Quarterly report pursuant to Section 13 or 15(d)

Proforma Results of Operations (Detail)

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Proforma Results of Operations (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
Business Acquisition, Pro Forma Information [Line Items]        
Net sales, As reported $ 429,215 $ 392,777 $ 1,200,038 $ 1,041,887
Net sales, Pro forma 430,356 427,159 1,219,104 1,178,722
Earnings from continuing operations, As reported 34,401 38,360 103,750 87,163
Earnings from continuing operations, Pro forma $ 34,668 $ 42,037 $ 107,485 $ 98,927
Basic earnings per share from continuing operations, As reported $ 0.48 $ 0.56 $ 1.50 $ 1.28
Basic earnings per share from continuing operations, Pro forma $ 0.49 $ 0.61 $ 1.55 $ 1.45
Diluted earnings per share from continuing operations, As reported $ 0.45 $ 0.51 $ 1.39 $ 1.17
Diluted earnings per share from continuing operations, Pro forma $ 0.45 $ 0.56 $ 1.43 $ 1.33