Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Proforma Results of Operations (Detail)

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Acquisitions - Proforma Results of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Net sales    
Net sales, As reported $ 339,556 $ 307,809
Net sales, Pro forma 339,556 332,742
Earnings from continuing operations    
Earnings from continuing operations, As reported 33,005 30,551
Earnings from continuing operations, Pro Forma $ 33,005 $ 33,672
Basic earnings per share from continuing operations    
Basic earnings per share from continuing operations, As reported (in dollars per share) $ 0.45 $ 0.42
Basic earnings per share from continuing operations, Pro Forma (in dollars per share) $ 0.45 $ 0.46
Diluted earnings per share from continuing operations    
Diluted earnings per share from continuing operations, As reported (in dollars per share) $ 0.44 $ 0.41
Diluted earnings per share from continuing operations, Pro Forma (in dollars per share) $ 0.44 $ 0.45