Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020
Goodwill [Line Items]
Goodwill	$ 229,582,000	$ 227,457,000
Goodwill impairment	0	40,164,000	$ 0
Franchise reporting unit
Goodwill [Line Items]
Goodwill	$ 229,600,000	$ 227,500,000
Percentage of fair value in excess of carrying amount	50.00%	50.00%		50.00%
Franchise reporting unit \| Discount Rate
Goodwill [Line Items]
Goodwill measurement input		13.00%
Company-owned reporting unit
Goodwill [Line Items]
Goodwill	$ 0	$ 0
Percentage of fair value in excess of carrying amount			20.00%
Goodwill impairment		$ 40,200,000