Quarterly report [Sections 13 or 15(d)]

BORROWINGS (Narrative) (Details)

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BORROWINGS (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Subordinated Borrowing [Line Items]    
Federal funds lines with correspondent banks $ 1,410,000 $ 1,410,000
Maximum collateral dependent line of credit with the FHLB 11,200,000 11,100,000
Alternative line of credit with correspondent bank 25,000 25,000
Federal Reserve Discount Window 2,418,498 2,573,492
FHLB secured line of credit 5,628,019 5,277,231
FHLB Secured Line Of Credit    
Subordinated Borrowing [Line Items]    
Maximum collateral dependent line of credit with the FHLB $ 6,000,000 $ 5,900,000