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REDEEMABLE LIMITED PARTNERS' CAPITAL - Schedule of actual quarterly distributions made to limited partners (Details) - Limited Partner - USD ($)
$ in Thousands
12 Months Ended
Aug. 23, 2018
May 24, 2018
Feb. 22, 2018
Nov. 22, 2017
Aug. 24, 2017
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Temporary Equity [Line Items]                
Distributions to limited partners   $ 13,157 $ 20,396 $ 20,752 $ 24,951 $ 69,770 $ 92,892 $ 92,767
Scenario, Forecast                
Temporary Equity [Line Items]                
Distributions to limited partners $ 15,500