Loan Portfolio and Allowance for Credit Losses, Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty (Details) - Payment Delay [Member]		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]
Weighted average term		43 months	18 months	54 months	62 months
New York and Other States [Member]
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]
Weighted average term	[1]	34 months	18 months	33 months	38 months
Florida [Member]
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]
Weighted average term		9 months	0 months	21 months	24 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		22 months	18 months	27 months	44 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]	22 months	18 months	15 months	20 months
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]
Weighted average term				12 months	24 months
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]
Weighted average term		9 months		9 months
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract]
Weighted average term		9 months		9 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		12 months		18 months	18 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]	12 months		18 months	18 months

[1] Includes New York, New Jersey, Vermont and Massachusetts.