Quarterly report pursuant to Section 13 or 15(d)

Reconciliations between Basic and Diluted Earnings Per Share (Detail)

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Reconciliations between Basic and Diluted Earnings Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
May 31, 2012
May 31, 2011
May 31, 2012
May 31, 2011
Earnings Per Share Disclosure [Line Items]        
Net earnings from continuing operations $ 34,401 $ 38,360 $ 103,750 $ 87,163
Plus: 2% Convertible Notes financings costs, net of taxes (468) 383 425 1,222
Net earnings for diluted earnings per share $ 33,933 $ 38,743 $ 104,175 $ 88,385
Weighted average common shares outstanding for basic earnings per share 71,083 68,354 69,184 68,208
Net effect of dilutive securities-equity based compensation plans 1,310 1,250 1,053 1,145
Net effect of 2% Convertible Notes based on the if-converted method 2,978 5,967 4,964 5,961
Weighted average common and equivalent shares outstanding for diluted earnings per share 75,371 75,571 75,201 75,314
Basic Earnings Per Share: $ 0.48 $ 0.56 $ 1.50 $ 1.28
Diluted Earnings Per Share: $ 0.45 $ 0.51 $ 1.39 $ 1.17
Anti-dilutive securities-equity based compensation plans (excluded from earnings per share calculation) 2,173 1,863 2,735 2,295