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SIGNIFICANT ACCOUNTING POLICIES - Redeemable Limited Partner's Capital (Narrative) (Details)
12 Months Ended
Jun. 30, 2020
Oct. 31, 2014
Common Class B Unit    
Redeemable Noncontrolling Interest [Line Items]    
Common stock conversion ratio 1 1
Limited Partner    
Redeemable Noncontrolling Interest [Line Items]    
Period of payment of partnership interest upon withdrawal from partnership 5 years