Income Taxes, Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Income Taxes [Abstract]
Tax based on federal statutory rate	21.00%	21.00%
State income taxes, net of federal benefit	1.64%	0.20%
Tax-exempt income	(6.31%)	(6.34%)
Captive insurance premium income	0.96%	1.22%
Other, net	(0.42%)	(0.34%)
Total income tax expense	14.95%	13.30%