Income Taxes, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Deferred tax assets [Abstract]
Allowance for loan losses	$ 6,083	$ 5,257
Pension benefits	30	138
Other benefit plans	4,335	3,584
Unrealized losses on securities	6,243	0
Total deferred tax assets	16,691	8,979
Deferred tax liabilities [Abstract]
Depreciation	1,088	998
Net loan costs	1,140	220
Real estate investment trust income	2,839	2,907
Unrealized gains on securities	0	192
Other	244	245
Total deferred tax liabilities	5,311	4,562
Net deferred tax asset included in prepaid expenses and other assets	$ 11,380	$ 4,417