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FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Advances from Federal Home Loan Banks	$ 105,000	$ 105,000
FHLB interest rate	3.20%	3.20%
FHLB advance	$ 515,000
FHLB advance rate	0.52%
Cash flow hedge, term	4 years
Overnight borrowings with FHLB	$ 515,000	$ 128,100
Unused commitments from FHLB	1,100,000
Unused short-term or overnight borrowings from correspondent banks	22,000
Unused short-term or overnight borrowings from FRB	1,400,000
Transaction amount from FHLB advance	500,000
Interest Rate Swap [Member]
Debt Instrument [Line Items]
FHLB advance	15,000
Federal Reserve Bank of New York [Member]
Debt Instrument [Line Items]
Overnight borrowings with FHLB	0	0
Residential Mortgage [Member]
Debt Instrument [Line Items]
Mortgages pledged as collateral for advances	334,000	347,500
Multifamily Property [Member]
Debt Instrument [Line Items]
Mortgages pledged as collateral for advances	730,700	773,100,000
Securities [Member]
Debt Instrument [Line Items]
Mortgages pledged as collateral for advances	$ 148,800	$ 154,300

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Amount of unused borrowing capacity under the short-term or overnight borrowings financing arrangement with correspondent banks.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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The calculated weighted average interest rate for Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

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Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

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

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