CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Nov. 30, 2012	Aug. 31, 2012
Tresury stock, shares	2,917,951	2,658,751
Common Class A
Common stock, par value	0.20	0.20
Common stock, shares authorized	168,000,000	168,000,000
Common stock, shares issued	75,799,085	75,519,079