Annual report pursuant to Section 13 and 15(d)

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

v3.22.1
TRADING AND AVAILABLE-FOR-SALE SECURITIES AT FAIR VALUE - Schedule of present securities assets at fair value (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 1,203,479 $ 736,188
Fair value of equity securities 1 1
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 1,189,293 717,118
Fair value of equity securities 0 0
Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 5,042 1
Fair value of equity securities 0 0
Significant unobservable units (Level 3)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 9,144 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 (in percent) 9.61% 9.22%
Trading securities $ 738,394 $ 334,763
Corporate debt | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 737,799 334,403
Corporate debt | Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Corporate debt | Significant unobservable units (Level 3)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 595 $ 360
Non-US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average interest rate (in percent) 13.11% 8.06%
Trading securities $ 357,071 $ 333,619
Non-US sovereign debt | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 348,775 333,619
Non-US sovereign debt | Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Non-US sovereign debt | Significant unobservable units (Level 3)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 8,296 $ 0
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average interest rate (in percent) 0.00% 0.00%
Trading securities $ 91,254 $ 47,340
Corporate equity | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 85,959 28,630
Corporate equity | Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 5,042 1
Corporate equity | Significant unobservable units (Level 3)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 253 $ 18,709
US sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average interest rate (in percent) 2.36% 1.68%
Trading securities $ 10,306 $ 10,828
US sovereign debt | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 10,306 10,828
US sovereign debt | Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
US sovereign debt | Significant unobservable units (Level 3)    
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 (in percent) 0.00% 0.00%
Trading securities $ 6,454 $ 9,638
Exchange traded notes | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 6,454 9,638
Exchange traded notes | Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Exchange traded notes | Significant unobservable units (Level 3)    
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]    
Total available-for-sale securities, Weighted average interest rate (in percent) 0.00% 0.00%
Fair value of equity securities $ 1 $ 1
Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of equity securities 0 0
Equity securities | Significant Other Observable Inputs (Level 2)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of equity securities 0 0
Equity securities | Significant unobservable units (Level 3)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Fair value of equity securities $ 1 $ 1