CONTINGENCIES - Litigation (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Apr. 30, 2019	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Wave Lengths Hair Salons of Florida Inc
Loss Contingencies [Line Items]
Required amount reserved	$ 90,000
Amount awarded to other party	60,000
Loss contingency accrual	88,150
Litigation settlement expense		$ 23,050
Reduction in accrued liability			$ 25,157	$ 26,396
Notice of suggestion of bankruptcy filed date			Nov. 03, 2020
Wave Lengths Hair Salons of Florida Inc | Maximum
Loss Contingencies [Line Items]
Attorney fees and associated costs	27,000
Incentive award costs	50
Class administration costs	$ 100
Wave Lengths Hair Salons of Florida Inc | Settlement Agreement
Loss Contingencies [Line Items]
Period of settlement payments of monthly rent credits	5 years
Reduction in accrued liability			$ 7,855
Wave Lengths Hair Salons of Florida Inc | Past Tenants
Loss Contingencies [Line Items]
Reduction in accrued liability			4,915
Wave Lengths Hair Salons of Florida Inc | Plaintiff's Counsel and Claims Administrator
Loss Contingencies [Line Items]
Reduction in accrued liability			4,039
Wave Lengths Hair Salons of Florida Inc | Rents and Other Charges for Current Tenants
Loss Contingencies [Line Items]
Reduction in accrued liability			$ 8,348
Securities Class Action Litigation
Loss Contingencies [Line Items]
Notice of suggestion of bankruptcy filed date			Nov. 09, 2020
Derivative Litigation
Loss Contingencies [Line Items]
Notice of suggestion of bankruptcy filed date			Nov. 09, 2020