Securities, Amortized Cost and Fair Value of Securities Available-for-Sale (Details) - USD ($) $ in Thousands		Sep. 30, 2023	Jun. 30, 2023
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	$ 341,801	$ 309,153
Unrealized gains		593	670
Unrealized losses		33,678	28,690
Fair value		308,716	281,133
Accrued interest receivable		3,100	2,900
Allowance for credit loss		0
U.S. Government Sponsored Enterprises [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	13,051	13,054
Unrealized gains		0	0
Unrealized losses		2,584	2,231
Fair value		10,467	10,823
U.S. Treasury Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	18,321	18,349
Unrealized gains		0	0
Unrealized losses		2,113	1,849
Fair value		16,208	16,500
State and Political Subdivisions [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	171,032	137,343
Unrealized gains		593	670
Unrealized losses		5	2
Fair value		171,620	138,011
Mortgage-backed Securities-Residential [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	28,661	29,586
Unrealized gains		0	0
Unrealized losses		5,069	3,985
Fair value		23,592	25,601
Mortgage-backed Securities-Multi-family [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	90,918	91,016
Unrealized gains		0	0
Unrealized losses		22,034	18,930
Fair value		68,884	72,086
Corporate Debt Securities [Member]
Available-for-sale debt securities [Abstract]
Amortized cost	[1]	19,818	19,805
Unrealized gains		0	0
Unrealized losses		1,873	1,693
Fair value		$ 17,945	$ 18,112

[1] Amortized cost excludes accrued interest receivable of $3.1 million and $2.9 million at September 30, 2023 and June 30, 2023, respectively, which is included in accrued interest receivable in the consolidated statement of financial condition.