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 9 Months Ended
May 31, 2013
May 31, 2012
May 31, 2013
May 31, 2012
Net sales        
Net sales, As reported $ 344,205 $ 343,268 $ 952,482 $ 954,153
Net sales, Pro forma 344,205 354,825 952,482 1,005,826
Earnings from continuing operations        
Income (Loss) from Continuing Operations Attributable to Parent 46,077 27,737 102,462 89,360
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax $ 46,077 $ 28,089 $ 102,694 $ 93,164
Basic earnings per share from continuing operations        
Income (Loss) from Continuing Operations, Per Basic Share $ 0.63 $ 0.39 $ 1.40 $ 1.29
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic $ 0.63 $ 0.40 $ 1.41 $ 1.35
Diluted earnings per share from continuing operations        
Income (Loss) from Continuing Operations, Per Diluted Share $ 0.62 $ 0.36 $ 1.38 $ 1.19
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted $ 0.62 $ 0.37 $ 1.38 $ 1.24