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FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Additional Information (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Unused short-term overnight borrowing capacity from FHLB	$ 1,800,000,000
Unused short-term or overnight borrowings from correspondent banks	15,000,000
Unused short-term or overnight borrowings from FRB	2,400,000,000
Federal Reserve Bank of New York [Member]
Debt Instrument [Line Items]
Overnight borrowings with FHLB	$ 0	$ 0

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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