Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE (Details)

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TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE (Details) - USD ($)
Jun. 30, 2021
Mar. 31, 2021
Trading securities $ 825,364,000 $ 736,188,000
Total Available-for-sale securities, at fair value 1,000 1,000
Corporate debt [Member]    
Trading securities 447,283,000 334,763,000
Preferred Shares    
Total Available-for-sale securities, at fair value 0 1,000
Equity securities    
Total Available-for-sale securities, at fair value 1,000 1,000
Total Available-for-sale securities, at fair values 1 0
Non-U.S. sovereign debt    
Trading securities 302,086,000 333,619,000
U.S. sovereign debt    
Trading securities 13,041,000 10,828,000
Corporate equity    
Trading securities 49,920,000 47,340,000
Exchange traded notes    
Trading securities $ 13,034,000 $ 9,638,000