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BORROWINGS (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Residential and commercial mortgage loans pledged $ 343.7  
Long-term fixed rate advances $ 36.7 $ 44.6
Federal funds rate | Minimum    
Debt Instrument [Line Items]    
Variable rate spread on debt instrument 20.00%  
Federal funds rate | Maximum    
Debt Instrument [Line Items]    
Variable rate spread on debt instrument 30.00%  
ACBB    
Debt Instrument [Line Items]    
Secured borrowing potential $ 10.0  
Ability to borrow capacity 10.0  
FHLBNY    
Debt Instrument [Line Items]    
Secured borrowing potential 343.7  
Ability to borrow capacity 183.4  
Term advances $ 114.8 $ 175.3
Weighted average interest rate 2.67% 2.66%