CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Feb. 28, 2018	Aug. 31, 2017
Treasury Stock, Shares	20,439,434	20,439,434
Common Class A
Common Stock, Par or Stated Value Per Share	$ 0.2	$ 0.2
Common Stock, Shares Authorized	168,000,000	168,000,000
Common Stock, Shares, Issued	81,087,904	80,200,110