Benefit Plans - Post-retirement (Details)	12 Months Ended
	Jun. 30, 2024 USD ($) Office	Jun. 30, 2023 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Cash surrender value of bank owned life insurance	$ 8,600,000	$ 8,400,000
Bank owned life insurance, non-taxable income	$ 186,000	186,000
Executive Officer [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Number of executive officers | Office	1
Post-retirement compensation liability	$ 5,700,000	5,700,000
Post-retirement compensation expense	$ 85,000
Post-retirement recovery		(1,100,000)
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Employer matching contributions (percent)	3.00%
Employee contributions, immediate vesting (percent)	100.00%
Vesting term for employer matching contributions	6 years
401(k) defined contribution expense	$ 303,000	$ 306,000