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INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Detail 2) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Expected tax expense computed at federal statutory rate	[1]	$ 84,344	$ 68,861	$ 83,805
State and local taxes, net of federal benefit		15,965	13,216	11,860
Nonincludible and nondeductible items, net		3,133	1,971	1,832
Remeasurement of deferred taxes and transition tax			(2,182)	(86,593)
Effect of foreign tax rates		(377)	(380)	(1,261)
R&D tax credit, net		(10,700)	(6,755)	(3,630)
Other tax credits		(1,183)	(2,138)	(2,102)
Stock-based compensation		(10,900)	(7,493)	(5,388)
Other		(125)	(2,795)	(1,030)
Total income tax expense (benefit)		$ 80,157	$ 62,305	$ (2,507)
[1] The U.S. federal statutory income tax rate for FY2020 and FY2019 is 21.0 percent.  The federal statutory rate for FY2018 was a blended rate of 28.06 percent due to the TCJA.

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