Quarterly report [Sections 13 or 15(d)]

BORROWINGS (Narrative) (Details)

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BORROWINGS (Narrative) (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Subordinated Borrowing [Line Items]    
Remaining available balance for the federal funds lines $ 597.0 $ 597.0
Maximum collateral dependent line of credit with the FHLB 7,300.0 7,400.0
Remaining borrowing capacity 25.0 25.0
Remaining available borrowings from the Federal Reserve Discount Window 2,800.0 3,000.0
Amount of funds used from the Federal Reserve Discount Window. 0.0 0.0
FHLB Secured Line Of Credit    
Subordinated Borrowing [Line Items]    
Maximum collateral dependent line of credit with the FHLB 2,800.0 2,800.0
Remaining credit availability on collateral dependent line of credit with the FHLB $ 2,500.0 $ 2,400.0