Loan Portfolio and Allowance for Credit Losses, Performance of Loans Modified to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands		Jun. 30, 2024	Jun. 30, 2023
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		$ 446	$ 630
New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	305	288
Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		141	342
30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		446	630
Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	305	288
Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		141	342
Commercial [Member] | Commercial Real Estate [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Commercial Real Estate [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | 30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | 30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Commercial Real Estate [Member] | 30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | 60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | 60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Commercial Real Estate [Member] | 60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Commercial Real Estate [Member] | 90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Commercial Real Estate [Member] | Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Commercial Real Estate [Member] | Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Other [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | 30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | 30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Other [Member] | 30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | 60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | 60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Other [Member] | 60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Other [Member] | 90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Commercial [Member] | Other [Member] | Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Commercial [Member] | Other [Member] | Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		279	580
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	194	238
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		85	342
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | 90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		279	580
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	194	238
Real Estate Mortgage - 1 to 4 Family [Member] | First Mortgages [Member] | Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		85	342
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | 90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Loans [Member] | Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		167	50
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	111	50
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		56	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | 90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		167	50
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	111	50
Real Estate Mortgage - 1 to 4 Family [Member] | Home Equity Lines of Credit [Member] | Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		56	0
Installment [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Installment [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | 30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | 30 - 59 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Installment [Member] | 30 - 59 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | 60 - 89 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | 60 - 89 Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Installment [Member] | 60 - 89 Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | 90+ Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | 90+ Days Past Due [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Installment [Member] | 90+ Days Past Due [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | Current [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		0	0
Installment [Member] | Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	0	0
Installment [Member] | Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		$ 0	$ 0

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