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REDEEMABLE LIMITED PARTNERS' CAPITAL - Narrative (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 28, 2016
USD ($)
Aug. 25, 2016
USD ($)
Sep. 30, 2016
USD ($)
notes_receivable
limited_partner
Sep. 30, 2015
USD ($)
Jun. 30, 2016
Oct. 31, 2014
Temporary Equity Disclosure [Abstract]            
Maximum exchange percent           14.29%
Temporary Equity [Line Items]            
Limited partners ownership (as a percent)     66.00%   68.00%  
Adjustment to redemption amount     $ (61,808) $ (466,801)    
Reduction to redeemable limited partners' capital to reflect exchange of Class B common unites and associated shares of Class B common stock     (43,072)      
Limited Partner            
Temporary Equity [Line Items]            
Adjustment to redemption amount     61,808      
Reduction to redeemable limited partners' capital to reflect exchange of Class B common unites and associated shares of Class B common stock     $ 43,072      
Interest bearing notes receivable | notes_receivable     0      
Number of limited partners withdrawing from partnership | limited_partner     0      
Distributions to limited partners   $ 22,500 $ 22,137      
Limited Partner | Scenario, Forecast            
Temporary Equity [Line Items]            
Distributions to limited partners $ 22,100          
Redeemable Limited Partners' Capital | Limited Partner            
Temporary Equity [Line Items]            
Adjustment to redemption amount     61,808 $ 466,800    
Reduction to redeemable limited partners' capital to reflect exchange of Class B common unites and associated shares of Class B common stock     43,072      
Distributions to limited partners     $ 22,137