Loan Portfolio and Allowance for Credit Losses, Performance of Loans Modified to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands		Jun. 30, 2025	Jun. 30, 2024
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		$ 896	$ 446
New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	739	305
Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		157	141
30 - 59 Days Past Due [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		126	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]	126	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		80	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]	80	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		690	446
Current [Member] | New York and Other States [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans	[1]	533	305
Current [Member] | Florida [Member]
Performance of Loans Modified to Borrowers Experiencing Financial Difficulty [Abstract]
Performance of modified loans		157	141
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		473	279
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]	473	194
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		0	85
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		80	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]	80	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		393	279
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]	393	194
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		0	85
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		105	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]	18	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		87	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		105	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]	18	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		87	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		318	167
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]	248	111
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		70	56
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		126	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]	126	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		192	167
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]	122	111
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		70	56
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.