BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Standards (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2020 USD ($)	Jul. 01, 2019 USD ($)	Jun. 30, 2019 USD ($) lease_renewal_option	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash, cash equivalents and restricted cash				$ 148,775	$ 208,634	$ 187,778
Lease renewal options | lease_renewal_option			1
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cash, cash equivalents and restricted cash			$ 22,200	$ 38,400	$ 37,600
Scenario, Forecast | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Franchise rent expense	$ 110,000
Franchise rental income	$ 110,000
Subsequent Event | Scenario, Forecast | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset		$ 1,000,000
Operating lease liability		$ 1,000,000