Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Expected tax expense computed at federal statutory rate	$ 114,376	$ 101,564	$ 95,460
State and local taxes, net of federal benefit	16,508	15,900	21,295
Remeasurement of current year NOL	0	0	(1,124)
R&D tax credit, net	(12,604)	(14,205)	(15,708)
Stock-based compensation	(2,385)	(930)	(3,981)
Nonincludible and nondeductible items, net	4,368	1,105	1,588
Remeasurement of deferred taxes	(1,150)	(5,546)	(5,629)
Other	5,612	1,016	(4,123)
Total income tax expense	$ 124,725	$ 98,904	$ 87,778
Effective income tax rate	22.90%	20.40%	19.30%