Quarterly report pursuant to Section 13 or 15(d)

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

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SECURITIES REPURCHASE AGREEMENT OBLIGATIONS - Schedule of trading securities including collateralized securities subject to repurchase agreements (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 2,558,794 $ 2,756,596
Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 2,177,472 2,482,004
30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 381,322 $ 274,592
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.63% 13.78%
Securities repurchase agreement obligations $ 1,644,354 $ 1,805,028
Non-US sovereign debt | Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 1,419,612 1,545,080
Non-US sovereign debt | 30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 224,742 $ 259,948
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.64% 13.84%
Securities repurchase agreement obligations $ 904,587 $ 938,396
Corporate debt | Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 748,007 923,752
Corporate debt | 30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 156,580 $ 14,644
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.50% 3.06%
Securities repurchase agreement obligations $ 9,853 $ 13,172
U.S. sovereign debt | Up to 30 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations 9,853 13,172
U.S. sovereign debt | 30-90 days    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Securities repurchase agreement obligations $ 0 $ 0