Income Taxes, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Deferred tax assets [Abstract]
Allowance for loan losses	$ 3,450	$ 3,142
Pension benefits	190	146
Other benefit plans	2,454	1,388
Total deferred tax assets	6,094	4,676
Deferred tax liabilities [Abstract]
Depreciation	903	919
Loan costs	831	763
Real estate investment trust income	2,553	2,253
Unrealized gains on securities	345	3
Other	204	189
Total deferred tax liabilities	4,836	4,127
Net deferred tax asset included in prepaid expenses and other assets	$ 1,258	$ 549