Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	$ 183,283	$ 157,714
Amounts reclassified to net loss on sale of securities available-for-sale non-interest income	0	251
Tax expense effect recognized in provision for income taxes	0	67
Reclassification adjustment for loss on sale of securities available-for-sale realized in net income, net	0	184
Amortization of pension actuarial losses recognized in other expense	77	106
Tax expense effect recognized in provision for income taxes	20	28
Amortization of pension actuarial losses recognized in salaries and benefits, net	57	78
Total other comprehensive income (loss), net of taxes	1,698	(3,025)
Balance	206,000	183,283
Accumulated Other Comprehensive Loss [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	(21,408)	(18,383)
Other comprehensive (loss) income before reclassification, net of tax	1,641	(3,287)
Amounts reclassified to net loss on sale of securities available-for-sale non-interest income		251
Tax expense effect recognized in provision for income taxes		67
Reclassification adjustment for loss on sale of securities available-for-sale realized in net income, net		184
Amortization of pension actuarial losses recognized in other expense	77	106
Tax expense effect recognized in provision for income taxes	20	28
Amortization of pension actuarial losses recognized in salaries and benefits, net	57	78
Total other comprehensive income (loss), net of taxes	1,698	(3,025)
Balance	(19,710)	(21,408)
Unrealized Losses on Securities Available-for-sale [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	(20,531)	(17,268)
Other comprehensive (loss) income before reclassification, net of tax	1,349	(3,447)
Amounts reclassified to net loss on sale of securities available-for-sale non-interest income		251
Tax expense effect recognized in provision for income taxes		67
Reclassification adjustment for loss on sale of securities available-for-sale realized in net income, net		184
Amortization of pension actuarial losses recognized in other expense	0	0
Tax expense effect recognized in provision for income taxes	0	0
Amortization of pension actuarial losses recognized in salaries and benefits, net	0	0
Total other comprehensive income (loss), net of taxes	1,349	(3,263)
Balance	(19,182)	(20,531)
Pension Benefits [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance	(877)	(1,115)
Other comprehensive (loss) income before reclassification, net of tax	292	160
Amounts reclassified to net loss on sale of securities available-for-sale non-interest income		0
Tax expense effect recognized in provision for income taxes		0
Reclassification adjustment for loss on sale of securities available-for-sale realized in net income, net		0
Amortization of pension actuarial losses recognized in other expense	77	106
Tax expense effect recognized in provision for income taxes	20	28
Amortization of pension actuarial losses recognized in salaries and benefits, net	57	78
Total other comprehensive income (loss), net of taxes	349	238
Balance	$ (528)	$ (877)