Income Taxes (Reconciliation Of The Effective Income Tax Rate) (Details)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%	21.00%
State and local income taxes	2.40%	0.70%	3.20%
Research and development tax credit	(1.10%)	(1.70%)	(0.80%)
Net windfall tax benefits - stock-based compensation	(0.40%)	(0.10%)	(0.60%)
Other	0.40%	0.40%	0.60%
Effective rate	22.30%	20.30%	23.40%