Loans and Allowance for Loan Losses, Non-accrual Loans, by Loan Class (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Non accrual loans by loan class [Abstract]
Total non-accrual loans		$ 18,739	$ 21,061
Restructured real estate mortgages - 1 to 4 family		17	23
Total nonperforming loans		18,756	21,084
Other real estate owned		362	541
New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	16,709	19,874
Restructured real estate mortgages - 1 to 4 family	[1]	17	23
Total nonperforming loans	[1]	16,726	19,897
Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		2,030	1,187
Restructured real estate mortgages - 1 to 4 family		0	0
Total nonperforming loans		2,030	1,187
Residential Real Estate [Member]
Non accrual loans by loan class [Abstract]
Non accrual residential mortgage loans in the process of foreclosure		9,700	11,600
Commercial [Member] | Commercial Real Estate [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		67	372
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	67	372
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		0	0
Commercial [Member] | Other [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		45	80
Commercial [Member] | Other [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	45	80
Commercial [Member] | Other [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		15,787	17,647
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	13,990	16,637
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		1,797	1,010
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		292	127
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	247	80
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		45	47
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		2,511	2,792
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	2,337	2,662
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		174	130
Installment [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		37	43
Installment [Member] | New York and Other States [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans	[1]	23	43
Installment [Member] | Florida [Member]
Non accrual loans by loan class [Abstract]
Total non-accrual loans		$ 14	$ 0

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