v3.25.1
Loan Portfolio and Allowance for Credit Losses, Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty (Details) - Payment Delay [Member]
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]    
Weighted average term 48 months 12 months
New York and Other States [Member]    
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]    
Weighted average term [1] 48 months 12 months
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]    
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]    
Weighted average term 24 months 12 months
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]    
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]    
Weighted average term [1] 24 months 12 months
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]    
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]    
Weighted average term 24 months  
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]    
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]    
Weighted average term [1] 24 months  
[1] Includes New York, New Jersey, Vermont and Massachusetts.