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
Dec. 31, 2021
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Remaining contractual maturity: up to 30 days $ 627,493 $ 374,718
Remaining contractual maturity: 30 - 90 days 0 0
Total contractual maturity $ 627,493 $ 374,718
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 0.00% 3.78%
Remaining contractual maturity: up to 30 days $ 0 $ 5,757
Remaining contractual maturity: 30 - 90 days 0 0
Total contractual maturity $ 0 $ 5,757
Non-US sovereign debt one    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 10.51% 9.28%
Remaining contractual maturity: up to 30 days $ 308,878 $ 229,122
Remaining contractual maturity: 30 - 90 days 0 0
Total contractual maturity $ 308,878 $ 229,122
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 10.30% 9.27%
Remaining contractual maturity: up to 30 days $ 314,217 $ 138,029
Remaining contractual maturity: 30 - 90 days 0 0
Total contractual maturity $ 314,217 $ 138,029
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 0.36% 0.40%
Remaining contractual maturity: up to 30 days $ 4,398 $ 1,810
Remaining contractual maturity: 30 - 90 days 0 0
Total contractual maturity $ 4,398 $ 1,810