SIGNIFICANT ACCOUNTING POLICIES - Deferred Compensation Plan Assets and Related Liabilities (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Non-current portion of deferred compensation plan assets	$ 47,400	$ 59,600
Deferred compensation plan (expense) income	9,401	(12,745)	$ (3,904)
Other Income (Expense), Net
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Realized and unrealized gains on plan assets	(9,400)	12,700	3,900
Selling, General and Administrative Expenses
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation plan (expense) income	(9,400)	12,700	$ 3,900
Prepaid Expenses And Other Current Assets
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Deferred compensation plan assets, current	$ 5,300	$ 5,500