Income Taxes - Reconciliation of Income Tax Expense at the Statutory Rate to Actual Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Tax at statutory rate	$ 12,538	$ 7,231	$ 7,550
Actual provision	12,525	6,887	7,047
Increase (reduction) in taxes
Nontaxable Municipal Income	(453)	(444)	(400)
State tax, net of Federal benefit	1,018	299	487
Cash surrender value of Bank-owned life insurance	(378)	(214)	(279)
Tax Credit Benefits	(11)	(48)	(270)
Other, net	$ (189)	$ 63	$ (41)