Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Aug. 31, 2013	Aug. 31, 2012
Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000	1,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	245,000	245,000
Common stock, shares issued	118,309	118,309
Treasury stock, shares	62,025	60,325