Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLEFORSALE SECURITIES AT FAIR VALUE (Details 1)

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TRADING AND AVAILABLEFORSALE SECURITIES AT FAIR VALUE (Details 1) - USD ($)
Sep. 30, 2021
Mar. 31, 2021
Total Trading securities $ 974,481,000 $ 736,188,000
Total Available-for-sale securities, at fair value 1,000 1,000
Trading securities 974,481,000 736,188,000
Level 1    
Total Available-for-sale securities, at fair value 0 0
Trading securities 921,474,000 717,118,000
Level 2    
Total Available-for-sale securities, at fair value 0 0
Trading securities 50,291,000 1,000
Level 3    
Total Available-for-sale securities, at fair value 1,000 1,000
Trading securities 2,716,000 19,069,000
Corporate equity    
Trading securities $ 70,377,000 $ 47,340,000
Trading securities, Weighted average interest rate 0.00% 0.00%
Corporate equity | Level 1    
Trading securities $ 19,710,000 $ 28,630,000
Corporate equity | Level 2    
Trading securities 50,291,000 1,000
Corporate equity | Level 3    
Trading securities 376,000 18,709,000
Non-U.S. sovereign debt    
Trading securities $ 261,442,000 $ 333,619,000
Trading securities, Weighted average interest rate 7.88% 8.06%
Non-U.S. sovereign debt | Level 1    
Trading securities $ 259,480,000 $ 333,619,000
Non-U.S. sovereign debt | Level 2    
Trading securities 0 0
Non-U.S. sovereign debt | Level 3    
Total Available-for-sale securities, at fair value 0  
Trading securities 1,962 0
U.S. sovereign debt    
Trading securities $ 7,206,000 $ 10,828,000
Trading securities, Weighted average interest rate 1.60% 1.68%
U.S. sovereign debt | Level 1    
Trading securities $ 7,206,000 $ 10,828,000
U.S. sovereign debt | Level 2    
Trading securities 0 0
U.S. sovereign debt | Level 3    
Trading securities 0 0
Exchange traded notes    
Trading securities $ 17,028,000 $ 9,638,000
Trading securities, Weighted average interest rate 0.00% 0.00%
Exchange traded notes | Level 1    
Trading securities $ 17,028,000 $ 9,638,000
Exchange traded notes | Level 2    
Trading securities 0 0
Exchange traded notes | Level 3    
Trading securities 0 0
Equity securities    
Total Available-for-sale securities, at fair value 1,000 $ 1,000
Trading securities, Weighted average interest rate   0.00%
Equity securities | Level 1    
Total Available-for-sale securities, at fair value 0 $ 0
Equity securities | Level 2    
Total Available-for-sale securities, at fair value 0 0
Equity securities | Level 3    
Total Available-for-sale securities, at fair value 1 1,000
Corporate debt    
Trading securities $ 618,428,000 $ 334,763,000
Trading securities, Weighted average interest rate 8.30% 9.22%
Total available-for-sale securities, Weighted average interest rate 0.00% 0.00%
Corporate debt | Level 1    
Trading securities $ 618,050,000 $ 334,403,000
Corporate debt | Level 2    
Trading securities 0 0
Corporate debt | Level 3    
Trading securities $ 378,000 $ 360,000