BASIS OF PRESENTATION OF UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Tax Benefits Preservation Plan (Details)	Jan. 28, 2024
Accounting Changes and Error Corrections [Abstract]
Tax Benefits Preservation Plan, maximum ownership percent requiring board of directors approval	4.95%

Tax Benefits Preservation Plan, Ownership Percent Requiring Board Of Directors Approval

No definition available.

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Namespace Prefix:	rgs_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant