Common Stock And Earnings Per Share (Tables)

12 Months Ended

Aug. 31, 2011

Common Stock And Earnings Per Share [Abstract]

Schedule Of Common Stock Outstanding

Years Ended August 31,	2011			2010			2009
Balance, beginning of year		46,024			46,740			47,969
Common stock issued for employee stock plans		1,283			2,068			956
Repurchase of common stock		(2,252	)		(2,784	)		(2,185	)
Balance, end of year		45,055			46,024			46,740

Computation Of Weighted Average Shares Outstanding Basic And Diluted Weighted Average Shares

	Net Income (Numerator)						Weighted Average Common Shares (Denominator)						Per Share Amount
Years Ended August 31,	2011		2010		2009		2011		2010		2009		2011		2010		2009
Basic EPS
Income available to common stockholders	$	171,046	$	150,211	$	144,950		45,953		46,698		47,158	$	3.72	$	3.22	$	3.07
Diluted EPS
Dilutive effect of stock options and restricted stock								1,402		1,306		1,631
Income available to common stockholders plus assumed conversions	$	171,046	$	150,211	$	144,950		47,355		48,004		48,789	$	3.61	$	3.13	$	2.97