and 15(d), not S-K Item 405]

SECURITIES REPURCHASE AGREEMENT OBLIGATIONS - Schedule of trading securities including collateralized securities subject to repurchase agreements (Details)

v3.26.1
SECURITIES REPURCHASE AGREEMENT OBLIGATIONS - Schedule of trading securities including collateralized securities subject to repurchase agreements (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 1,024,923 $ 1,418,443
Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 982,718 1,328,959
30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 42,205 $ 89,484
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 17.87% 15.74%
Securities repurchase agreement obligations $ 798,130 $ 907,304
Non-US sovereign debt | Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 798,130 904,940
Non-US sovereign debt | 30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 0 $ 2,364
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 17.78% 15.95%
Securities repurchase agreement obligations $ 225,782 $ 510,692
Corporate debt | Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 183,577 423,572
Corporate debt | 30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 42,205 $ 87,120
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 16.25% 3.25%
Securities repurchase agreement obligations $ 1,011 $ 447
Corporate equity | Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 1,011 447
Corporate equity | 30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 0 $ 0