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Contingencies - Litigation (Details) - Wave Lengths Hair Salonsof Florida Inc - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2019
Jun. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2020
Loss Contingencies [Line Items]          
Required amount reserved $ 90,000,000        
Amount awarded to other party $ 60,000,000        
Period of settlement payments of monthly rent credits 5 years        
Loss contingency accrual $ 88,150,000        
Litigation settlement expense     $ 23,050,000    
Reduction in accrued liability   $ 3,276,000 $ 26,396,000 $ 26,396,000 $ 3,276,000
Maximum          
Loss Contingencies [Line Items]          
Attorney fees and associated costs 27,000,000        
Incentive award costs 50,000        
Class administration costs $ 100,000