FHLBNY ADVANCES - Narrative (Details) - Federal Home Loan Bank of New York - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Borrowings total	$ 773.0	$ 1,310.0
Borrowings	1,760.0	$ 1,190.0
Callable advances	$ 0.0

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