Earnings Per Share (Tables)

6 Months Ended

Feb. 29, 2012

Earnings Per Share [Abstract]

Schedule Of Reconciliations Between Basic And Diluted Earnings Per Share

	Three Months Ended				Six Months Ended
	February 29, 2012		February 28, 2011		February 29, 2012		February 28, 2011
Numerator:
Net earnings from continuing operations	$	32,175	$	22,142	$	69,349	$	48,803
Plus: 2% Convertible Notes financings costs, net of taxes		383		383		893		839
Net earnings for diluted earnings per share	$	32,558	$	22,525	$	70,242	$	49,642
Denominator:
Weighted average common shares outstanding for basic earnings per share		68,064		68,270		68,242		68,135
Net effect of dilutive securities - equity based compensation plans		1,084		1,257		925		1,093
Net effect of 2% Convertible Notes based on the if-converted method		5,957		5,968		5,957		5,958
Weighted average common and equivalent shares outstanding for diluted earnings per share		75,105		75,495		75,124		75,186
Basic Earnings Per Share:	$	0.47	$	0.32	$	1.02	$	0.72
Diluted Earnings Per Share:	$	0.43	$	0.30	$	0.94	$	0.66
Anti-dilutive securities-equity based compensation plans (excluded from earnings per share calculation)		2,175		1,825		3,016		2,511