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REDEEMABLE LIMITED PARTNERS' CAPITAL - Schedule Of Common Stock Units Quarterly Exchanges (Details) - Class B Common Stock
$ in Thousands
Jul. 31, 2018
USD ($)
shares
Limited Partners' Capital Account [Line Items]  
Class B common units and associated Class B common shares exchanged (in shares) | shares 1,310,771
Reduction in Redeemable Limited Partners' Capital | $ $ 50,792