Annual report pursuant to Section 13 and 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 ($)
Mar. 31, 2021
Mar. 31, 2020
Total Trading securities $ 736,188,000 $ 156,544,000
Total Available-for-sale securities, at fair value 1,000 6,438,000
Trading securities 736,188,000 156,544,000
Level 1    
Total Available-for-sale securities, at fair value 0 672,000
Trading securities 717,118,000 145,285,000
Level 2    
Total Available-for-sale securities, at fair value 0 5,765,000
Trading securities 1,000 0
Level 3    
Total Available-for-sale securities, at fair value 1,000 1,000
Trading securities 19,069,000 11,259,000
Non-U.S. sovereign debt    
Trading securities $ 333,619,000 $ 28,495,000
Trading securities, Weighted average interest rate 8.06% 5.22%
Non-U.S. sovereign debt | Level 1    
Trading securities $ 333,619,000 $ 28,495,000
Non-U.S. sovereign debt | Level 2    
Trading securities 0 0
Non-U.S. sovereign debt | Level 3    
Trading securities 0 0
U.S. sovereign debt    
Trading securities $ 10,828,000 0
Trading securities, Weighted average interest rate 1.68%  
U.S. sovereign debt | Level 1    
Trading securities $ 10,828,000  
U.S. sovereign debt | Level 2    
Trading securities 0  
U.S. sovereign debt | Level 3    
Trading securities 0  
Exchange traded notes    
Trading securities 9,638,000 0
Exchange traded notes | Level 1    
Trading securities 9,638,000  
Exchange traded notes | Level 2    
Trading securities 0  
Exchange traded notes | Level 3    
Trading securities 0  
Certificate of deposit    
Total Available-for-sale securities, at fair value 0 $ 5,076,000
Total available-for-sale securities, Weighted average interest rate   0.66%
Certificate of deposit | Level 1    
Total Available-for-sale securities, at fair value   $ 0
Certificate of deposit | Level 2    
Total Available-for-sale securities, at fair value   5,076,000
Certificate of deposit | Level 3    
Total Available-for-sale securities, at fair value   0
Preferred Shares    
Total Available-for-sale securities, at fair value 0 284,000
Total Available-for-sale securities   284,000
Preferred Shares | Level 1    
Total Available-for-sale securities, at fair value   0
Preferred Shares | Level 2    
Total Available-for-sale securities, at fair value   284,000
Preferred Shares | Level 3    
Total Available-for-sale securities, at fair value   0
Corporate debt    
Total Available-for-sale securities, at fair value   405,000
Trading securities $ 334,763,000 $ 58,519,000
Trading securities, Weighted average interest rate 9.22% 9.51%
Total available-for-sale securities, Weighted average interest rate   6.48%
Corporate debt | Level 1    
Total Available-for-sale securities, at fair value   $ 0
Trading securities $ 334,403,000 58,519,000
Corporate debt | Level 2    
Total Available-for-sale securities, at fair value   405,000
Trading securities 0 0
Corporate debt | Level 3    
Total Available-for-sale securities, at fair value   0
Trading securities 360,000 0
Corporate equity    
Total Available-for-sale securities, at fair value 1,000 1,000
Trading securities 47,340,000 69,530,000
Corporate equity | Level 1    
Total Available-for-sale securities, at fair value 0 0
Trading securities 28,630,000 58,271,000
Corporate equity | Level 2    
Total Available-for-sale securities, at fair value 0 0
Trading securities 1,000 0
Corporate equity | Level 3    
Total Available-for-sale securities, at fair value 1,000 1,000
Trading securities 18,709,000 11,259,000
Mutual investment funds    
Total Available-for-sale securities, at fair value $ 0 672,000
Mutual investment funds | Level 1    
Total Available-for-sale securities, at fair value   672,000
Mutual investment funds | Level 2    
Total Available-for-sale securities, at fair value   0
Mutual investment funds | Level 3    
Total Available-for-sale securities, at fair value   $ 0