Schedule I Parent Only Balance Sheets, Statements Of Earnings And Cash Flows (Balance Sheets) (Parenthetical) (Details)	Jul. 31, 2014	Jul. 31, 2013
Common unitholders, units outstanding	81,228,237	79,072,819
General partner unitholder, units outstanding	820,487	798,715
Parent Company [Member]
Common unitholders, units outstanding	81,228,237	79,072,819
General partner unitholder, units outstanding	820,487	798,715