Loan Portfolio and Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans by Loan Class (Details) - USD ($) $ in Thousands		Mar. 31, 2026	Dec. 31, 2025
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total nonperforming loans		$ 21,465	$ 20,672
Installment [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		63	51
New York and Other States [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total nonperforming loans	[1]	17,223	16,602
New York and Other States [Member] | Installment [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans	[1]	43	29
Florida [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total nonperforming loans		4,242	4,070
Florida [Member] | Installment [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		20	22
Commercial Real Estate [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		1,961	1,983
Commercial Real Estate [Member] | New York and Other States [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans	[1]	1,961	1,983
Commercial Real Estate [Member] | Florida [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		0	0
Other [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		7	7
Other [Member] | New York and Other States [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans	[1]	7	7
Other [Member] | Florida [Member] | Commercial [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		0	0
First Mortgages [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		16,753	15,946
First Mortgages [Member] | New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans	[1]	12,966	12,241
First Mortgages [Member] | Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		3,787	3,705
Home Equity Loans [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		410	430
Home Equity Loans [Member] | New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans	[1]	405	425
Home Equity Loans [Member] | Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		5	5
Home Equity Lines of Credit [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		2,271	2,255
Home Equity Lines of Credit [Member] | New York and Other States [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans	[1]	1,841	1,917
Home Equity Lines of Credit [Member] | Florida [Member] | Real Estate Mortgage - 1 to 4 Family [Member]
Loan Portfolio and Allowance for Credit Losses [Abstract]
Total non-accrual loans		$ 430	$ 338

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