Annual report [Section 13 and 15(d), not S-K Item 405]

INVESTMENT SECURITIES - Schedule of trading and available-for-sale securities (Details)

v3.26.1
INVESTMENT SECURITIES - Schedule of trading and available-for-sale securities (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Mar. 31, 2025
Debt and Equity Securities, FV-NI [Line Items]    
Investment securities $ 2,339,100 $ 2,275,286
Total available-for-sale securities, at fair value 574,038 473,587
Total 429,423 65,860
Total investment securities 3,342,561 2,814,733
Non-US sovereign debt    
Debt and Equity Securities, FV-NI [Line Items]    
Investment securities 1,337,577 1,282,450
Total available-for-sale securities, at fair value 240,453 208,231
Non-US sovereign debt 429,660 65,914
Allowance for Non-US sovereign debt (237) (54)
Total 429,423 65,860
Corporate debt    
Debt and Equity Securities, FV-NI [Line Items]    
Investment securities 793,850 807,985
Total available-for-sale securities, at fair value 311,604 243,730
Corporate equity    
Debt and Equity Securities, FV-NI [Line Items]    
Investment securities 166,394 106,227
US sovereign debt    
Debt and Equity Securities, FV-NI [Line Items]    
Investment securities 33,060 73,787
Total available-for-sale securities, at fair value 21,981 21,626
Exchange traded notes    
Debt and Equity Securities, FV-NI [Line Items]    
Investment securities $ 8,219 $ 4,837