Loans and Allowance for Credit Losses on Loans, Major Loan Segments and Classes (Details) - USD ($) $ in Thousands	Sep. 30, 2023		Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022
Major Loan Segments and Classes [Abstract]
Total gross loans	$ 1,448,340	[1],[2]	$ 1,408,866
Allowance for credit losses on loans	(20,249)		(21,212)	$ (22,147)	$ (22,761)
Net loans receivable	1,428,091		1,387,654
Deferred fees and cost, net	62		75
Accrued interest receivable	6,000		5,500
Residential Real Estate [Member] | Residential Real Estate [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans	397,626
Allowance for credit losses on loans	(4,293)		(2,794)	(2,471)	(2,373)
Residential Real Estate [Member] | Construction and Land [Member]
Major Loan Segments and Classes [Abstract]
Allowance for credit losses on loans				(177)	(141)
Residential Real Estate [Member] | Multi-family [Member]
Major Loan Segments and Classes [Abstract]
Allowance for credit losses on loans				(159)	(119)
Commercial Real Estate [Member] | Real Estate [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans	910,165
Allowance for credit losses on loans	(12,356)		(14,839)	(15,392)	(16,221)
Commercial Real Estate [Member] | Construction [Member]
Major Loan Segments and Classes [Abstract]
Allowance for credit losses on loans				(1,044)	(1,114)
Consumer Loan [Member] | Home Equity [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans	25,467
Allowance for credit losses on loans	(188)		(46)	(44)	(89)
Consumer Loan [Member] | Consumer [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans	4,778
Allowance for credit losses on loans	(490)		(332)	(274)	(349)
Commercial Loans [Member]
Major Loan Segments and Classes [Abstract]
Total gross loans	110,304
Allowance for credit losses on loans	$ (2,922)		$ (3,201)	$ (2,586)	$ (2,355)

[1] Loan balances exclude accrued interest receivable of $6.0 million at September 30, 2023, which is included in accrued interest receivable in the consolidated statement of financial condition.

[2] Loan balances include net deferred fees/cost of $62,000 at September 30, 2023.