Loans and Allowance for Credit Losses on Loans - Delinquent and Nonaccrual Loans by Past Due Status (Details) - USD ($) $ in Thousands		Dec. 31, 2025	Jun. 30, 2025
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans	[1],[2]	$ 1,687,184	$ 1,627,406
Loans on non-accrual		3,261	3,060
Commercial Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		129,678	116,769
Loans on non-accrual		129	135
Residential Real Estate [Member] | Residential Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		414,829	417,719
Loans on non-accrual		2,294	2,265
Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		1,097,997	1,054,504
Loans on non-accrual		605	628
Home Equity [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		40,574	34,103
Loans on non-accrual		216	30
Consumer [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		4,106	4,311
Loans on non-accrual		17	2
30 to 59 Days Past Due [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		3,726	105
30 to 59 Days Past Due [Member] | Commercial Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		4	0
30 to 59 Days Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		3,228	0
30 to 59 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		322	0
30 to 59 Days Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		115	85
30 to 59 Days Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		57	20
60 to 89 Days Past Due [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		1,284	1,000
60 to 89 Days Past Due [Member] | Commercial Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans			0
60 to 89 Days Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		1,093	775
60 to 89 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		188	209
60 to 89 Days Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		0	13
60 to 89 Days Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		3	3
90 Days or More Past Due [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		1,251	1,867
90 Days or More Past Due [Member] | Commercial Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		129	106
90 Days or More Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		903	1,362
90 Days or More Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		173	367
90 Days or More Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		29	30
90 Days or More Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		17	2
Total Past Due [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		6,261	2,972
Total Past Due [Member] | Commercial Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		133	106
Total Past Due [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		5,224	2,137
Total Past Due [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		683	576
Total Past Due [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		144	128
Total Past Due [Member] | Consumer [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		77	25
Current [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		1,680,923	1,624,434
Current [Member] | Commercial Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		129,545	116,663
Current [Member] | Residential Real Estate [Member] | Residential Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		409,605	415,582
Current [Member] | Real Estate [Member] | Commercial Real Estate Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		1,097,314	1,053,928
Current [Member] | Home Equity [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		40,430	33,975
Current [Member] | Consumer [Member] | Consumer Portfolio [Member]
Loans and Allowance for Credit Losses on Loans [Abstract]
Total loans		$ 4,029	$ 4,286

[1] Loan balances exclude accrued interest receivable of $7.7 million and $7.0 million at December 31, 2025 and June 30, 2025, respectively, which is included in accrued interest receivable in the consolidated statement of financial condition.

[2] Loan balances include net deferred fees/(costs) of ($483,000) and ($567,000) at December 31, 2025 and June 30, 2025, respectively.