Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of present securities assets at fair value (Details)

v3.22.0.1
TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of present securities assets at fair value (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 1,348,656 $ 736,188
Fair value of equity securities 1 1
Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 1,339,474 717,118
Fair value of equity securities 0 0
Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 7,417 1
Fair value of equity securities 0 0
Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 1,765 19,069
Fair value of equity securities $ 1 $ 1
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted Average Interest Rate 8.80% 9.22%
Trading securities $ 624,247 $ 334,763
Corporate debt | Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 623,463 334,403
Corporate debt | Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 415 0
Corporate debt | Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 369 $ 360
Non-U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted Average Interest Rate 9.35% 8.06%
Trading securities $ 451,437 $ 333,619
Non-U.S. sovereign debt | Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 448,895 333,619
Non-U.S. sovereign debt | Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 1,593 0
Non-U.S. sovereign debt | Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 949 $ 0
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted Average Interest Rate 0.00% 0.00%
Trading securities $ 161,550 $ 47,340
Corporate equity | Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 155,694 28,630
Corporate equity | Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 5,409 1
Corporate equity | Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 447 $ 18,709
US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted Average Interest Rate 2.00% 1.68%
Trading securities $ 6,960 $ 10,828
US sovereign debt | Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 6,960 10,828
US sovereign debt | Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
US sovereign debt | Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 0 $ 0
Exchange traded notes    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted Average Interest Rate 0.00% 0.00%
Trading securities $ 104,462 $ 9,638
Exchange traded notes | Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 104,462 9,638
Exchange traded notes | Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Exchange traded notes | Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 0 $ 0
Equity securities    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted Average Interest Rate 0.00% 0.00%
Fair value of equity securities $ 1 $ 1
Equity securities | Quoted Prices in Active Markets for Identical Assets    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of equity securities 0 0
Equity securities | Significant Other Observable Inputs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of equity securities 0 0
Equity securities | Significant Unobservable Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of equity securities $ 1 $ 1