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REDEEMABLE LIMITED PARTNERS' CAPITAL - Narrative (Details)
$ in Thousands
9 Months Ended 12 Months Ended
Mar. 31, 2017
USD ($)
notes_receivable
limited_partner
Mar. 31, 2016
USD ($)
Jun. 30, 2016
Oct. 31, 2014
Temporary Equity Disclosure [Abstract]        
Maximum exchange amount (as a percent)       14.29%
Limited partners ownership (as a percent) 64.00%   68.00%  
Temporary Equity [Line Items]        
Total reductions to redeemable limited partners' capital $ 0      
Limited partner        
Temporary Equity [Line Items]        
Decrease to fair value for the redemption amount $ 247,042      
Number of interest bearing notes receivable executed | notes_receivable 0      
Number of limited partners withdrawing from partnership | limited_partner 1      
Redeemable limited partners' capital | Limited partner        
Temporary Equity [Line Items]        
Decrease to fair value for the redemption amount $ 247,042 $ 685,600    
Total reductions to redeemable limited partners' capital $ 247,100      
Promissory note        
Temporary Equity [Line Items]        
Promissory note for which common units are not eligible for exchange, term 5 years      
Five-year, unsecured, non-interest bearing term promissory note | Promissory note        
Temporary Equity [Line Items]        
Promissory note for which common units are not eligible for exchange, term 5 years